WO2010021391A1 - イオン性化合物及びその製造方法、並びに、これを用いたイオン伝導性材料 - Google Patents
イオン性化合物及びその製造方法、並びに、これを用いたイオン伝導性材料 Download PDFInfo
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- WO2010021391A1 WO2010021391A1 PCT/JP2009/064678 JP2009064678W WO2010021391A1 WO 2010021391 A1 WO2010021391 A1 WO 2010021391A1 JP 2009064678 W JP2009064678 W JP 2009064678W WO 2010021391 A1 WO2010021391 A1 WO 2010021391A1
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- WIPO (PCT)
- Prior art keywords
- ionic compound
- cyanide
- compound
- ionic
- tetracyanoborate
- Prior art date
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- 150000008040 ionic compounds Chemical class 0.000 title claims abstract description 256
- 239000004020 conductor Substances 0.000 title claims description 32
- 238000000034 method Methods 0.000 title abstract description 49
- 230000008569 process Effects 0.000 title abstract description 8
- XFXPMWWXUTWYJX-UHFFFAOYSA-N Cyanide Chemical compound N#[C-] XFXPMWWXUTWYJX-UHFFFAOYSA-N 0.000 claims abstract description 66
- 150000001639 boron compounds Chemical class 0.000 claims abstract description 64
- 239000012535 impurity Substances 0.000 claims abstract description 62
- 239000007858 starting material Substances 0.000 claims abstract description 61
- 125000001153 fluoro group Chemical group F* 0.000 claims abstract description 42
- 150000002892 organic cations Chemical class 0.000 claims abstract description 23
- 150000001767 cationic compounds Chemical class 0.000 claims abstract description 21
- 229910001411 inorganic cation Inorganic materials 0.000 claims abstract description 21
- -1 halide ion Chemical class 0.000 claims description 227
- 238000004519 manufacturing process Methods 0.000 claims description 98
- LELOWRISYMNNSU-UHFFFAOYSA-N hydrogen cyanide Chemical compound N#C LELOWRISYMNNSU-UHFFFAOYSA-N 0.000 claims description 88
- 150000002500 ions Chemical class 0.000 claims description 59
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 51
- 229910001868 water Inorganic materials 0.000 claims description 51
- LEIMLDGFXIOXMT-UHFFFAOYSA-N trimethylsilyl cyanide Chemical compound C[Si](C)(C)C#N LEIMLDGFXIOXMT-UHFFFAOYSA-N 0.000 claims description 50
- 150000001412 amines Chemical class 0.000 claims description 49
- 239000007800 oxidant agent Substances 0.000 claims description 48
- 125000000962 organic group Chemical group 0.000 claims description 31
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- 239000012043 crude product Substances 0.000 claims description 21
- 229910052710 silicon Inorganic materials 0.000 claims description 14
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 5
- 239000010703 silicon Substances 0.000 claims description 5
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- 238000003786 synthesis reaction Methods 0.000 description 229
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- HMUNWXXNJPVALC-UHFFFAOYSA-N 1-[4-[2-(2,3-dihydro-1H-inden-2-ylamino)pyrimidin-5-yl]piperazin-1-yl]-2-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)ethanone Chemical compound C1C(CC2=CC=CC=C12)NC1=NC=C(C=N1)N1CCN(CC1)C(CN1CC2=C(CC1)NN=N2)=O HMUNWXXNJPVALC-UHFFFAOYSA-N 0.000 description 23
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- 238000005160 1H NMR spectroscopy Methods 0.000 description 13
- VZSRBBMJRBPUNF-UHFFFAOYSA-N 2-(2,3-dihydro-1H-inden-2-ylamino)-N-[3-oxo-3-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)propyl]pyrimidine-5-carboxamide Chemical compound C1C(CC2=CC=CC=C12)NC1=NC=C(C=N1)C(=O)NCCC(N1CC2=C(CC1)NN=N2)=O VZSRBBMJRBPUNF-UHFFFAOYSA-N 0.000 description 13
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 13
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 13
- 239000007864 aqueous solution Substances 0.000 description 13
- 239000007788 liquid Substances 0.000 description 13
- 229910001416 lithium ion Inorganic materials 0.000 description 13
- ZWEHNKRNPOVVGH-UHFFFAOYSA-N 2-Butanone Chemical compound CCC(C)=O ZWEHNKRNPOVVGH-UHFFFAOYSA-N 0.000 description 12
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 description 12
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- FFUAGWLWBBFQJT-UHFFFAOYSA-N hexamethyldisilazane Chemical compound C[Si](C)(C)N[Si](C)(C)C FFUAGWLWBBFQJT-UHFFFAOYSA-N 0.000 description 12
- 229910001413 alkali metal ion Inorganic materials 0.000 description 11
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- 238000004364 calculation method Methods 0.000 description 10
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- 238000004502 linear sweep voltammetry Methods 0.000 description 10
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- 125000000026 trimethylsilyl group Chemical group [H]C([H])([H])[Si]([*])(C([H])([H])[H])C([H])([H])[H] 0.000 description 9
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- KRRBFUJMQBDDPR-UHFFFAOYSA-N tetrabutylazanium;cyanide Chemical compound N#[C-].CCCC[N+](CCCC)(CCCC)CCCC KRRBFUJMQBDDPR-UHFFFAOYSA-N 0.000 description 7
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- 239000001989 lithium alloy Substances 0.000 description 1
- JORQDGTZGKHEEO-UHFFFAOYSA-N lithium cyanide Chemical compound [Li+].N#[C-] JORQDGTZGKHEEO-UHFFFAOYSA-N 0.000 description 1
- GCICAPWZNUIIDV-UHFFFAOYSA-N lithium magnesium Chemical compound [Li].[Mg] GCICAPWZNUIIDV-UHFFFAOYSA-N 0.000 description 1
- 229910001496 lithium tetrafluoroborate Inorganic materials 0.000 description 1
- DVJXWGUUOPZAMD-UHFFFAOYSA-N lithium thallium Chemical compound [Li].[Tl] DVJXWGUUOPZAMD-UHFFFAOYSA-N 0.000 description 1
- 159000000003 magnesium salts Chemical class 0.000 description 1
- 150000002697 manganese compounds Chemical class 0.000 description 1
- 229910052976 metal sulfide Inorganic materials 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- LWOLYJHVZKMBFE-UHFFFAOYSA-N methoxy(trimethyl)azanium Chemical compound CO[N+](C)(C)C LWOLYJHVZKMBFE-UHFFFAOYSA-N 0.000 description 1
- 229940095102 methyl benzoate Drugs 0.000 description 1
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 1
- XTBFPVLHGVYOQH-UHFFFAOYSA-N methyl phenyl carbonate Chemical compound COC(=O)OC1=CC=CC=C1 XTBFPVLHGVYOQH-UHFFFAOYSA-N 0.000 description 1
- 229940017219 methyl propionate Drugs 0.000 description 1
- GYNNXHKOJHMOHS-UHFFFAOYSA-N methyl-cycloheptane Natural products CC1CCCCCC1 GYNNXHKOJHMOHS-UHFFFAOYSA-N 0.000 description 1
- XLSZMDLNRCVEIJ-UHFFFAOYSA-N methylimidazole Natural products CC1=CNC=N1 XLSZMDLNRCVEIJ-UHFFFAOYSA-N 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 239000011733 molybdenum Substances 0.000 description 1
- 150000004682 monohydrates Chemical class 0.000 description 1
- CQWWONKCVFKXRE-UHFFFAOYSA-N n,n-dimethylethanamine;hydrobromide Chemical compound [Br-].CC[NH+](C)C CQWWONKCVFKXRE-UHFFFAOYSA-N 0.000 description 1
- KSKTVNNRMXUMIY-UHFFFAOYSA-N n,n-dimethylethanamine;hydrochloride Chemical compound Cl.CCN(C)C KSKTVNNRMXUMIY-UHFFFAOYSA-N 0.000 description 1
- YKYONYBAUNKHLG-UHFFFAOYSA-N n-Propyl acetate Natural products CCCOC(C)=O YKYONYBAUNKHLG-UHFFFAOYSA-N 0.000 description 1
- MTHFROHDIWGWFD-UHFFFAOYSA-N n-butyl-n-methylbutan-1-amine Chemical compound CCCCN(C)CCCC MTHFROHDIWGWFD-UHFFFAOYSA-N 0.000 description 1
- DIOQZVSQGTUSAI-UHFFFAOYSA-N n-butylhexane Natural products CCCCCCCCCC DIOQZVSQGTUSAI-UHFFFAOYSA-N 0.000 description 1
- KERBAAIBDHEFDD-UHFFFAOYSA-N n-ethylformamide Chemical compound CCNC=O KERBAAIBDHEFDD-UHFFFAOYSA-N 0.000 description 1
- 229910021382 natural graphite Inorganic materials 0.000 description 1
- 239000011331 needle coke Substances 0.000 description 1
- 229910052758 niobium Inorganic materials 0.000 description 1
- 239000010955 niobium Substances 0.000 description 1
- GUCVJGMIXFAOAE-UHFFFAOYSA-N niobium atom Chemical compound [Nb] GUCVJGMIXFAOAE-UHFFFAOYSA-N 0.000 description 1
- 229910017604 nitric acid Inorganic materials 0.000 description 1
- 125000000449 nitro group Chemical group [O-][N+](*)=O 0.000 description 1
- 229910017464 nitrogen compound Inorganic materials 0.000 description 1
- 150000002830 nitrogen compounds Chemical class 0.000 description 1
- 125000000018 nitroso group Chemical group N(=O)* 0.000 description 1
- 125000002347 octyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 238000005580 one pot reaction Methods 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 229920000620 organic polymer Polymers 0.000 description 1
- 239000012285 osmium tetroxide Substances 0.000 description 1
- 229910000489 osmium tetroxide Inorganic materials 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 125000004430 oxygen atom Chemical group O* 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 229940100684 pentylamine Drugs 0.000 description 1
- 239000002006 petroleum coke Substances 0.000 description 1
- 239000005011 phenolic resin Substances 0.000 description 1
- 150000004714 phosphonium salts Chemical group 0.000 description 1
- 150000003014 phosphoric acid esters Chemical class 0.000 description 1
- DFOXKPDFWGNLJU-UHFFFAOYSA-N pinacolyl alcohol Chemical compound CC(O)C(C)(C)C DFOXKPDFWGNLJU-UHFFFAOYSA-N 0.000 description 1
- 239000006253 pitch coke Substances 0.000 description 1
- 238000001637 plasma atomic emission spectroscopy Methods 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 239000002574 poison Substances 0.000 description 1
- 231100000614 poison Toxicity 0.000 description 1
- 229920001197 polyacetylene Polymers 0.000 description 1
- 229920000128 polypyrrole Polymers 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- XAEFZNCEHLXOMS-UHFFFAOYSA-M potassium benzoate Chemical compound [K+].[O-]C(=O)C1=CC=CC=C1 XAEFZNCEHLXOMS-UHFFFAOYSA-M 0.000 description 1
- 229940094037 potassium bromate Drugs 0.000 description 1
- 235000019396 potassium bromate Nutrition 0.000 description 1
- VKJKEPKFPUWCAS-UHFFFAOYSA-M potassium chlorate Chemical compound [K+].[O-]Cl(=O)=O VKJKEPKFPUWCAS-UHFFFAOYSA-M 0.000 description 1
- 239000012286 potassium permanganate Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 235000019260 propionic acid Nutrition 0.000 description 1
- 229940090181 propyl acetate Drugs 0.000 description 1
- 238000000425 proton nuclear magnetic resonance spectrum Methods 0.000 description 1
- 239000012264 purified product Substances 0.000 description 1
- PBMFSQRYOILNGV-UHFFFAOYSA-N pyridazine Chemical compound C1=CC=NN=C1 PBMFSQRYOILNGV-UHFFFAOYSA-N 0.000 description 1
- OENLEHTYJXMVBG-UHFFFAOYSA-N pyridine;hydrate Chemical compound [OH-].C1=CC=[NH+]C=C1 OENLEHTYJXMVBG-UHFFFAOYSA-N 0.000 description 1
- JUJWROOIHBZHMG-UHFFFAOYSA-O pyridinium Chemical compound C1=CC=[NH+]C=C1 JUJWROOIHBZHMG-UHFFFAOYSA-O 0.000 description 1
- 239000002296 pyrolytic carbon Substances 0.000 description 1
- ZVJHJDDKYZXRJI-UHFFFAOYSA-N pyrroline Natural products C1CC=NC1 ZVJHJDDKYZXRJI-UHFFFAOYSA-N 0.000 description 1
- IUVKMZGDUIUOCP-BTNSXGMBSA-N quinbolone Chemical compound O([C@H]1CC[C@H]2[C@H]3[C@@H]([C@]4(C=CC(=O)C=C4CC3)C)CC[C@@]21C)C1=CCCC1 IUVKMZGDUIUOCP-BTNSXGMBSA-N 0.000 description 1
- 230000009257 reactivity Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000001953 recrystallisation Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000001172 regenerating effect Effects 0.000 description 1
- 238000001226 reprecipitation Methods 0.000 description 1
- 238000001223 reverse osmosis Methods 0.000 description 1
- 239000000565 sealant Substances 0.000 description 1
- 229910002027 silica gel Inorganic materials 0.000 description 1
- 239000000741 silica gel Substances 0.000 description 1
- XUXNAKZDHHEHPC-UHFFFAOYSA-M sodium bromate Chemical compound [Na+].[O-]Br(=O)=O XUXNAKZDHHEHPC-UHFFFAOYSA-M 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 159000000000 sodium salts Chemical class 0.000 description 1
- 239000012265 solid product Substances 0.000 description 1
- 150000005846 sugar alcohols Polymers 0.000 description 1
- HXJUTPCZVOIRIF-UHFFFAOYSA-N sulfolane Chemical compound O=S1(=O)CCCC1 HXJUTPCZVOIRIF-UHFFFAOYSA-N 0.000 description 1
- 125000000472 sulfonyl group Chemical group *S(*)(=O)=O 0.000 description 1
- 150000003462 sulfoxides Chemical class 0.000 description 1
- 125000004434 sulfur atom Chemical group 0.000 description 1
- 150000003464 sulfur compounds Chemical class 0.000 description 1
- 239000006228 supernatant Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 229950011008 tetrachloroethylene Drugs 0.000 description 1
- NKEVUMSCVLJVFU-UHFFFAOYSA-N tetraethylazanium isocyanate Chemical compound [N-]=C=O.CC[N+](CC)(CC)CC NKEVUMSCVLJVFU-UHFFFAOYSA-N 0.000 description 1
- PCZOZSATUTWXIC-UHFFFAOYSA-N tetraethylazanium;cyanide Chemical compound N#[C-].CC[N+](CC)(CC)CC PCZOZSATUTWXIC-UHFFFAOYSA-N 0.000 description 1
- QSUJAUYJBJRLKV-UHFFFAOYSA-M tetraethylazanium;fluoride Chemical compound [F-].CC[N+](CC)(CC)CC QSUJAUYJBJRLKV-UHFFFAOYSA-M 0.000 description 1
- WGHUNMFFLAMBJD-UHFFFAOYSA-M tetraethylazanium;perchlorate Chemical compound [O-]Cl(=O)(=O)=O.CC[N+](CC)(CC)CC WGHUNMFFLAMBJD-UHFFFAOYSA-M 0.000 description 1
- YFZDLRVCXDBOPH-UHFFFAOYSA-N tetraheptylazanium Chemical compound CCCCCCC[N+](CCCCCCC)(CCCCCCC)CCCCCCC YFZDLRVCXDBOPH-UHFFFAOYSA-N 0.000 description 1
- DTIFFPXSSXFQCJ-UHFFFAOYSA-N tetrahexylazanium Chemical compound CCCCCC[N+](CCCCCC)(CCCCCC)CCCCCC DTIFFPXSSXFQCJ-UHFFFAOYSA-N 0.000 description 1
- NGZJYNRFVQFBLF-UHFFFAOYSA-N tetrakis(1,1,2,2,2-pentafluoroethyl)azanium Chemical compound FC(F)(F)C(F)(F)[N+](C(F)(F)C(F)(F)F)(C(F)(F)C(F)(F)F)C(F)(F)C(F)(F)F NGZJYNRFVQFBLF-UHFFFAOYSA-N 0.000 description 1
- CHYBTAZWINMGHA-UHFFFAOYSA-N tetraoctylazanium Chemical compound CCCCCCCC[N+](CCCCCCCC)(CCCCCCCC)CCCCCCCC CHYBTAZWINMGHA-UHFFFAOYSA-N 0.000 description 1
- OSBSFAARYOCBHB-UHFFFAOYSA-N tetrapropylammonium Chemical compound CCC[N+](CCC)(CCC)CCC OSBSFAARYOCBHB-UHFFFAOYSA-N 0.000 description 1
- 229920005992 thermoplastic resin Polymers 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 229910000314 transition metal oxide Inorganic materials 0.000 description 1
- 125000005270 trialkylamine group Chemical group 0.000 description 1
- 150000003852 triazoles Chemical class 0.000 description 1
- QNXDQTMGZAKCMX-UHFFFAOYSA-O tributylazanium;cyanide Chemical compound N#[C-].CCCC[NH+](CCCC)CCCC QNXDQTMGZAKCMX-UHFFFAOYSA-O 0.000 description 1
- DQWPFSLDHJDLRL-UHFFFAOYSA-N triethyl phosphate Chemical compound CCOP(=O)(OCC)OCC DQWPFSLDHJDLRL-UHFFFAOYSA-N 0.000 description 1
- ASVMCHUOIVTKQQ-UHFFFAOYSA-M triethyl(methyl)azanium;fluoride Chemical compound [F-].CC[N+](C)(CC)CC ASVMCHUOIVTKQQ-UHFFFAOYSA-M 0.000 description 1
- DSNKGSSXSYPWNC-UHFFFAOYSA-O triethylazanium;cyanide Chemical class N#[C-].CC[NH+](CC)CC DSNKGSSXSYPWNC-UHFFFAOYSA-O 0.000 description 1
- JLGLQAWTXXGVEM-UHFFFAOYSA-N triethylene glycol monomethyl ether Chemical compound COCCOCCOCCO JLGLQAWTXXGVEM-UHFFFAOYSA-N 0.000 description 1
- IMNIMPAHZVJRPE-UHFFFAOYSA-N triethylenediamine Chemical compound C1CN2CCN1CC2 IMNIMPAHZVJRPE-UHFFFAOYSA-N 0.000 description 1
- ITMCEJHCFYSIIV-UHFFFAOYSA-N triflic acid Chemical compound OS(=O)(=O)C(F)(F)F ITMCEJHCFYSIIV-UHFFFAOYSA-N 0.000 description 1
- WRECIMRULFAWHA-UHFFFAOYSA-N trimethyl borate Chemical compound COB(OC)OC WRECIMRULFAWHA-UHFFFAOYSA-N 0.000 description 1
- FLTJDUOFAQWHDF-UHFFFAOYSA-N trimethyl pentane Natural products CCCCC(C)(C)C FLTJDUOFAQWHDF-UHFFFAOYSA-N 0.000 description 1
- AZCCRNNBFOWIIL-UHFFFAOYSA-N trimethyl(propoxy)azanium Chemical compound CCCO[N+](C)(C)C AZCCRNNBFOWIIL-UHFFFAOYSA-N 0.000 description 1
- ZNEOHLHCKGUAEB-UHFFFAOYSA-N trimethylphenylammonium Chemical compound C[N+](C)(C)C1=CC=CC=C1 ZNEOHLHCKGUAEB-UHFFFAOYSA-N 0.000 description 1
- ODHXBMXNKOYIBV-UHFFFAOYSA-N triphenylamine Chemical compound C1=CC=CC=C1N(C=1C=CC=CC=1)C1=CC=CC=C1 ODHXBMXNKOYIBV-UHFFFAOYSA-N 0.000 description 1
- YFTHZRPMJXBUME-UHFFFAOYSA-N tripropylamine Chemical compound CCCN(CCC)CCC YFTHZRPMJXBUME-UHFFFAOYSA-N 0.000 description 1
- 229930195735 unsaturated hydrocarbon Natural products 0.000 description 1
- NQPDZGIKBAWPEJ-UHFFFAOYSA-N valeric acid Chemical compound CCCCC(O)=O NQPDZGIKBAWPEJ-UHFFFAOYSA-N 0.000 description 1
- 229910052720 vanadium Inorganic materials 0.000 description 1
- GPPXJZIENCGNKB-UHFFFAOYSA-N vanadium Chemical compound [V]#[V] GPPXJZIENCGNKB-UHFFFAOYSA-N 0.000 description 1
- 239000010457 zeolite Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07F—ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
- C07F9/00—Compounds containing elements of Groups 5 or 15 of the Periodic Table
- C07F9/02—Phosphorus compounds
- C07F9/547—Heterocyclic compounds, e.g. containing phosphorus as a ring hetero atom
- C07F9/6564—Heterocyclic compounds, e.g. containing phosphorus as a ring hetero atom having phosphorus atoms, with or without nitrogen, oxygen, sulfur, selenium or tellurium atoms, as ring hetero atoms
- C07F9/6568—Heterocyclic compounds, e.g. containing phosphorus as a ring hetero atom having phosphorus atoms, with or without nitrogen, oxygen, sulfur, selenium or tellurium atoms, as ring hetero atoms having phosphorus atoms as the only ring hetero atoms
- C07F9/65688—Heterocyclic compounds, e.g. containing phosphorus as a ring hetero atom having phosphorus atoms, with or without nitrogen, oxygen, sulfur, selenium or tellurium atoms, as ring hetero atoms having phosphorus atoms as the only ring hetero atoms the ring phosphorus atom being part of a phosphonium compound
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D233/00—Heterocyclic compounds containing 1,3-diazole or hydrogenated 1,3-diazole rings, not condensed with other rings
- C07D233/54—Heterocyclic compounds containing 1,3-diazole or hydrogenated 1,3-diazole rings, not condensed with other rings having two double bonds between ring members or between ring members and non-ring members
- C07D233/56—Heterocyclic compounds containing 1,3-diazole or hydrogenated 1,3-diazole rings, not condensed with other rings having two double bonds between ring members or between ring members and non-ring members with only hydrogen atoms or radicals containing only hydrogen and carbon atoms, attached to ring carbon atoms
- C07D233/58—Heterocyclic compounds containing 1,3-diazole or hydrogenated 1,3-diazole rings, not condensed with other rings having two double bonds between ring members or between ring members and non-ring members with only hydrogen atoms or radicals containing only hydrogen and carbon atoms, attached to ring carbon atoms with only hydrogen atoms or radicals containing only hydrogen and carbon atoms, attached to ring nitrogen atoms
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07F—ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
- C07F5/00—Compounds containing elements of Groups 3 or 13 of the Periodic Table
- C07F5/02—Boron compounds
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07F—ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
- C07F5/00—Compounds containing elements of Groups 3 or 13 of the Periodic Table
- C07F5/02—Boron compounds
- C07F5/022—Boron compounds without C-boron linkages
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B1/00—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors
- H01B1/06—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors mainly consisting of other non-metallic substances
- H01B1/12—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors mainly consisting of other non-metallic substances organic substances
- H01B1/122—Ionic conductors
Definitions
- the present invention relates to an ionic compound, and more specifically, an ionic compound having a tetracyanoborate anion and a method for producing the ionic compound, an ion conductive material using the same, an electrolytic solution containing the same, and an electricity provided with the material It relates to chemical elements.
- Ionic compounds are used in ion conductors such as various types of batteries by ion conduction.
- batteries having charging and discharging mechanisms such as primary batteries, lithium (ion) secondary batteries, and fuel cells, electrolytic capacitors, It is used in electrochemical devices such as double layer capacitors, lithium ion capacitors, solar cells, and electrochromic display elements.
- electrochemical devices are generally composed of a pair of electrodes and an ionic conductor formed therebetween.
- Examples of the ion conductor include an electrolytic solution and a solid electrolyte, and an electrolyte dissolved in an organic solvent, a polymer compound, or a mixture thereof is used.
- the electrolyte dissolves, dissociates into a cation and an anion, and exhibits ionic conductivity.
- Batteries using such ionic conductors are used in portable electronic products such as laptop and palmtop computers, mobile phones, and video cameras. With the spread of these, the need for light and powerful batteries is necessary. Sex is increasing. Also, from the viewpoint of environmental problems, the development of secondary batteries having a longer life is becoming increasingly important.
- lithium hexafluorophosphate (LiPF 6 ) and lithium tetrafluoroborate (LiBF 4 ), which are electrolyte salts, and cyanoborate having an alkali metal or an organic cation have been proposed.
- the ionic compound containing cyanoborate as an anionic component has various properties as an ionic liquid, that is, it is liquid even at room temperature, and exhibits thermal, physical and electrochemical stability. Application to is being studied.
- a compound containing tetracyanoborate (TCB: [B (CN) 4 ] ⁇ ) is synthesized by reacting a boron-containing compound with an alkali metal cyanide (Z. Anorg. Allg. Chem. 2000, vol. 626, p. 560-568), a method in which the above reaction is performed in the presence of a lithium halide such as LiCl (Japanese Patent Publication No. 2006-517546), KBF 4 , LiBF 4 and BF 3 A method of reacting a boron compound such as OEt 2 with trimethylsilylcyanide (Z. Anorg. Allg. Chem. 2003, vol.
- the alkali metal cyanide has low reactivity with the boron compound, it is necessary to react under a high temperature condition near 300 ° C. or excessive use of the alkali metal cyanide. There are problems such as high equipment cost for introducing durable equipment and easy generation of impurities. On the other hand, trimethylsilylcyanide is expensive, and the yield of the product is low, and the salt of tetracyanoborate and trimethylsilane is unstable and easily decomposes by heating.
- reducing impure ionic components contained in the ionic compound when using an ionic compound in an electrochemical device as described above, from the viewpoint of ensuring good ionic conductivity and preventing corrosion of peripheral members, etc., reducing impure ionic components contained in the ionic compound. Is required.
- a compound containing a cyanoborate anion described in the above document when used as an electrolyte of an electrolyte solution of the electrochemical device, it is essential to reduce cyanide ions (CN ⁇ ), halide ions and metal ions. It becomes.
- the present invention has been made by paying attention to the above-mentioned circumstances, and its purpose is to include tetracyanoborate under mild conditions, in a higher yield than conventional methods, and at a lower cost. It is to provide a method for producing an ionic compound and an ionic compound containing tetracyanoborate with a reduced content of impure components.
- the ionic compound of the present invention that has solved the above problems is that the content of impurities containing fluorine atoms is 3 mol% or less with respect to 100 mol% of the ionic compound represented by the following general formula (I). Has characteristics.
- Kt m + represents an organic cation [Kt b ] m + or an inorganic cation [Kt a ] m +
- m represents an integer of 1 to 3
- the content of impurities containing fluorine atoms (F atoms) has been reduced to an extremely low level, so that the ionicity caused by impurities having F atoms or F atoms derived from the raw material Deterioration of various properties of the compound is difficult to occur.
- the ionic compound preferably has a silicon (Si) content in the ionic compound of 2500 ppm or less.
- the CN - content is preferably 3000 ppm or less
- the halide ion content is 500 ppm or less
- the water content is preferably 3000 ppm or less.
- An ion conductive material comprising the above ionic compound is a preferred embodiment of the present invention.
- the production method of the present invention is a method for producing an ionic compound represented by the above general formula (I), and is characterized by reacting a starting material containing a cyanide and a boron compound.
- the starting material contains trimethylsilyl cyanide as a cyanide and further contains an amine and / or an ammonium salt, and as the cyanide, M a (CN) n (M a is , Zn 2+ , Ga 3+ , Pd + , Sn 2+ , Hg 2+ , Rh 2+ , Cu 2+ and Pb + , and n is an integer of 1 to 3)
- M a is , Zn 2+ , Ga 3+ , Pd + , Sn 2+ , Hg 2+ , Rh 2+ , Cu 2+ and Pb +
- n is an integer of 1 to 3
- R 4 NCN R is H or an organic group
- the ionic compound represented by the general formula (I) can be produced under mild reaction conditions, or the ionic compound can be obtained with high yield.
- the production method of the present invention preferably further includes a step of bringing the crude product obtained by reacting the starting material with an oxidizing agent, and the oxidizing agent is preferably hydrogen peroxide. .
- the ionicity having tetracyanoborate ions ([B (CN) 4 ] ⁇ ) is obtained in a lower yield or at a lower cost under milder conditions than in the prior art.
- Compounds can be produced. Therefore, industrial production of the ionic compound of the present invention is also possible.
- the peripheral member can be used even when it is used for various applications such as an electrolytic solution and an electrochemical device. Stable characteristics (thermal, physical, electrochemical characteristics, etc.) can be exhibited without causing problems such as corrosion.
- the ionic compound of the present invention is an ionic compound represented by the following general formula (I), and the content of impurities containing fluorine atoms is 3 mol% or less with respect to 100 mol% of the ionic compound. However, it has characteristics.
- [Kt] m + represents an inorganic cation [Kt a ] m + or an organic cation [Kt b ] m + , and m represents an integer of 1 to 3).
- the present inventors have repeatedly studied the characteristics of the ionic compound such as heat resistance and electrochemical characteristics, and found that the amount of impurities derived from F atoms is greatly involved in the deterioration of the characteristics of the ionic compound. As a result of further investigations on ionic compounds that are less likely to cause such characteristic deterioration, if the content of impurities containing F atoms is 3 mol% or less with respect to 100 mol% of the ionic compound, tetracyanoborate ions are added. The inventors have found that the excellent characteristics of an ionic compound as an anion can be fully enjoyed, thereby completing the present invention.
- impurities containing F atoms include free F atoms derived from the starting material of the ionic compound and BF x (CN) 4-x (x is a by - product during the synthesis of the ionic compound). Represents an integer of 1 to 3), and includes compounds containing F atoms such as compounds containing BF 3 and BF 4 anions.
- These impurities are preferably not contained in the ionic compound as the target compound, but it is more preferred not to include a compound group having a free F atom and a BF bond. In particular, it is desirable that a compound having a BF bond is not included in the ionic compound of the present invention.
- the ionic compound contains more than 3 mol% of F atoms or impurities containing F atoms, hydrogen fluoride gas is generated and corrosion occurs on the peripheral members of various electrochemical devices.
- the ionic compound of the present invention is most preferably free of impurities containing F atoms (0 mol%), but if the amount of impurities containing F atoms is 0.0001 mol% or more, the characteristics of the ionic compound In addition, even if the amount is 0.001 mol% or more, a remarkable deterioration in characteristics is hardly observed.
- the content of impurities contained in the ionic compound of the present invention can be calculated from, for example, an NMR spectrum. Specifically, first, an 11 B-NMR spectrum of the ionic compound of the present invention is measured. Next, the integrated value of the peak of the target B (CN) 4 is 100 mol%, and this is compared with the integrated value of the impurity peak containing the BF bond, whereby the impurity content can be calculated. In addition, if a 19 F-NMR spectrum is measured by the same method, the amount of free F atoms and F-containing compounds can also be measured. In addition, the calculation method of impurity content is not limited to the said method, Other methods are employable.
- ionic species including F atoms and free F atoms can be quantified. Therefore, the number of moles of B (CN) 4 compound is determined from the total mass of the ionic compound, and ion chromatography is performed. Examples of the method include calculating the content mass of F anion by a graph and converting it to the number of moles.
- the ionic compound of the present invention represented by the above general formula (I) is a compound represented by the above general formula (I), which is obtained by a reaction between trimethylsilyl cyanide (TMSCN) and a boron compound.
- TMSCN trimethylsilyl cyanide
- a high-purity ionic compound having a silicon (Si) content of 2500 ppm or less in the ionic compound is preferable.
- Si contained in the ionic compound is derived from a starting material when the ionic compound is synthesized (see the production method of the present invention described later).
- the ion conductivity may be lowered when it is used in an electrolyte solution. Therefore, it is desirable to reduce and remove impure components as much as possible. Therefore, the Si content in the ionic compound is more preferably 1000 ppm or less, and even more preferably 500 ppm or less.
- the high-purity ionic compound of the present invention preferably has a low cyanide ion (CN ⁇ ) content in addition to the Si.
- the preferred cyanide ion content is 3000 ppm or less.
- Cyanide ions may react with the electrode and reduce ionic conductivity. More preferably, it is 1000 ppm or less, More preferably, it is 500 ppm or less.
- the high-purity ionic compound of the present invention preferably has a low content of halide ions.
- content of halide ions refers to the total concentration of halide ions of F ⁇ , Cl ⁇ , Br ⁇ and I ⁇ .
- halide ions react with the electrode material to corrode the electrode material, and when hydrogen ions are present in the system, the pH of the electrolyte is lowered to dissolve the electrode material. In either case, the performance of the electrochemical device is degraded.
- the amount of halide ions in the ionic compound is preferably as small as possible.
- the halide ion content in the ionic compound is 500 ppm or less, more preferably 100 ppm or less, and even more preferably 30 ppm or less.
- the content of F ⁇ and Cl ⁇ is preferably within the above range, and the content of Cl ⁇ is particularly preferably within the above range. preferable.
- the amount of water (water concentration) contained in the ionic compound of the present invention is preferably 3000 ppm or less. Water remaining in the ionic compound is electrolyzed, and the generated hydrogen ions are combined with the halide ions to form hydrogen halide. In the electrolytic solution, since hydrogen ions and halide ions are dissociated and exist, the pH of the electrolytic solution is lowered (acidic). As a result, the electrode material is dissolved by the acidic component generated in the electrolytic solution, and the performance of the electrochemical device is degraded. Therefore, the smaller the amount of water contained in the ionic compound, the better, more preferably 1000 ppm or less, and even more preferably 500 ppm or less.
- the ionic compound of the present invention represented by the above general formula (I) has a low content of impure ions caused by starting materials and impurities inevitably mixed in the synthesis process. Therefore, when the ionic compound of the present invention is used as an ionic conductor for various electrochemical devices, a highly reliable electrochemical device in which the ionic conductivity is not lowered and the peripheral members are hardly corroded can be obtained.
- any of the conventionally known measurement methods can be used to measure the content of impurities such as Si, halide ions and moisture.
- impurities such as Si, halide ions and moisture.
- atomic absorption spectrometry, ICP emission spectroscopy (high frequency induction) examples thereof include coupled plasma emission spectroscopy and ion chromatography.
- the ionic compound of the present invention is a compound comprising an organic or inorganic cation [Kt] m + and a tetracyanoborate anion [B (CN) 4 ] ⁇ as represented by the general formula (I).
- the cation [Kt] m + include an organic cation [Kt b ] m + such as an onium cation, Li + , Na + , Mg 2+ , K + , Ca 2+ , Zn 2+ , Ga 3+ , Pd 2+ and Sn.
- Inorganic cations [Kt a ] m + such as 2+ , Hg 2+ , Rh 2+ , Cu 2+ and Pb + can be mentioned.
- [Kt] m + is an onium cation or a Li cation are preferable because they can be easily dissolved in an organic solvent and used as a non-aqueous electrolyte.
- onium cation those represented by the following general formula (II) are preferable.
- L represents C, Si, N, P, S or O
- R represents the same or different organic group, which may be bonded to each other
- s is the number of R bonded to L.
- S (valence of L) + 1 ⁇ (number of double bonds directly bonded to L), which is an integer of 2 to 4.
- the valence of L is 2 when L is S or O, 3 when L is N or P, and 4 when L is C or Si.
- the “organic group” represented by R means a group having at least one hydrogen atom, fluorine atom, or carbon atom.
- the “group having at least one carbon atom” only needs to have at least one carbon atom, and may have another atom such as a halogen atom or a hetero atom, a substituent, or the like. Good.
- the substituent include amino group, imino group, amide group, ether bond group, thioether bond group, ester group, hydroxyl group, alkoxy group, carboxyl group, carbamoyl group, cyano group, disulfide group, nitro group. Group, nitroso group, sulfonyl group and the like.
- L is N, P, S or O.
- an onium cation wherein L is N.
- the said onium cation may be used independently and may use 2 or more types together.
- onium cations represented by the following general formulas (III) to (VI) are preferable.
- At least one of 14 types of heterocyclic onium cations represented by:
- R 1 to R 8 are the same as those exemplified for the general formula (II). More specifically, R 1 to R 8 are a hydrogen atom, a fluorine atom, or an organic group. Examples of the organic group include linear, branched, or cyclic (provided that R 1 to R 8 are bonded to each other to form a ring). Are preferably a hydrocarbon group having 1 to 18 carbon atoms or a fluorine group, more preferably a hydrocarbon group having 1 to 8 carbon atoms or a fluorine group, More preferred are hydrocarbon groups and fluorocarbon groups having 1 to 9 carbon atoms. Moreover, the organic group may contain the substituent illustrated about the said general formula (II), hetero atoms, such as nitrogen, oxygen, and a sulfur atom, and a halogen atom.
- hetero atoms such as nitrogen, oxygen, and a sulfur atom, and a halogen atom.
- At least one of nine types of saturated ring onium cations represented by the formula:
- R 1 to R 12 are the same or different and are an organic group and may be bonded to each other.
- R 1 to R 4 represented by the above are the same or different organic groups.
- the chain onium cation (V) includes tetramethylammonium, tetraethylammonium, tetrapropylammonium, tetrabutylammonium, tetraheptylammonium, tetrahexylammonium, tetraoctylammonium, triethylmethylammonium, methoxyethyldiethylmethylammonium, Quaternary ammoniums such as trimethylphenylammonium, benzyltrimethylammonium, benzyltributylammonium, benzyltriethylammonium, dimethyldistearylammonium, diallyldimethylammonium, 2-methoxyethoxymethyltrimethylammonium and tetrakis (pentafluoroethyl) ammonium, trimethylammonium , Triethyl ammo Tertiary ammoniums such
- an onium cation containing a nitrogen atom is more preferred, and more preferred are quaternary ammonium and imidazolium, and particularly preferred are the following general formulas:
- chain quaternary ammonium such as tetraethylammonium, tetrabutylammonium and triethylmethylammonium
- chain tertiary quaternary ammonium such as triethylammonium, dibutylmethylammonium and dimethylethylammonium
- 1-ethyl-3 -Imidazolium such as methyl imidazolium and 1,2,3-trimethylimidazolium
- pyrrolidinium such as N, N-dimethylpyrrolidinium and N-ethyl-N-methylpyrrolidinium are particularly preferred because they are readily available.
- the ionic compound of the present invention has excellent physical properties such as heat resistance, electrical conductivity, and voltage resistance. Although these physical property values are slightly different depending on the type of cation Kt m + constituting the ionic compound, the ionic compound of the present invention has a withstand voltage of +2.0 V or more by measuring the potential window described later. Indicates.
- the method for producing an ionic compound of the present invention is characterized in that an ionic compound represented by the above general formula (I) is produced by reacting a starting material containing a cyanide and a boron compound.
- the first cyanide M a (CN) n and a boron compound are reacted to obtain an ionic compound represented by the above general formula (I).
- a second production method in which an ammonium cyanide compound and a boron compound are reacted a third production method in which trimethylsilyl cyanide (TMSCN) is reacted with an amine and / or an ammonium salt and a boron compound, And the 4th manufacturing method of making hydrogen cyanide (HCN), an amine, and a boron compound react is included.
- the method for producing an ionic compound of the present invention is a method for producing an ionic compound having a tetracyanoborate ion represented by the following general formula (I), wherein M a (CN) n (M a is Zn 2 + , Ga 3+ , Pd 2+ , Sn 2+ , Hg 2+ , Rh 2+ , Cu 2+ and Pb + , and n is an integer of 1 to 3) and a boron compound It is characterized by the reaction of the starting raw materials.
- [Kt] m + represents an organic cation [Kt b ] m + or an inorganic cation [Kt a ] m +
- m represents an integer of 1 to 3
- the present inventors have replaced the alkali metal cyanide such as potassium cyanide (KCN) conventionally used as a starting material with a specific metal ion (Zn 2+ ,
- KCN potassium cyanide
- Zn 2+ a specific metal ion
- cyanide M a (CN) n containing any one of Ga 3+ , Pd 2+ , Sn 2+ , Hg 2+ , Rh 2+ , Cu 2+ and Pb + .
- a cyanide of a metal cation having a low energy level between HOMO and 2nd HOMO that is, a metal cation classified as a soft metal cation based on the HSAB rule may be used. This is because by using the cyanide of the specific metal cation, the reaction proceeds more rapidly than in the case of using an alkali metal cyanide.
- the reason why the metal cation is preferable is not clear, but the present inventors consider as follows.
- alkali metal ions are classified as hard cations, and specific metals contained in the cyanide according to the present invention are classified as soft cations.
- the product tetracyanoborate anion (TCB) is classified as a soft anion. Since the combination of a soft acid and a base easily forms a stable ionic compound, the present invention is more effective than the alkali metal cyanides conventionally used such as hard cations such as Li + , Na + and K +. It is considered that the reaction of cyanide related to the above easily proceeded.
- a B (CN) 4 compound having a low impurity content can be obtained with high yield.
- cyanides M a (CN) n , Zn (CN) 2 , Ga (CN) 3 , Pd (CN) 2 , Sn (CN) 2 , Hg (CN) 2 and Cu (CN) 2 are preferable. It is at least one selected from the group consisting of:
- the boron compound is not particularly limited as long as it contains boron.
- M c BX c 4 M c represents a hydrogen atom or an alkali metal atom
- X c represents a hydrogen atom, a hydroxyl group or a halogen atom, the same shall apply hereinafter
- BX c 3 , BX c 3 -complex B (OR 13 ) 3 (R 13 represents a hydrogen atom or an alkyl group; the same shall apply hereinafter)
- B (OR 13 ) 3 -complex Na 2 B 4 O 7 , ZnO.B 2 O 3 and NaBO 3 It is preferably at least one selected from the group consisting of:
- BX c 4 HBF 4 , KBF 4, KBBr 4, NaB (OH) 4, KB (OH) 4, LiB (OH) 4, LiBF 4, NaBH 4 and the like
- BX c 3 is , BH 3 , B (OH) 3 , BF 3 , BCl 3 , BBr 3 , BI 3 and the like.
- Examples of the BX c 3 -complex include ethers such as diethyl ether, tripropyl ether, tributyl ether, tetrahydrofuran, Ammonia, methylamine, ethylamine, butylamine, hexylamine, octylamine, dimethylamine, diethylamine, dibutylamine, dihexylamine, dicyclohexylamine, trimethylamine, triethylamine, tributylamine, triphenylamine, guanidine, aniline, morpholine, pyrrolidine, methylpyrrolidine Amines such as When a complex of the BX c 3, as the B (OR 13) 3, boric acid, boron compounds having an alkoxy group having 1 to 10 carbon atoms.
- NaBH 4 , BH 3 , BF 3 , BCl 3 , BBr 3 , B (OMe) 3 , B (OEt) 3 , Na 2 B 4 O 7 , and B (OH) 3 are relatively highly reactive.
- BF 3 , BCl 3 , BBr 3, etc. such as BX c 3 where X c is a halogen atom, B (ORe) 3 , B (OEt) 3, etc., B (OR 13 ) 3 is more preferred, and most preferred are BCl 3 , B (OMe) 3 and B (OEt) 3 .
- the said boron compound may be used independently and may be used in combination of 2 or more type. Note that, from the viewpoint of reducing the amount of impurities derived from F, it is recommended to employ a boron compound that does not contain F atoms among the boron compounds.
- Examples of the cation [Kt] m + constituting the ionic substance KtX b include organic cations [Kt b ] m + such as an onium cation, Li + , Na + , Ca 2+ , K + , Zn 2+ , Ga 3+ , Examples thereof include inorganic cations [Kt a ] m + such as Pd 2+ , Sn 2+ , Hg 2+ , Rh 2+ , Cu 2+ and Pb + .
- the above-described onium cations of the general formulas (III) to (V) are particularly preferable as [Kt b ] m + constituting the ionic substance according to the present invention.
- the blending ratio of the starting materials is preferably 1: 1 to 100: 1 (cyanide M a (CN) n : boron compound, molar ratio).
- the ratio is more preferably 1: 1 to 50: 1, further preferably 1: 1 to 20: 1, and still more preferably 1: 1 to 10: 1.
- the amount of cyanide M a (CN) n is too small, the production amount of the target ionic compound may be reduced or by-products (eg, tricyanoborate, dicyanoborate, etc.) may be produced.
- the amount is too large, the amount of impurities derived from CN tends to increase, making it difficult to purify the target product.
- the mixing ratio of the ionic substance, relative to the boron compound from 100: 1 to 1: 100: for (ionic substance boron compound, mol ratio) Is preferred. More preferably, it is 50: 1 to 1:50, and further preferably 20: 1 to 1:20. If the amount of the ionic substance is too small, the amount of the desired ionic compound produced will be small, while if too large, the amount of impurities derived from the ionic substance will increase, making it difficult to purify the target product. Sometimes.
- reaction solvent in order to allow the reaction to proceed uniformly.
- the reaction solvent is not particularly limited as long as the above starting materials are soluble, and water or an organic solvent is used.
- organic solvent include hydrocarbon solvents such as toluene, xylene, benzene and hexane, chlorine solvents such as chloroform and dichloromethane, ether solvents such as diethyl ether, cyclohexyl methyl ether, dibutyl ether, dimethoxyethane, dioxane, and acetic acid.
- Ester solvents such as ethyl and butyl acetate, ketone solvents such as 2-butanone and methyl isobutyl ketone, alcohol solvents such as methanol, ethanol, 2-propanol and butanol, acetonitrile, tetrahydrofuran, ⁇ -butyrolactone, dimethyl sulfoxide, dimethyl And formamide.
- the said reaction solvent may be used independently and may mix and use 2 or more types.
- the conditions for reacting the above starting materials are not particularly limited and may be appropriately adjusted according to the progress of the reaction.
- the reaction temperature is preferably 0 ° C. to 200 ° C. More preferably, it is 20 ° C to 150 ° C, and further preferably 50 ° C to 130 ° C.
- the reaction time is preferably 0.2 hours to 200 hours, more preferably 0.5 hours to 150 hours, and even more preferably 1 hour to 100 hours.
- the starting material contains an ionic substance KtX b ([Kt] m + represents an onium cation [Kt b ] m + or the inorganic cation [Kt a ] m + )
- the ionic compound Kt a [B (CN) 4 ] m ([K t a ] m + is a cation exchange by reacting the metal cation [M a ] n + ) of cyanide with the ionic substance KtX b
- the ionic compound Kt [B (CN) 4 ] m having the desired onium cation or inorganic cation is obtained.
- the cation exchange reaction with the ionic substance will be described later.
- the cyanide M a (CN) n and a boron compound are reacted to form the ionic compound Kt a [B (CN) 4 ] m ([Kt a ] m + is an embodiment for producing the metal cation [M a ] n + ) of the cyanide; Kt a [B (CN) 4 ] m is obtained by reacting the metal cyanide M a (CN) n with a boron compound.
- Kt [B (CN) 4] m ([Kt m + is onium cation [Kt b] m +, or aspects for manufacturing the inorganic cation [Kt a] m +): includes three aspects. Therefore, the ionic compound Kt m + [ ⁇ B (CN) 4 ⁇ ⁇ ] m of the present invention obtained by the first production method includes a case where [Kt] m + is an onium cation [Kt b ] m + and an inorganic cation. [Kt a ] Both of m + cases are included.
- the production method of the second ionic compound of the present invention is an ion represented by the following general formula (I) by reacting an ammonium cyanide compound represented by the following general formula (VI) with a boron compound. It has the characteristic in the place which obtains a sex compound.
- N—R is a saturated bond and / or an unsaturated bond
- t represents the number of R bonded to N
- t 4- (the number of double bonds bonded to N)
- R independently represents a hydrogen atom or an organic group, and two or more of these may be bonded.
- the present inventors use an ammonium cyanide compound instead of a conventionally used alkali metal cyanide such as potassium cyanide as a cyan (CN) source.
- a conventionally used alkali metal cyanide such as potassium cyanide
- the ionic compound represented by the general formula (I) can be obtained at a lower reaction temperature and in a high yield.
- ammonium cyanide compound As a cyan source, the present inventors consider the reason why the reaction proceeds under mild conditions as compared with the conventional method and the product can be obtained in high yield. Yes.
- the bond between the alkali metal ion and the cyano group (CN) is strong.
- ammonium-based cyanide has a steric hindrance in the positively charged N atom, so that the cyanide ion hardly approaches the N atom, and the bond between CN and N atom is relatively weak.
- the organic cation [Kt] m + constituting the ionic compound Kt [B (CN) 4 ] m obtained by the present invention and the second production method is derived from the cation constituting the ammonium cyanide compound.
- an ammonium cyanide compound [N— (R) t ] CN is used as a starting material.
- an ammonium cyanide compound as a CN source for the TCB synthesis reaction, tetracyanoborate [B (CN) 4 , even under reaction conditions in which the target product was not obtained when an alkali metal cyanide was used as a starting material.
- An ionic compound having — can be obtained.
- N + -(R) t N
- the bond between N—R is a saturated bond and / or an unsaturated bond
- t N
- Represents the number of Rs bonded, represented by t 4- (number of double bonds directly bonded to N), and represents an integer of 3 to 4
- R represents a hydrogen atom or an organic group independently of each other. Furthermore, two or more R may be bonded.
- the “organic group” includes the same ones as exemplified with respect to the general formula (II).
- R may be bonded to N which is a central element of ammonium via a carbon atom constituting the main skeleton of the organic group R, and may be bonded to another atom other than carbon or the above substituent. May be combined with N. Further, when two or more organic groups R are bonded, the bond may be a bond between a carbon atom constituting the main skeleton of the organic group R or other atoms, and the carbon atom and the organic group R may be organic. It may be a substituent that the group R has, or a bond between substituents that each of two or more Rs have.
- Preferred examples of the ammonium [N + -(R) t ] having an organic group R include those having structures represented by the following general formulas (VII) to (IX).
- R 1 to R 12 each independently represent a hydrogen atom or an organic group, and two or more R may be bonded to each other. .
- R 1 to R 4 constituting the alkylammonium derivative are each independently a hydrogen atom or an organic group.
- examples of the alkylammonium derivative (IV) include ammoniums and ammonium compounds exemplified as the chain onium cation (V).
- ammoniums (VII) to (IX) are those having structures represented by the following six general formulas because of their availability.
- R 1 to R 12 are a hydrogen atom, a fluorine atom, or an organic group, and examples of the organic group include the same as those exemplified with respect to the general formula (III).
- salts of chain quaternary ammonium such as tetrabutylammonium cyanide, tetraethylammonium cyanide and triethylmethylammonium cyanide and cyanide ions
- triethylammonium cyanide Salts of chain tertiary ammonium such as dibutylmethylammonium cyanide and dimethylethylammonium cyanide and cyanide ions
- salts of pyrrolidinium and cyanide ions such as N, N-dimethylpyrrolidinium cyanide and N-ethyl-N-methylpyrrolidinium cyanide are readily available Is Because especially preferred.
- the ammonium cyanide-based compound may contain a single ammonium, or a mixture of two or more different ammonium cyanide-based compounds may be used.
- the ammonium cyanide-based compound includes a compound represented by the following general formula (X), a metal cyanide L p + [(CN) ⁇ ] n (L p + represents a metal cation, and p is 1 to 4, preferably 1 or 2).
- [N + -(R) t ] corresponds to the ammonium cation of the ammonium cyanide compound.
- the compound (X) include tetrabutylammonium sulfoxide, tetraethylammonium chloride, triethylammonium chloride and 1-ethyl-3-methylimidazolium bromide.
- L p + represents an alkali metal ion, an alkaline earth metal ion, Zn 2+ , Cu + , Cu 2+ , Pd 2+ , Au + , Ag + , Al 3+ , Ti 4+ , Fe 3+ and Ga 3+ are represented, and alkali metal ions, alkaline earth metal ions, Zn 2+ , Cu + , Cu 2+ and Ag + are more preferable.
- Specific examples of the metal cyanide include KCN, LiCN, NaCN, Mg (CN) 2 , Ca (CN) 2 , Zn (CN) 2 , CuCN, and Cu (CN) 2 .
- the compounding ratio of the compound (X) to the metal cyanide is preferably 40: 1 to 1:40 (compound (X): metal cyanide, molar ratio), more preferably 20: 1 to 1:20. And more preferably 10: 1 to 1:10.
- the reaction conditions are not particularly limited.
- the reaction temperature is preferably 0 ° C. to 150 ° C., more preferably 20 ° C. to 100 ° C., and the reaction time is 0.01 hours to 20 hours. And more preferably 0.05 hours to 5 hours.
- the reaction solvent may or may not be used.
- reaction solvents For example, diethyl ether, dibutyl ether, tetrahydrofuran, dioxane, dichloromethane, chloroform, carbon tetrachloride, ethyl acetate, butyl acetate, acetone, 2-butanone, methyl isobutyl ketone , Acetonitrile, benzonitrile, dimethoxyethane and water can be exemplified as preferred reaction solvents. These reaction solvents may be used alone or in combination of two or more. In addition, it is one of the preferable conditions of the said reaction to use 2 or more types of reaction solvent.
- the ionic compound represented by the general formula (I) is synthesized by reacting the starting material containing the ammonium cyanide compound and the boron compound.
- the boron compound is not particularly limited as long as it is a compound containing boron, and the same one as in the first production method can be used.
- the blending ratio of the above starting materials is preferably 50: 1 to 4: 1 (ammonium cyanide compound: boron compound, molar ratio). More preferably, it is 20: 1 to 4: 1, and more preferably 10: 1 to 4: 1. If the compounding amount of the ammonium cyanide compound is too small, the production amount of the target ionic compound may be reduced, and by-products (for example, tricyanoborate, dicyanoborate, etc.) may be produced. The amount of impurities derived from CN tends to increase, making it difficult to purify the target product.
- reaction solvent in order to allow the reaction to proceed uniformly.
- the reaction solvent is not particularly limited as long as the above starting materials are soluble, and water or an organic solvent is used.
- organic solvent the same thing as the said 1st manufacturing method can be used. Of these, hydrocarbon solvents, ether solvents and ester solvents are preferred.
- the said reaction solvent may be used independently and may mix and use 2 or more types.
- the conditions for reacting the above starting materials are not particularly limited and may be appropriately adjusted according to the progress of the reaction.
- the reaction temperature is preferably 30 ° C. to 200 ° C. More preferably, it is 50 ° C to 170 ° C, and further preferably 80 ° C to 150 ° C.
- the reaction time is preferably 0.2 hours to 200 hours, more preferably 0.5 hours to 150 hours, and even more preferably 1 hour to 100 hours.
- tetracyanoborate ions [B ( An ionic compound having CN) 4 ] ⁇ ) can be obtained.
- the third production method of the ionic compound of the present invention is an ionic property represented by the following general formula (I) by reacting trimethylsilylcyanide (TMSCN), an amine and / or ammonium salt, and a boron compound. It is characterized by obtaining a compound.
- [Kt] m + represents an organic cation [Kt b ] m + or an inorganic cation [Kt a ] m +
- m represents an integer of 1 to 3
- the present inventors used trimethylsilyl cyanide instead of a conventionally used alkali metal cyanide such as potassium cyanide as a cyan (CN) source, It was found that by reacting with a boron compound in the presence of an amine and / or an ammonium salt, the ionic compound represented by the general formula (I) can be obtained in good yield.
- a conventionally used alkali metal cyanide such as potassium cyanide
- an ionic compound composed of a trimethylsilyl cation and TCB is very unstable and easily decomposed.
- the trimethylsilyl cation is rapidly exchanged with the ammonium cation, it is considered that an ionic compound containing TCB can be obtained stably.
- the detailed reason is unknown, it is considered that when an amine is used, the amine captures protons generated from the starting materials and intermediate products and generates an ammonium compound in the system. As a result, it is presumed that an ionic compound containing a stable TCB can be obtained as in the case of using an ammonium salt.
- the TCB production reaction proceeds rapidly and an ionic compound is produced.
- the method of the present invention performs the above reaction in the presence of an amine and / or an ammonium salt, so that an ionic compound having ammonium as a cation can be obtained in one step.
- trimethylsilylcyanide is used as a starting material.
- trimethylsilylcyanide as the CN source for the TCB synthesis reaction, tetracyanoborate [B (CN) 4 ] ⁇ even under reaction conditions in which it was difficult to obtain the target product when an alkali metal cyanide was used as a starting material.
- the ionic compound which has can be obtained.
- TMSCN trimethylsilylcyanide
- a commercially available product may be used, or a product synthesized by a known method may be used.
- the method for synthesizing TMSCN is not particularly limited, but for example, a method using a starting material containing a compound having a trimethylsilyl group (TMS group) and hydrogen cyanide (HCN) is preferable because TMSCN can be synthesized at a lower cost.
- Examples of the compound having a TMS group include TMSX 1 (X 1 is OR, a halogen atom or a hydroxyl group), hexamethyldisilazane (TMS-NH-TMS), and the like.
- TMSX 1 X 1 is OR, a halogen atom or a hydroxyl group
- TMS-NH-TMS hexamethyldisilazane
- a method of reacting TMSX 1 (X 1 is a halogen atom) and hydrogen cyanide in the presence of an amine such as triethylamine see the following formula (XI-1), Stec, WJ et al., Synthesis. 1978: 154.
- a method of reacting hexamethyldisilazane with hydrogen cyanide see the formula (XI-2) below).
- TMSX 1 + HCN + Et 3 N ⁇ TMSCN + Et 3 NHX 1 (XI-1) TMS-NH-TMS + 2HCN
- hexamethyldisilazane can also act as an amine
- hexamethyldisilazane and a compound having a trimethylsilyl group may be used simultaneously (see the following formula (XI-3)). This is preferable because ammonia by-produced is trapped in the system and the problem of odor is suppressed.
- the mixing ratio of the raw materials is preferably such that the trimethylsilyl group and hydrogen cyanide (HCN) are 20: 1 to 1:20 (molar ratio), more preferably 10: 1 to 1:10, Preferably it is 5: 1 to 1: 5. That is, when hexamethyldisilazane is used, or when hexamethyldisilazane and a compound having a trimethylsilyl group are used in combination, the total amount of trimethylsilyl groups contained in the raw material and the amount of hydrogen cyanide are within the above ranges. What should I do.
- the reaction temperature is preferably ⁇ 20 ° C. to 100 ° C., more preferably 0 ° C. to 50 ° C., and the reaction time is 0.5 hour to 100 hours, more preferably 1 hour to 50 hours.
- a compound having a trimethylsilyl group is formed as a by-product (eg, TMSX 1 , TMS-O-TMS, etc., see formula (XI-4) below).
- TMSX 1 e.g., TMS-O-TMS, etc., see formula (XI-4) below.
- X 2 and X 3 represent OR, a halogen atom or a hydroxyl group
- TMSCN regenerated by reacting the compound TMSX 1 having a trimethylsilyl group by-produced with HCN may be used as a starting material. This is because TMSCN is expensive, and the production cost of the ionic compound can be reduced by recycling TMSX 1 which is a reaction byproduct.
- an ionic compound represented by the above general formula (I) is synthesized by reacting the above TMSCN, an amine and / or ammonium salt, and a starting material containing a boron compound.
- the boron compound is not particularly limited as long as it is a compound containing boron, and the same one as in the first production method can be used.
- the blending ratio of the starting material is preferably 3: 1 to 80: 1 (TMSCN: boron compound, molar ratio). More preferably, it is 4: 1 to 40: 1, and still more preferably 4: 1 to 20: 1. If the amount of TMSCN blended is too small, the amount of target ionic compound produced may be reduced or by-products (eg, tricyanoborate, dicyanoborate, etc.) may be produced. The amount of impurities tends to increase, making it difficult to purify the target product.
- the reaction between the TMSCN and the boron compound is performed in the presence of an amine and / or an ammonium salt.
- the amine becomes an ammonium salt in the reaction system, and the produced ammonium salt is exchanged with a trimethylsilyl cation of a TCB compound that uses trimethylsilyl separately generated in the reaction system as a cation, so that a stable ionic compound containing TCB is obtained.
- a good yield can be obtained.
- an amine and / or an ammonium salt are used, an ionic compound having ammonium as a cation component can be obtained in one step without performing a cation exchange reaction.
- the amine that can be used in the present invention is preferably an amine represented by the following general formula (XII).
- the bond between N—R is a saturated bond and / or an unsaturated bond
- u represents the number of R bonded to N
- u 3- (two bonded to N The number of heavy bonds)
- R independently represents a hydrogen atom, a fluorine atom, or an organic group
- R may be a bond of 2 or more to form a ring.
- Examples of the “organic group” include those exemplified with respect to the general formula (II).
- Examples of the amine represented by the general formula (XII) include amine compounds (XIII) and (XIV) having a saturated or unsaturated cyclic structure in which two or more R are bonded, and an amine compound (XV) in which R is a chain. Is mentioned.
- R 1 to R 3 are a hydrogen atom, a fluorine atom, or an organic group, and the organic group is exemplified with respect to the general formula (III). The thing similar to a thing is mentioned.
- Specific compounds represented by the above general formulas (XIII-1) to (XIII-3) include compounds represented by the general formula (XIII-1) such as pyrrole, pyrrolidine, piperidine and morpholine, -Compounds represented by general formula (XIII-2) such as diazabicyclo [2.2.2] octane (DABCO), compounds represented by general formula (XIII-3) such as hexamethylenetetramine, and derivatives thereof Etc.
- u is 2 and an amine compound having an unsaturated cyclic structure in which two Rs are bonded;
- Specific compounds represented by the general formula (XIV) include compounds having an amidine skeleton such as imidazole, imidazoline, pyrazole, triazole, pyrroline, diazabicyclononene (DBN), diazabicycloundecene (DBU), and the like. And derivatives thereof, pyridine, pyridazine, pyrimidine, pyrazine, and derivatives thereof.
- Examples of the amine compound represented by the general formula (XV-1) in which u is 3 include trimethylamine, triethylamine, tributylamine, tripropylamine, diethylmethylamine, dibutylmethylamine, dihexylmethylamine, dipropylamine and the like. Examples thereof include dialkylamines such as trialkylamine, dimethylamine, diethylamine, dibutylamine and dihexylamine, and monoalkylamines such as methylamine, ethylamine, butylamine, pentylamine, hexylamine and octylamine. Examples of the compound in which n is 2 and represented by the general formula (XV-2) include guanidine.
- chain amines such as triethylamine, tributylamine, butyldimethylamine, diethylamine, dibutylamine, butylamine, hexylamine, octylamine and guanidine
- Cyclic amines such as piperidine, 1,4-diazabicyclo [2.2.2] octane (DABCO), imidazoline, diazabicyclononene (DBN) and diazabicycloundecene (DBU), pyridine, imidazole, methylimidazole and pyrazine
- aromatic amines such as Among these, chain amines such as triethylamine and dibutylamine are preferable because they are highly basic and inexpensive.
- ammonium salts having an ammonium cation represented by the above general formulas (VII) to (IX) can be used.
- those having a quaternary ammonium as a cation are preferable.
- Those having at least one selected from the group consisting of compounds represented by the following general formulas (XVII-1) to (XVII-5) are preferred as the cation.
- R independently represents a hydrogen atom, a fluorine atom, or an organic group.
- Examples of the organic group represented by R in the above general formula include those similar to those exemplified with respect to the general formula (II).
- ammonium cations include ammonium, triethylmethylammonium, tetramethylammonium, tetraethylammonium, tetrabutylammonium, proton adduct of diazabicyclooctane, imidazolium, methylimidazolium, ethylmethylimidazolium, pyridinium, methylpyridinium.
- triethylmethylammonium, tetramethylammonium, tetraethylammonium, tetrabutylammonium, proton adduct of diazabicyclooctane, and ethylmethylimidazolium are preferable, triethylmethylammonium, tetramethylammonium, tetraethylammonium, Ethylmethylimidazolium is more preferred.
- Examples of the anion constituting the salt with the ammonium cation include halide ion, cyanide ion (CN ⁇ ), hydroxide ion (OH ⁇ ), cyanate ion (OCN ⁇ ), thiocyanate ion (SCN ⁇ ), alkoxy
- Examples thereof include ions (RO ⁇ ), sulfate ions, nitrate ions, acetate ions, carbonate ions, perchlorate ions, alkyl sulfate ions, and alkyl carbonate ions.
- halide ions are preferable, and Cl ⁇ or Br ⁇ is particularly preferable among the halide ions.
- Preferred ammonium salts include those composed of a combination of the above ammonium cation and the above anion. Particularly preferred are tetrabutylammonium bromide, triethylmethylammonium chloride, tetraethylammonium chloride, ethylmethylimidazolium chloride, Examples include ammonium methoxide, pyridinium hydroxide, and tetraethylammonium cyanate.
- the amount of the amine and / or ammonium salt used is preferably 0.1: 1 to 10: 1 (boron compound: amine and / or ammonium salt, molar ratio) with respect to the boron compound. More preferably, it is 0.2: 1 to 5: 1, and still more preferably 0.5: 1 to 2: 1. If the amount of amine and / or ammonium salt is too small, removal of by-products may be insufficient, or the amount of cation may be insufficient to efficiently produce the target product. Or ammonium salts tend to remain as impurities.
- reaction solvent in order to allow the reaction to proceed uniformly.
- the reaction solvent is not particularly limited as long as the above starting materials are soluble, and water or an organic solvent is used.
- organic solvent the same thing as the said 1st manufacturing method can be used.
- these reaction solvents may be used alone or in combination of two or more.
- the conditions for reacting the above starting materials are not particularly limited, and may be appropriately adjusted according to the progress of the reaction.
- the reaction temperature is preferably 0 ° C. to 200 ° C. More preferably, it is 30 ° C to 170 ° C, and further preferably 50 ° C to 150 ° C.
- the reaction time is preferably 0.2 hours to 200 hours, more preferably 0.5 hours to 150 hours, and even more preferably 1 hour to 100 hours.
- the ionic compound obtained by the third production method of the present invention has the structure of the above general formula (I), and is an organic cation or an inorganic cation as the cation [Kt] m + , and [B (CN) 4 as the anion. ] -
- the cation [Kt] m + may be derived from a boron compound (for example, an alkali metal ion or the like) or an ammonium salt (for example, the above general formulas (VII) to (IX)).
- any other organic cation or inorganic cation may be used.
- the fourth production method of the ionic compound of the present invention is characterized in that an ionic compound represented by the following general formula (I) is obtained by reacting hydrogen cyanide, an amine and a boron compound. is there.
- HCN hydrogen cyanide
- alkali metal cyanide such as potassium cyanide and trimethylsilyl cyanide conventionally used. It was found that the ionic compound represented by the above general formula (I) can be obtained at a low cost by using).
- the present inventors have as follows. thinking. In the reaction system, first, the hydrogen atom of hydrogen cyanide as a starting material is coordinated to the lone pair of nitrogen of the amine to form an ammonium complex. Next, it is considered that this ammonium complex reacts with the boron compound, and as a result, an ionic compound containing TCB is generated. That is, in the complex formed from hydrogen cyanide and an amine, the bond between N—CN is weaker than the alkali metal cyanide conventionally used as a cyanide source. Therefore, if hydrogen cyanide and amine are used as starting materials, it is considered that free cyanide ions are easily generated in the reaction system, and as a result, an ionic compound containing TCB is promptly generated.
- the organic cation [Kt] m + constituting the ionic compound Kt [B (CN) 4 ] m obtained by the method of the present invention is derived from hydrogen cyanide and amine when it is derived from a cation contained in the boron compound.
- the case of being derived from ammonium to be produced the case of being derived from a cation constituting an ionic substance used in a cation exchange reaction described later is included.
- Hydrogen cyanide is used as the cyan source.
- Hydrogen cyanide may be a gas or a liquid, and can also be used as a solution in which hydrogen cyanide is dissolved in water or an organic solvent. In view of ease of handling, it is preferable to use liquid or solution hydrogen cyanide.
- amine is used as a starting material.
- the amine that can be used in the present invention is preferably an amine represented by the above general formula (XII), and specific amines include those similar to those used in the third production method.
- the ionic compound represented by the general formula (I) is synthesized by reacting the hydrogen cyanide, the amine, and the starting material containing the boron compound.
- the boron compound is not particularly limited as long as it is a compound containing boron, and the same one as in the first production method can be used.
- the ionic compound of the general formula (I) is produced by reacting the hydrogen cyanide, the amine, and the boron compound.
- the mixing mode of the above starting materials is not particularly limited. A mode in which hydrogen cyanide, an amine, and a boron compound are charged into a reaction vessel; a hydrogen compound and an amine are previously charged in a reaction vessel, and then a boron compound is added to the reaction system. Any of the embodiments can be adopted.
- the mixing ratio of amine to hydrogen cyanide is preferably 0.02: 1 to 50: 1 (hydrogen cyanide: amine, molar ratio). More preferably, it is 0.05: 1 to 20: 1, and still more preferably 0.1: 1 to 10: 1. If the amount of hydrogen cyanide is too small, the amount of target ionic compound produced may be reduced or by-products (eg, tricyanoborate, dicyanoborate, etc.) may be produced. There is a tendency that the amount of impurities increases and the purification of the target product becomes difficult.
- the amount of the boron compound used is preferably 1: 4 to 1: 100 (boron compound: hydrogen cyanide, molar ratio) with respect to hydrogen cyanide. More preferably, it is 1: 4 to 1:50, and still more preferably 1: 4 to 1:20. If the compounding amount of the boron compound is too small, the amount of the target ionic compound may be reduced. On the other hand, if the amount is too large, the amount of impurities derived from the boron compound will increase, making it difficult to purify the target product. Tend.
- reaction solvent in order to allow the reaction to proceed uniformly.
- the reaction solvent is not particularly limited as long as the above starting materials are soluble, and water or an organic solvent is used.
- organic solvent the same thing as the said 1st manufacturing method can be used.
- a reaction solvent may be used independently and may mix and use 2 or more types.
- the conditions for reacting the above starting materials are not particularly limited, and may be appropriately adjusted according to the progress of the reaction.
- the reaction temperature is preferably 30 ° C. to 250 ° C. More preferably, it is 50 ° C to 170 ° C, and further preferably 80 ° C to 150 ° C.
- the reaction time is preferably 0.2 hours to 200 hours, more preferably 0.5 hours to 150 hours, and even more preferably 1 hour to 100 hours.
- tetracyanoborate ions [B (CN) 4 ] ⁇ ) are cheaper than conventional methods using an alkali metal cyanide or trimethylsilylcyanide. Can be obtained.
- the ionic compound obtained by the method of the present invention may further undergo a cation exchange reaction.
- a cation exchange reaction since the characteristics of the ionic compound according to the present invention depend on the cation species, ionic compounds having different characteristics can be easily obtained by performing cation exchange.
- the ionic substance KtX b ([Kt] m + represents an organic cation or an inorganic cation, [X b ] m ⁇ represents an anion, and m is 1 to 3) If an integer is used as a starting material, an ionic compound having a desired cation can be obtained without separately performing a cation exchange reaction.
- the cation [Kt] m + is a cation derived from a boron compound or a cyanide M a when the cation exchange reaction is not performed.
- ammonium represented by the general formula [N + -(R) t ] described above is preferable as an organic cation, and an alkali such as Li + , Na + , K +, etc.
- Metal ions and alkaline earth metal ions such as Mg 2+ and Ca 2+ are suitable as inorganic metal cations. More preferred are onium cations represented by the above general formulas (III) to (V) or ammonium compound derivatives represented by the above general formulas (VII) to (IX).
- preferable anions [X b ] m ⁇ include halide ions, cyanide ions (CN ⁇ ), hydroxide ions (OH ⁇ ), cyanate ions (OCN ⁇ ), thiocyanate ions (SCN ⁇ ), Examples thereof include alkoxy ions (RO ⁇ ), sulfate ions, nitrate ions, acetate ions, carbonate ions, perchlorate ions, alkyl sulfate ions, and alkyl carbonate ions.
- halide ions are preferable, and Cl ⁇ or Br ⁇ is particularly preferable among the halide ions.
- KtX b those comprising a combination of the above [Kt] m + and [X b ] m ⁇ are preferably used, and particularly preferable ones include tetrabutylammonium fluoride and tetrabutylammonium chloride.
- Salts of chain quaternary ammonium such as tetrabutylammonium bromide, tetraethylammonium fluoride, tetraethylammonium chloride, tetraethylammonium bromide, triethylmethylammonium fluoride, triethylmethylammonium chloride and triethylmethylammonium bromide, Triethylammonium fluoride, triethylammonium chloride, triethylammonium bromide, dibutylmethylammonium fluoride, dibutylmedium Salts of chain tertiary ammonium and halide ions such as ruammonium chloride, dibutylmethylammonium bromide, dimethylethylammonium fluoride, dimethylethylammonium chloride and dimethylethylammonium bromide, 1-ethyl-3-methylimidazolium
- a salt Kt a Xb of an alkali metal ion such as Li + , Na + , K + and a halide ion may be used as the ionic substance. Note that, from the viewpoint of reducing the amount of impurities derived from F, it is recommended to employ an ionic substance that does not contain F atoms.
- the ionic substance KtX b may be used alone or in combination of two or more thereof.
- Cation exchange reaction may be reacted to the present invention an ionic compound obtained by the first to fourth manufacturing method of an ionic substance KtX b having a desired cation.
- the mixing ratio of the ionic compound Kt [B (CN) 4 ] m and the ionic substance KtX b in the cation exchange reaction is 50: 1 to 1:50 (ionic compound Kt [B ( CN) 4 ] m : ionic substance KtX b , molar ratio). More preferably, it is 20: 1 to 1:20, and further preferably 10: 1 to 1:10. If there are too few ionic substances, the exchange reaction of the organic cation may not proceed quickly, whereas if used excessively, unreacted ionic substances will be mixed into the product, making purification difficult. Tend.
- the organic cation exchange reaction may be performed by mixing the ionic compound Kt [B (CN) 4 ] m and the ionic substance KtX b in the presence of a solvent.
- the temperature at this time is 0 ° C. to 200 ° C. (
- the reaction temperature is more preferably 10 ° C. to 100 ° C., and the reaction may be performed for 0.1 hour to 48 hours (more preferably 0.1 hour to 24 hours).
- Solvents include ester solvents such as ethyl acetate, isopropyl acetate and butyl acetate, ketone solvents such as 2-butanone and methyl isobutyl ketone, ether solvents such as diethyl ether, dibutyl ether and cyclohexyl methyl ether, dichloromethane and chloroform.
- organic solvents such as chlorinated solvents such as aromatic solvents such as toluene, benzene and xylene, and aliphatic hydrocarbons such as hexane. These solvents may be used alone or in combination of two or more. In addition, it is one of the preferable conditions of the said reaction to use 2 or more types of reaction solvent.
- the production method of the present invention preferably further includes a step of bringing the product (ionic compound) obtained by the first to fourth production methods into contact with an oxidizing agent.
- the contact between the ionic compound as the product and the oxidizing agent may be carried out before or after the cation exchange reaction. It may be performed both before and after the reaction.
- the impure ionic component contained in the ionic compound may degrade the electrochemical device in which the ionic compound is used and its peripheral members, and consequently reduce the performance of the electrochemical device.
- cyanide M a (CN) n first production method
- ammonium cyanide second production method
- TMSCN third production method
- hydrogen cyanide fourth production method
- components derived from starting materials such as free cyanide ions (CN ⁇ ) may remain in the product, or impurities inevitably mixed during the production process may exist.
- Ionic compounds according to the present invention may be used for the constituent material of the electrochemical device, CN present in ionic compounds - impurities, such as, cause corrosion degradation or electrodes of the ion conduction performance, electrochemical It causes the performance to deteriorate.
- an ionic compound having TCB as an anion is surprisingly high in stability to an oxidant compared to a general organic compound. Therefore, by contacting the synthesized ionic compound with an oxidant, a product is obtained.
- the present inventors have found that excess cyanide ions (CN ⁇ ) contained therein can be decomposed, and further, the content of impurities inevitably mixed in the starting material and the synthesis process can be reduced.
- oxidizing agent used in the oxidizing agent treatment examples include peroxides such as hydrogen peroxide, sodium perchlorate, peracetic acid, and metachloroperbenzoic acid (mCPBA), manganese compounds such as potassium permanganate and manganese oxide, and dichrome. Chromium compounds such as potassium acid, halogen-containing compounds such as potassium chlorate, sodium bromate, potassium bromate, sodium hypochlorite and chlorine dioxide, inorganic nitrogen compounds such as nitric acid and chloramine, acetic acid, osmium tetroxide, etc. It is done. Among these, peroxide is preferable, and hydrogen peroxide and sodium perchlorate are more preferable.
- the oxidant may be solid or liquid, and in the case of a solid, it may be dissolved in a solvent. Further, an oxidant solution obtained by dissolving a liquid oxidant or a solid oxidant in a solvent may be further diluted.
- the amount of the oxidizing agent used is preferably 1 to 1000 parts by mass per 100 parts by mass of the crude ionic compound, although it depends on the amount of impurities contained in the crude ionic compound (particularly CN- and the like) More preferred is 10 to 500 parts by mass, still more preferred is 20 to 300 parts by mass, and particularly preferred is 50 to 100 parts by mass. If the amount of the oxidizing agent is too large, the ionic compound may be decomposed. On the other hand, if the amount is too small, it may be difficult to sufficiently reduce excess ionic components and impurities.
- the “crude ionic compound” means a component obtained by distilling off the solvent from the reaction solution after synthesis. However, the oxidizing agent treatment may be performed as it is without distilling off the reaction solvent after the synthesis or after other purification treatment described later.
- the oxidizing agent treatment is not particularly limited as long as the crude ionic compound and the oxidizing agent come into contact with each other.
- the synthesized crude ionic compound may be brought into contact with the oxidizing agent as it is, or a crude ionic compound solution is prepared.
- the crude ionic compound solution and the oxidizing agent may be mixed and brought into contact with each other.
- a mode of contact a mode in which a solid oxidant is added to a crude ionic compound solution and the two are brought into contact with each other; a mode in which the crude ionic compound solution and the oxidant solution are mixed and the two are brought into contact with each other
- a solvent which dissolves a crude ionic compound the solvent used for the activated carbon process mentioned later is suitable.
- the ionic compound of the present invention has a higher resistance to an oxidizing agent than a general organic substance, but excessive contact with the oxidizing agent causes decomposition of the ionic compound. Therefore, from the viewpoint of suppressing the decomposition of the ionic compound, it is recommended that the oxidant treatment be performed at a low temperature and in a short time.
- the oxidizing agent treatment is preferably set to the reaction temperature or lower when synthesizing the ionic compound, and further preferably set to the boiling point or lower of the solvent. Specifically, it is preferably 0 ° C. to 150 ° C., more preferably 0 ° C. to 130 ° C., further preferably 10 ° C. to 100 ° C., and particularly preferably 10 ° C. to 80 ° C.
- ⁇ Other purification methods In the production method of the present invention, in order to further reduce the amount of impurities in the ionic compound, a conventionally known purification method other than the oxidant treatment may be employed.
- conventionally known purification methods include washing with water, organic solvents, and mixed solvents thereof; adsorption purification method; reprecipitation method; liquid separation extraction method; recrystallization method; crystallization method; Etc. These purification methods may be performed in combination.
- the timing of implementation is not particularly limited, and before contact between the crude ionic compound and the oxidizing agent; after contact between the crude ionic compound and the oxidizing agent; Both before and after contact can be adopted.
- examples of the adsorbent include activated carbon, silica gel, alumina, and zeolite.
- an adsorption treatment using activated carbon as an adsorbent is preferable because impurities are less mixed into the ionic compound.
- the activated carbon that can be used for the adsorption treatment is not particularly limited.
- the shape of the activated carbon is not particularly limited as long as it has a large surface area, and examples thereof include powder, pulverized, granulated, granulated, and spherical. Among these, the activated carbon in powder form due to the wide surface area. Is preferably used.
- the activated carbon preferably has a surface area of 100 m 2 / g or more, more preferably 400 m 2 / g or more, and particularly preferably 800 m 2 / g or more.
- activated carbon with a low impurity content.
- a carbohydrate manufactured by Nippon Environmental Chemicals Co., Ltd. Raffin (registered trademark) -6 may be mentioned.
- the amount of the activated carbon used is preferably 1 part by mass or more and 500 parts by mass or less, more preferably 10 parts by mass or more and 300 parts by mass or less, and further preferably 20 parts by mass with respect to 100 parts by mass of the crude ionic compound. As mentioned above, it is 200 mass parts or less.
- the activated carbon treatment is preferably performed on the crude ionic compound immediately after synthesis and before the oxidant treatment. From the viewpoint of effectively obtaining the effect of the activated carbon treatment, it is recommended that the crude ionic compound be dissolved or dispersed in a solvent and used for the activated carbon treatment.
- the solvent that can be used during the activated carbon treatment is not particularly limited, but is preferably a solvent that can dissolve the crude ionic compound.
- a solvent that can dissolve the crude ionic compound For example, water; methanol, ethanol, n-propyl alcohol, isopropyl alcohol, 1-butanol, sec-butanol, tert-butanol, 1-pentanol, 2-pentanol, 3-pentanol, 3-methyl-1-butanol 3-methyl-2-butanol, 2-methyl-1-butanol, tert-amyl alcohol, neopentyl alcohol, 1-hexanol, 2-hexanol, 3-hexanol, 2-methyl-1-pentanol, 3-methyl -3-pentanol, 4-methyl-2-pentanol, 3,3-dimethyl-2-butanol, 1-heptanol, 2-heptanol, 3-heptanol, 2-methyl-3-hex
- the water used for the activated carbon treatment is ultrapure water (ion resistance of 1.0 ⁇ ⁇ cm or more) treated with an ultrapure water device equipped with various filter media such as a filter, an ion exchange membrane, and a reverse osmosis membrane. preferable.
- the amount of the solvent used for the activated carbon treatment is preferably 10 parts by mass or more and 2000 parts by mass or less, more preferably 100 parts by mass or more and 1000 parts by mass or less with respect to 100 parts by mass of the crude ionic compound. More preferably, it is 200 parts by mass or more and 1000 parts by mass or less.
- the amount of the solvent is too large, the reaction apparatus becomes large, the cost increases, and the yield tends to decrease, resulting in low economic advantages.
- the amount used is too small, the purity of the ionic compound may decrease.
- the ionic compound solution after the activated carbon treatment can be directly subjected to the oxidizing agent treatment.
- the solvent used at this time is preferably a solvent capable of forming a two-layer state with the solvent exemplified in the activated carbon treatment.
- a solvent capable of forming a two-layer state with the solvent exemplified in the activated carbon treatment For example, when an organic solvent is used in the activated carbon treatment, it is preferable to use water in washing and liquid separation extraction. By using water, alkali metal ions and halide ions can be efficiently extracted into the aqueous layer, and these ionic components can be removed from the ionic compound.
- water / hexane, water / methyl ethyl ketone, water / methyl isobutyl ketone, water / dimethyl ether, water / diethyl are used from the viewpoint of layer separation from water and the recovery rate of ionic compounds.
- examples include ether, water / ethyl acetate, water / butyl acetate, and water / dichloromethane, among which water / ethyl acetate, water / butyl acetate, water / methyl isobutyl ketone, and water / diethyl ether. More preferred are water / ethyl acetate, water / butyl acetate, water / diethyl ether combinations.
- an ionic compound having a low impure ionic component content and high purity can be obtained.
- the ionic compound according to the present invention is a primary battery, a battery having a charge / discharge mechanism such as a lithium (ion) secondary battery or a fuel cell, an electrolytic capacitor, an electric double layer capacitor, a solar cell, It is suitably used as a material constituting an electrochemical device such as an electrochromic display element or an electrochemical gas sensor.
- an ionic liquid is a liquid having an ionic bond, and thus has high electrochemical and thermal stability, and further has a property of selectively absorbing a specific gas such as carbon dioxide. It is also known that the ionic compound obtained by the production method of the present invention has the same characteristics as these.
- a reusable organic synthesis reaction solvent or a machine utilizing the high thermal stability Use as a sealant or lubricant for moving parts; Use as a conductivity-imparting agent for polymers utilizing the combination of electrochemical properties and thermal stability; Gas such as carbon dioxide because of its ability to absorb gas It is suitably used for various applications such as use as an absorbent.
- the ionic compound of the present invention contains tetracyanoborate represented by [B— (CN) 4 ] — as an anion.
- the ionic compound is represented by the following general formula (XVI).
- An ion conductive material containing an ionic compound having an anion is also included in the present invention.
- Xd represents at least one element selected from Al, Si, P, Ga and Ge.
- V is an integer of 4 to 6).
- the ion conductive material of the present invention includes, as an anion component, tetracyanoborate or an ionic compound having tetracyanoborate and an anion represented by the above general formula (XVI), and the anion
- the component preferably has a maximum occupied orbital energy level of ⁇ 5.5 eV or less using a molecular orbital calculation method.
- the ionic compound of the present invention has a reduced content of impurities such as fluorine atoms as described above, and As is not included in the structure or the synthesis process. Not likely to occur.
- the anion component according to the present invention has the highest occupied orbital energy level equivalent to that of PF 6 ⁇ and AsF 6 ⁇ and has a wide potential window, so that it is suitably used as an ion conductor.
- v is an integer of 4 to 6, and is determined by the valence of element X.
- X is an Al or Ga element
- X is a Si or Ge element
- v 5.
- X is a P element
- v 6.
- the preferred form of the ion conductive material of the present invention essentially comprises tetracyanoborate and / or an ionic compound having an anion component represented by the above general formula (XVI).
- the highest occupied orbital energy level using the molecular orbital calculation method of the anion component (tetracyanoborate and the anion component of the general formula (XVI)) contained in the ion conductive material of the present invention is ⁇ 5.5 eV or less. Is more preferably ⁇ 5.6 eV or less, and particularly preferably ⁇ 5.7 eV or less.
- the ion conductive material preferably does not contain F atoms and As elements in the composition from the viewpoint of corrosiveness and harmfulness. Furthermore, the thing which does not contain Sb element for the same reason is preferable. In addition, only 1 type may be sufficient as the anion component contained in the said ion conductive material, and 2 or more types of anion components may be contained.
- the cation contained in the ion conductive material of the present invention may be either an organic cation or an inorganic cation as long as it can form a salt with tetracyanoborate and the anion represented by the general formula (XVI).
- an onium cation is preferred.
- Examples of the onium cation include onium cations represented by the above (III) to (V). In this case, an electric double layer capacitor, an electrolytic capacitor, etc. are mentioned as a preferable use of an ion conductive material.
- the amount of the ion conductive material in 100% by mass of the electrolyte material is preferably 1% by mass or more. It is preferably 5% by mass or less. More preferably, it is 5 mass% or more and 95 mass% or less. More preferably, it is 10 mass% or more and 90 mass% or less.
- the ionic compound and the ion conductive material of the present invention can function as an electrolyte or a solid electrolyte constituting an electrolytic solution in an ion conductor provided in various electrochemical devices.
- These electrolyte solutions and solid electrolytes may contain other electrolyte salts in addition to the ion conductive material of the present invention.
- an electrolyte containing ions to be used as a carrier may be used, and one kind or two or more kinds can be used.
- the dissociation constant in the electrolytic solution or the polymer solid electrolyte is large.
- alkali metal salt or alkaline earth metal salt of trifluoromethanesulfonic acid such as LiCF 3 SO 3 , NaCF 3 SO 3 , KCF 3 SO 3 ; LiC (CF 3 SO 2 ) 3 , LiN (CF 3 CF 2 SO 2 ) 2 , LiN (FSO 2 ) 2 or the like perfluoroalkanesulfonic acid alkali metal salt or alkaline earth metal salt; hexafluorophosphoric acid alkali metal salt such as LiPF 6 , NaPF 6 or KPF 6 Alkaline earth metal salts; alkali metal salts of perchloric acid such as LiClO 4 and NaClO 4 and alkaline earth metal salts; tetrafluoroborate such as LiBF 4 and NaBF 4 Alkali metal salts such as LiAsF 6 , LiI, NaI, NaAsF 6 and KI; quaternary ammonium salts of perchloric acid such as t
- alkali metal salts and / or alkaline earth metal salts are preferable.
- LiPF 6 , LiBF 4 , LiAsF 6 , alkali metal salts, alkaline earth metal salts, and quaternary ammonium salts of perfluoroalkanesulfonic acid imide are preferable.
- the alkali metal salt a lithium salt, a sodium salt, and a potassium salt are preferable, and as the alkaline earth metal salt, a calcium salt and a magnesium salt are preferable. More preferably, it is a lithium salt.
- the lower limit is 0.1% by mass and the upper limit is 50% by mass with respect to a total of 100% by mass of the ion conductive material of the present invention and the other electrolyte salt. Is preferred. If the amount is less than 0.1% by mass, the absolute amount of ions may not be sufficient, and the ionic conductivity may be reduced. If the amount exceeds 50% by mass, the migration of ions may be greatly inhibited. is there. A more preferable upper limit is 30% by mass.
- ion conductive material of the present invention include, for example, primary batteries, lithium (ion) secondary batteries, batteries having charging and discharging mechanisms such as fuel cells, electrolytic capacitors, electric double layer capacitors, lithium ion capacitors. And electrochemical devices such as solar cells and electrochromic display elements. These generally have an ion conductor, a negative electrode, a positive electrode, a current collector, a separator, and a container as basic components.
- the ionic conductor a mixture of an electrolyte and an organic solvent is suitable. If an organic solvent is used, this ionic conductor is generally called an electrolytic solution.
- the organic solvent may be an aprotic solvent that can dissolve the ion conductive material and the like.
- the aprotic solvent the compatibility with the ion conductive material of the present invention is good, the dielectric constant is large, the solubility of other electrolyte salts is high, and the boiling point is 60 ° C. or higher.
- a compound having a wide electrochemical stability range is preferable. More preferably, it is an organic solvent (non-aqueous solvent) having a low water content.
- organic solvents examples include ethers such as 1,2-dimethoxyethane, tetrahydrofuran, 2-methyltetrahydrofuran, crown ether, triethylene glycol methyl ether, tetraethylene glycol dimethyl ether, dioxane; ethylene carbonate, propylene carbonate Carbonates such as diethyl carbonate and methyl ethyl carbonate; chain carbonates such as dimethyl carbonate, ethyl methyl carbonate, diethyl carbonate, diphenyl carbonate and methyl phenyl carbonate; ethylene carbonate, propylene carbonate, 2,3-dimethyl ethylene carbonate, Cyclic carbonates such as butylene carbonate, vinylene carbonate, 2-vinylethylene carbonate; methyl formate, methyl acetate, propionic acid, methyl propionate, ethyl acetate, propyl acetate, acetic acid Aliphatic carboxylic acid esters such as chill and amyl a
- carbonates, aliphatic esters, and ethers are more preferable, and carbonates such as ethylene carbonate and propylene carbonate, ⁇ -butyrolactone, and ⁇ -valerolactone are more preferable.
- the electrolyte concentration in the ionic conductor is preferably 0.01 mol / dm 3 or more, and more preferably a saturation concentration or less. If it is less than 0.01 mol / dm 3 , the ionic conductivity is low, which is not preferable. More preferably, 0.1 mol / dm 3 or more, it is 2.5 mol / dm 3 or less.
- the ion conductive material of the present invention When used as an electrolyte of a lithium ion battery, it is preferably dissolved in two or more types of aprotic solvents. In this case, it is preferable to prepare the electrolytic solution by dissolving in a mixed solvent composed of an aprotic solvent having a dielectric constant of 20 or more and an aprotic solvent having a dielectric constant of 10 or less among these organic solvents.
- the ion conductivity is 0.5 mS / cm or more at 25 ° C. at a concentration of 1 mol / L. It is preferable.
- the ionic conductivity at 25 ° C. is less than 0.5 mS / cm, the ionic conductor using the ionic conductive material of the present invention maintains an excellent ionic conductivity for a long time and is stable. May not function properly. More preferably, it is 1.0 mS / cm or more.
- the ion conductive material of the present invention preferably has a withstand voltage of 4 V to 500 V based on Ag / Ag + . More preferably, it is 5V-500V. As described above, by including an anion having the highest occupied orbital energy level of ⁇ 5.5 eV or less by calculation of molecular orbital calculation, it is possible to show a high withstand voltage.
- lithium secondary battery (2) electrolytic capacitor, (3) electric double layer capacitor, and (4) lithium ion capacitor This will be described in more detail.
- Lithium secondary battery is composed of a positive electrode, a negative electrode, a separator interposed between the positive electrode and the negative electrode, and an ionic conductor using the ion conductive material of the present invention as basic components.
- the electrolyte solution material according to the present invention contains a lithium salt as an electrolyte.
- Such a lithium secondary battery is preferably a non-aqueous electrolyte lithium secondary battery that is a lithium secondary battery other than the water electrolyte.
- This lithium secondary battery uses coke as a negative electrode active material, which will be described later, and uses a compound containing Co as the positive electrode active material.
- a material used for a conventionally known negative electrode can be used, and it is not particularly limited.
- graphite such as natural graphite and artificial graphite
- carbon materials such as coke and fired organic matter
- lithium-aluminum Alloy lithium-magnesium alloy, lithium-indium alloy, lithium-thallium alloy, lithium-lead alloy, lithium-bismuth alloy and other lithium alloys, or one or more of titanium, tin, iron, molybdenum, niobium, vanadium and zinc
- a metal oxide containing 2 or more types and a metal sulfide are mentioned.
- metallic lithium and carbon materials that can occlude / release alkali metal ions are more preferable.
- the positive electrode it is possible to use a material used for conventional positive electrode are not particularly limited, for example, LiCoO 2, LiNiO 2, LiMnO 2, LiFeO 2, LiFePO lithium-containing transition metal oxides such as 4 Can be mentioned.
- the average particle diameter of the positive electrode active material particles is preferably 0.1 to 30 ⁇ m.
- the electrolytic capacitor is an anode foil, a cathode foil, an electrolytic paper that is a separator sandwiched between the anode foil and the cathode foil, a lead wire, and an ion conductor using the ion conductive material of the present invention.
- an electrolytic capacitor an aluminum electrolytic capacitor is suitable.
- a thin oxide film (aluminum oxide) formed by electrolytic anodic oxidation on the surface of an aluminum foil roughened by producing fine irregularities by electrolytic etching is suitable. .
- the electric double layer capacitor is composed of a negative electrode, a positive electrode, and an ion conductor using the ion conductive material of the present invention as a basic constituent element.
- An electrode element composed of a positive electrode and a negative electrode disposed is made to contain an electrolytic solution that is an ionic conductor.
- activated carbon porous metal oxide, porous metal, and conductive polymer are suitable.
- activated carbon porous metal oxide, porous metal, and conductive polymer are suitable.
- Lithium Ion Capacitor uses a carbon-based material that can store lithium ions as a negative electrode material while using the principle of a general electric double layer capacitor. This is an improved capacitor, and the principle of charging and discharging is different between the positive electrode and the negative electrode, and has a structure in which the negative electrode of the lithium ion secondary battery and the positive electrode of the electric double layer are combined.
- a material capable of inserting and extracting lithium ions is suitable.
- the materials capable of occluding and releasing lithium ions include pyrolytic carbon; coke such as pitch coke, needle coke, and petroleum coke; graphite; glassy carbon; phenol resin, furan resin, etc., fired at an appropriate temperature.
- Li 3-f G f N (G: a transition metal, f: 0 real number and less than 0.8) lithium nitrogen compounds such as Etc.
- These can use 1 type (s) or 2 or more types. Among these, a carbon material is more preferable.
- activated carbon, porous metal oxide, porous metal, and conductive polymer are suitable as the positive electrode.
- the ion conductor using the ion conductive material of the present invention constitutes an electrolytic solution provided between the negative electrode and the positive electrode.
- the content of impurities containing F atoms was determined by the following method. 11 B-NMR measurement was performed using d6-DMSO as a solvent. In the obtained 11 B-NMR spectrum, the area of the peak derived from B (CN) 4 at ⁇ 38 ppm is defined as 100 mol%, and this peak area is compared with the other peak (derived from impurities) area. Then, the number of moles of impurities (mol percentage (mol%)) was calculated.
- the ionic conductivity of the ionic compound solution was measured by a complex impedance method using an SUS electrode and an impedance analyzer (Solartron “SI1260”) at a temperature of 25 ° C.
- the potential window was measured with a cyclic voltammetry tool (“HSV-100” manufactured by Hokuto Denko) using a three-pole cell as an electrode.
- a glassy carbon electrode was used for the working electrode in the triode cell
- a Pt electrode was used for the target electrode
- an Ag electrode was used for the reference electrode.
- Example 1 an ionic compound containing tetracyanoborate was synthesized using cyanide M a (CN) n as a starting material.
- Synthesis Example 1-1 Synthesis of tetrabutylammonium tetracyanoborate (Bu 4 NTCB) The inside of a 50-ml flask equipped with a stirrer, a dropping funnel, and a reflux tube was purged with nitrogen, and at room temperature under a nitrogen atmosphere, After adding 5.1 mg (15.8 mmol) of tetrabutylammonium bromide, 9.26 g (78.9 mmol) of zinc (II) cyanide, 10 ml of toluene, and 2.8 g (11.2 mmol) of boron tribromide, 130 ° C. The contents were stirred for 2 days while heating in an oil bath.
- tetrabutylammonium tetracyanoborate Bu 4 NTCB
- toluene in the flask was distilled off under reduced pressure to obtain a black solid.
- the obtained solid was pulverized in a mortar and then placed in a beaker equipped with a stirrer, and 200 ml of chloroform was added thereto twice to extract the product into a chloroform layer. Subsequently, the obtained chloroform solution was transferred to a separatory funnel and washed with 200 ml of water, and then the organic layer was separated and concentrated by an evaporator to obtain an oily crude product.
- Synthesis Example 1-2 Synthesis of 1-ethyl-3-methylimidazolium tetracyanoborate (EtMeImTCB) Instead of tetrabutylammonium bromide, 3.0 g (15.8 mmol) of 1-ethyl-3-methylimidazolium bromide was used. Except for the above, the same operation as in Synthesis Example 1-1 was performed to obtain 1-ethyl-3-methylimidazolium tetracyanoborate (yellow oily substance, yield: 1.0 g (4.4 mmol), yield: 38 %, Melting point: 15 ° C.).
- Synthesis Example 1-3 Synthesis of triethylammonium tetracyanoborate (Et 3 HNTCB) The same operation as in Synthesis Example 1-1 except that 2.9 g (15.8 mmol) of triethylammonium bromide was used instead of tetrabutylammonium bromide To obtain triethylammonium tetracyanoborate (yellow solid, yield: 1.0 g (4.5 mmol), yield: 40%, melting point: 150 ° C.).
- Synthesis Example 1-4 Synthesis of triethylmethylammonium tetracyanoborate (Et 3 MeNTCB) Same as Synthesis Example 1-1 except that 3.1 g (15.8 mmol) of triethylmethylammonium bromide was used instead of tetrabutylammonium bromide Thus, triethylmethylammonium tetracyanoborate was obtained (yellow solid, yield: 1.2 g (5.0 mmol), yield: 45%, melting point: 115 ° C.).
- Synthesis Example 1-5 Synthesis of tetraethylammonium tetracyanoborate (Et 4 NTCB) The same operation as in Synthesis Example 1-1 except that 3.3 g (15.8 mmol) of tetraethylammonium bromide was used instead of tetrabutylammonium bromide To obtain tetraethylammonium tetracyanoborate (yellow solid, yield: 1.1 g (4.5 mmol), yield: 40%).
- Synthesis Example 1-6 Synthesis of tetrabutylammonium tetracyanoborate (Bu 4 NTCB) 2 Tetrabutylammonium tetracyanoborate was obtained in the same manner as in Synthesis Example 1-1 except that 4.4 g (15.8 mmol) of tetrabutylammonium chloride was used instead of tetrabutylammonium bromide (yellow solid, Yield: 1.6 g (4.5 mmol), yield: 40%, melting point: 90 ° C.).
- Synthesis Example 1-7 Synthesis of tetrabutylammonium tetracyanoborate (Bu 4 NTCB) 3
- the inside of a flask having a capacity of 50 ml equipped with a stirrer, a dropping funnel and a reflux tube was purged with nitrogen, and under a nitrogen atmosphere at room temperature, 5.1 g (15.8 mmol) of tetrabutylammonium bromide, zinc cyanide (II ) 9.26 g (78.9 mmol) and 11.2 ml (11.2 mmol) of 1.0 M boron trichloride p-xylene solution were added, and then the contents were stirred for 2 days while heating in an oil bath at 150 ° C. .
- the organic solvent in the flask was distilled off under reduced pressure to obtain a black solid.
- the obtained solid was pulverized in a mortar and then placed in a beaker equipped with a stirrer, and 200 ml of chloroform was added thereto twice to extract the product into a chloroform layer. Subsequently, the obtained chloroform solution was transferred to a separatory funnel and washed with 200 ml of water, and then the organic layer was separated and concentrated by an evaporator to obtain an oily crude product.
- reaction vessel was changed to a sealed pressure vessel (capacity: 100 ml, Teflon (registered trademark) inner cylinder, stainless steel), but no product was obtained.
- Table 1 shows various physical properties of the ionic compounds obtained in the respective synthesis examples, measured by the above measuring methods.
- the reaction proceeds at a lower temperature (130 ° C. to 150 ° C.) than when alkali metal cyanide is used as the starting material (reaction temperature: 250 ° C.). Can be made.
- an ionic compound having tetracyanoborate can be stably obtained without using expensive trimethylsilylcyanide.
- the thermal decomposition starting temperature of Comparative Experimental Example 1 is 20 ° C. or more lower than the thermal decomposition starting temperature of Experimental Example 1, and when the content of impurities containing F atoms is 5 mol% or higher, It can be seen that the material durability is greatly impaired. This is presumably because the impurities having a BF bond contained in the ionic compound reacted with O atoms such as moisture and oxygen present in the air and decomposed.
- the surface resistance of the obtained sheet was measured using a surface resistance measuring instrument (manufactured by Mitsubishi Chemical Corporation, “HT-210”) and found to be 9 ⁇ 10 7 ⁇ . In addition, no bleeding of ionic compounds was observed.
- the pour point was evaluated according to JIS K2269-1987.
- the observed pour point of EtMeImTCB was ⁇ 20 ° C.
- the kinematic viscosity was measured according to JIS K2283-2000.
- the kinematic viscosity of EtMeImTCB at 40 ° C. was 30 cSt (3.0 ⁇ 10 ⁇ 5 m 2 / s).
- the coefficient of friction was measured using a pendulum type friction tester (manufactured by Shinko Engineering Co., Ltd., “Iwata-type pendulum type oil friction tester”).
- the friction coefficient of EtMeImTCB was 0.16.
- the ionic compound of the present invention since the content of F atoms and impurities containing F atoms is reduced to an extremely low level, there is a problem of corrosion of peripheral members even when this is used for various applications. And stable characteristics (thermal, physical, electrochemical characteristics, etc.) can be exhibited.
- Example 2 In Synthesis Example 2, an ionic compound having tetracyanoborate as an anion was synthesized using an ammonium cyanide compound as a starting material.
- Synthesis Example 2-1 Synthesis 1 of tetrabutylammonium tetracyanoborate (Bu 4 NTCB) The inside of a 50 ml flask equipped with a stirrer, a dropping funnel and a reflux tube was purged with nitrogen, and 0.64 g (2.0 mmol) of tetrabutylammonium bromide and 2.65 g of tetrabutylammonium cyanide at room temperature under a nitrogen atmosphere ( (9.9 mmol), 0.35 g (1.4 mmol) of boron tribromide, and 1.4 ml of toluene were added, and the contents were stirred for 2 days while being heated in an oil bath at 130 ° C. Two days later, toluene in the flask was distilled off under reduced pressure to obtain a black solid.
- tetrabutylammonium tetracyanoborate Bu 4 NTCB
- Synthesis Example 2-2 Synthesis 2 of tetrabutylammonium tetracyanoborate The same procedure as in Synthesis Example 2-1 was performed, except that 1.4 ml of boron trichloride (1.4 mmol, 1M p-xylene solution, manufactured by Aldrich) was used instead of boron tribromide, and toluene was not used.
- the product tetrabutylammonium tetracyanoborate was obtained (yellow solid, yield: 0.21 g (0.6 mmol), yield: 42%, melting point: 90 ° C.).
- Synthesis Example 2-3 Synthesis of tetrabutylammonium tetracyanoborate 3 The same operation as in Synthesis Example 2-2 was performed except that tetrabutylammonium bromide was not used, and the product tetrabutylammonium tetracyanoborate was obtained (yellow solid, yield: 0.18 g (0.5 mmol)). Yield: 35%, melting point: 90 ° C.).
- Synthesis Example 2-4 Synthesis 4 of tetrabutylammonium tetracyanoborate
- This black solid was put into a beaker equipped with a stirrer, and 100 ml of chloroform and 100 ml of water were added thereto, the chloroform layer was extracted with a separatory funnel, and the chloroform layer was separated and washed twice with 100 ml of water. The layer was concentrated under reduced pressure to give an oily crude product. This was purified by column chromatography using neutral alumina as a filler (developing solvent: mixed solvent of diethyl ether and chloroform), the fraction containing the product was separated, the solvent was distilled off, and the residue was dried. To give the product tetrabutylammonium tetracyanoborate (yellow solid, yield: 0.1 g (0.3 mmol), yield: 20%, melting point: 90 ° C.).
- Synthesis Example 2-5 Synthesis of tetrabutylammonium tetracyanoborate 5
- a 2 liter flask equipped with a stirrer, a dropping funnel, and a reflux tube 58.7 g of unpurified tetrabutylammonium cyanide obtained by raw material synthesis and 11.6 g (36.3 mmol) of tetrabutylammonium bromide were obtained.
- the flask was purged with nitrogen, and 26 ml (26 mmol) of 1M boron trichloride p-xylene solution was dropped into the system from the dropping funnel at room temperature.
- the reaction solution was stirred at 150 ° C. for 2 days and then the solvent was distilled off.
- Synthesis Example 2-6 Synthesis 6 of tetrabutylammonium tetracyanoborate The inside of a 50 ml flask equipped with a stirrer, a dropping funnel, and a reflux tube was purged with nitrogen, and 0.65 g (2.0 mmol) of tetrabutylammonium bromide and tetrabutylammonium cyanide at room temperature under a nitrogen atmosphere. After adding 98 g (11.0 mmol) and 2.0 ml (2.0 mmol) of 1M boron trichloride p-xylene solution, the contents were stirred for 2 days while heating in an oil bath at 150 ° C. Thereafter, the solvent was distilled off to obtain a black solid.
- the obtained crude product was made into a 10% by mass ethyl acetate solution, and 2.1 g of activated carbon (Calboraphin (registered trademark) -6, manufactured by Nippon Enviro Chemicals Co., Ltd.) was added thereto, followed by stirring at room temperature for 30 minutes. . Thereafter, the obtained activated carbon suspension is filtered through a membrane filter (0.2 ⁇ m, PTFE, hydrophilic), and the activated carbon on the filter is dispersed in 6.5 g of ethyl acetate and stirred at 50 ° C. for 10 minutes. The operation of filtering again was repeated 5 times. The obtained filtrate and the washing solution were combined, and the solvent was distilled away from the filtrate, followed by drying to obtain a brown solid.
- activated carbon Calboraphin (registered trademark) -6, manufactured by Nippon Enviro Chemicals Co., Ltd.
- This powder was spread on a vat and further dried at 80 ° C. under reduced pressure for 3 days to obtain tetrabutylammonium tetracyanoborate as a target product (yield 0.36 g (1.0 mmol), yield 50%). .
- Synthesis Example 2-7 Synthesis of triethylmethylammonium tetracyanoborate Synthesis example except that tetrabutylammonium bromide was not used and 1.56 g (11 mmol) of triethylmethylammonium cyanide was used instead of tetrabutylammonium cyanide 14 and triethylmethylammonium tetracyanoborate (Et 3 MeNTCB) was obtained as a product (pale yellow solid, yield: 0.23 g (1 mmol), yield: 50%, melting point: 115 ° C.) . The product showed the same NMR data as in Synthesis Example 1-4.
- an ionic compound having tetracyanoborate can be produced even under a reaction temperature condition of 200 ° C. or lower. Further, an ionic compound having tetracyanoborate can be obtained without using expensive trimethylsilane cyanide.
- Example 3 In Example 3, an ionic compound containing tetracyanoborate was synthesized using trimethylsilyl cyanide as a starting material.
- Synthesis Example 3-1 Synthesis 1 of triethylmethylammonium tetracyanoborate (Et 3 MeNTCB) 30.3 g (200 mmol) of triethylmethylammonium chloride (Et 3 MeNCl), which had been heated and dried in advance, was added to a flask having a volume of 1 L equipped with a stirrer, a reflux tube and a withdrawal device, and a dropping funnel. After replacing the inside of the container with nitrogen, 109.0 g (1100 mmol) of trimethylsilylcyanide (TMSCN) was added at room temperature, and the mixture was stirred and mixed.
- TMSCN trimethylsilylcyanide
- the obtained activated carbon suspension was filtered through a membrane filter (0.2 ⁇ m, made of PTFE), the solvent was distilled off, and the residue was dried to obtain the target product, triethylmethylammonium tetracyanoborate (pale yellow solid). (Yield: 37.9 g (164 mmol), yield: 82%, melting point: 115 ° C.).
- Synthesis Example 3-2 Synthesis 2 of triethylmethylammonium tetracyanoborate Triethylmethylammonium tetracyanoborate (pale yellow solid) was obtained in the same manner as in Synthesis Example 3-1 except that purification by column chromatography was performed instead of activated carbon filtration (yield: 37.9 g (164 mmol)). Yield: 82%, melting point: 115 ° C.).
- the purification method is as follows. In a 500 mL beaker, 45 g of the crude product and 20 mL (4: 1 (volume ratio)) of a mixed solution of methylene chloride and acetonitrile were added and dissolved by stirring for 5 minutes. Next, purification was performed by column chromatography using aluminum oxide (450 cc) as a stationary phase and a mixed solvent of methylene chloride and acetonitrile (4: 1 (volume ratio), 2.5 L) as a mobile phase, and the target product, triethyl, was obtained. Methyl ammonium tetracyanoborate was obtained. The product showed the same NMR spectrum and various physical properties as in Synthesis Example 3-1.
- Synthesis Example 3-3 Synthesis of tetrabutylammonium tetracyanoborate (Bu 4 NTCB) Synthesis was performed except that 64.5 g (200 mmol) of tetrabutylammonium bromide was used instead of Et 3 MeNCl used in Synthesis Example 3-1. The same operation as in Example 3-1 was performed to obtain white solid tetrabutylammonium tetracyanoborate as a product (yield: 60.0 g (196 mmol), yield: 98%, melting point: 90 ° C.). The product showed the same NMR spectrum and various physical properties as in Synthesis Example 1-1. Ionic conductivity (25 ° C.): 0.009 S / cm Thermal decomposition start temperature: 210 ° C Potential window: -3.2V to 2.0V
- Synthesis Example 3-5 Synthesis 1 of triethylammonium tetracyanoborate (Et 3 NHTCB) The same operation as in Synthesis Example 3-1 was performed except that 20.2 g (200 mmol) of triethylamine was used instead of Et 3 MeNCl to obtain a light yellow solid triethylammonium tetracyanoborate as a product (yield: 23 0.8 g (110 mmol), yield: 60%, melting point: 150 ° C.). The product showed the same NMR spectrum and various physical properties as in Synthesis Example 1-3. Ionic conductivity (25 ° C.): 0.018 S / cm Thermal decomposition start temperature: 285 ° C Potential window: -1.7V to 2.0V
- Synthesis Example 3-6 Synthesis 2 of triethylammonium tetracyanoborate
- the same operation as in Synthesis Example 3-1 was performed except that 27.5 g (200 mmol) of triethylammonium chloride was used instead of Et 3 MeNCl to obtain a light yellow solid triethylammonium tetracyanoborate as a product (yield) : 23.8 g (110 mmol), yield: 60%, melting point: 150 ° C.
- the product showed the same NMR spectrum and various physical properties as those in Synthesis Example 3-5.
- Synthesis Example 3-7 Synthesis 1 of tetraethylammonium tetracyanoborate (Et 4 NTCB) A white solid tetraethylammonium tetracyanoborate was obtained as a product in the same manner as in Synthesis Example 3-1, except that 33.1 g (200 mmol) of tetraethylammonium chloride was used instead of Et 3 MeNCl (yield: 46.6 g (190 mmol), yield: 95%, melting point: 150 ° C.). The product showed an NMR spectrum similar to that of Synthesis Example 1-5. Ionic conductivity (25 ° C.): 0.015 S / cm Thermal decomposition start temperature: 220 ° C Potential window: -3.0V to 2.0V
- Synthesis Example 3-8 Synthesis of triethylmethylammonium tetracyanoborate 3 Similar to Synthesis Example 3-1, except that a 1 L pressure vessel (made of stainless steel, usable under pressurized conditions of 5 kPa) was used instead of the eggplant flask, and TMSCl produced as a by-product during the reaction was not extracted. As a product, a pale yellow solid tetraethylammonium tetracyanoborate was obtained as a product (yield: 33.3 g (144 mmol), yield: 72%, melting point: 115 ° C.). The obtained product exhibited the same NMR spectrum and various physical properties as those in Synthesis Example 3-1.
- Synthesis Example 3-9 Synthesis 2 of tetrabutylammonium tetracyanoborate Instead of boron trichloride, 20.8 g (200 mmol) of trimethyl borate was used, and the same procedure as in Synthesis Example 3-3 was performed except that the reaction vessel was heated to 170 ° C. Ammonium tetracyanoborate was obtained (yield: 50.0 g (140 mmol), yield: 70%, melting point: 90 ° C.). The obtained product exhibited the same NMR spectrum and various physical properties as those in Synthesis Example 3-3.
- Synthesis Example 3-10 Synthesis of tetrabutylammonium tetracyanoborate 3 The same operation as in Synthesis Example 3-3 was performed except that 29.2 g (200 mmol) of triethyl borate was used instead of boron trichloride and the reaction vessel was heated to 170 ° C. Ammonium tetracyanoborate was obtained (yield: 50.0 g (140 mmol), yield: 70%, melting point: 90 ° C.). The obtained product exhibited the same NMR spectrum and various physical properties as those in Synthesis Example 3-3.
- Synthesis Example 3-11 Synthesis of tetrabutylammonium tetracyanoborate 4 Instead of boron trichloride, 28.4 g (200 mmol) of boron trifluoride diethyl ether complex was used, and the same operation as in Synthesis Example 3-3 was performed except that the reaction vessel was heated to 170 ° C. Solid tetrabutylammonium tetracyanoborate was obtained (yield: 53.6 g (150 mmol), yield: 75%, melting point: 90 ° C.). The obtained product exhibited the same NMR spectrum and various physical properties as those in Synthesis Example 3-3.
- Synthesis Example 3-12 Synthesis of triethylmethylammonium tetracyanoborate 4 The same operation as in Synthesis Example 3-1 was carried out except that butyl acetate was used instead of p-xylene to obtain a pale yellow solid triethylmethylammonium tetracyanoborate as a product (yield: 27.7 g (120 mmol)). ), Yield: 55%, melting point: 115 ° C.). The obtained product exhibited the same NMR spectrum and various physical properties as those in Synthesis Example 3-1.
- Synthesis Example 3-13 Synthesis of triethylmethylammonium tetracyanoborate 5 The same reaction as in Synthesis Example 3-1 was performed, and 69.5 g (640 mmol) of TMSCl extracted from the reflux extraction part was added to a flask (capacity 500 mL) equipped with a stirrer, and then triethylamine 64 was added at room temperature (25 ° C.). 0.7 g (640 mmol) and 17.3 g (640 mmol) of hydrogen cyanide were added and stirred overnight. The obtained product was distilled to obtain TMSCN (colorless liquid, yield: 57.1 g (576 mmol), yield: 90%).
- Synthesis Example 3-14 Synthesis of tetramethylammonium tetracyanoborate The same operation as in Synthesis Example 3-1 was performed except that 21.9 g (200 mmol) of tetramethylammonium chloride was used instead of Et 3 MeNACl. Tetramethylammonium tetracyanoborate was obtained as a white solid (yield: 26.5 g (140 mmol), yield: 70%).
- Synthesis Example 3-15 Synthesis of Ammonium Tetracyanoborate The same operation as in Synthesis Example 3-1 was performed except that 10.7 g (200 mmol) of ammonium chloride was used instead of Et 3 MeNCl. Tetracyanoborate was obtained (yield: 8.0 g (60 mmol), yield: 30%).
- Synthesis Example 3-16 Synthesis of tributylammonium tetracyanoborate The same operation as in Synthesis Example 3-1 was performed except that 44.4 g (200 mmol) of tributylammonium chloride was used instead of Et 3 MeNCl, and a yellow solid was obtained as a product. Of tributylammonium tetracyanoborate was obtained (yield: 48.2 g (160 mmol), yield: 80%).
- Synthesis Example 3-17 Synthesis of Lithium Tetracyanoborate 48.2 g (160 mmol) of tributylammonium tetracyanoborate obtained in Synthesis Example 3-16, 200 g of butyl acetate, lithium hydroxide was placed in a 500 ml beaker equipped with a stirrer. 4.6 g (192 mmol) of monohydrate and 200 g of ultrapure water were added and stirred for 1 hour. Thereafter, the mixed solution was transferred to a separatory funnel and allowed to stand to separate into two layers. Among these, the pale yellow solid obtained by separating and concentrating the lower layer (aqueous layer) was mixed with 200 g of acetonitrile and stirred.
- Synthesis Example 3-18 Synthesis of triethylmethylammonium tetracyanoborate 6 The reaction was carried out in the same manner as in Synthesis Example 3-1, and 69.5 g (640 mmol) of TMSCl extracted from the reflux extraction part was added to a flask equipped with a stirrer (capacity 500 mL), and then at room temperature (25 ° C.), hexamethyl 103.2 g (640 mmol) of disilazane and 51.9 g (1919 mmol) of hydrogen cyanide were added and stirred overnight. The obtained product was distilled to obtain TMSCN (colorless liquid, yield: 171.4 g (1727 mmol), yield: 90%).
- Synthesis Example 3-1 except that 52.1 g (525 mmol) of TMSCN obtained using TMSCl as a reaction byproduct, 12.3 g (105 mmol) of boron trichloride and 15.9 g (105 mmol) of Et 3 MeNCl were used. Similarly, triethylmethylammonium tetracyanoborate was obtained (pale yellow solid, yield: 19.8 g (86 mmol), yield: 82%, melting point: 115 ° C.). The obtained product exhibited the same NMR spectrum and various physical properties as those in Synthesis Example 3-1.
- Synthesis Example 3-19 Synthesis 1 of trimethylsilyltetracyanoborate (Me 3 STCB) The same operation as in Synthesis Example 3-1 was performed except that Et 3 MeNCl was not used, and trimethylsilyltetracyanoborate was obtained as a product. Yield: 1.9 g (10 mmol), yield: 5%.
- Synthesis Example 3-20 Synthesis of triethylmethylammonium tetracyanoborate 7 The same operation as in Synthesis Example 3-1 was performed except that 71.6 g (1100 mmol) of potassium cyanide was used in place of trimethylsilylcyanide, but the target product, triethylmethylammonium tetracyanoborate, was not obtained at all.
- the reaction activity due to reaction by-products is unlikely to decrease, so that an ionic compound having tetracyanoborate ions can be produced in a higher yield than the conventional method.
- an ammonium salt is used, an ionic compound having an organic cation can be produced in one step.
- Synthesis Example 3-21 Synthesis of tributylammonium tetracyanoborate 2
- the same operation as in Synthesis Example 3-16 was conducted except that 42.5 g (200 mmol) of tributylammonium cyanide and 84.8 g (855 mmol) of trimethylsilylcyanide were used instead of tributylammonium chloride.
- Tributylammonium tetracyanoborate was obtained (yield: 42.5 g (141 mmol), yield: 75%).
- the obtained product exhibited the same NMR spectrum and various physical properties as those in Synthesis Example 3-16.
- Example 4 an ionic compound having tetracyanoborate as an anion was synthesized using hydrogen cyanide (HCN) as a starting material.
- HCN hydrogen cyanide
- Synthesis Example 4-2 Synthesis of triethylammonium tetracyanoborate Triethylammonium tetracyanoborate (brown solid) in the same manner as in Synthesis Example 4-1, except that 5.58 g (55 mmol) of triethylamine was used instead of tributylamine. Et 3 NHTCB) (yield 0.65 g (3 mmol), yield 30%).
- the NMR data of the obtained triethylammonium tetracyanoborate are shown below.
- Various physical properties measured by the above measuring methods are as follows.
- an ionic compound having tetracyanoborate can be obtained using inexpensive hydrogen cyanide as a starting material.
- Example 5 In Example 5, the amount of impurities contained in the ionic compounds obtained in Synthesis Examples 5 to 11 below was measured.
- the measuring method of various impurities is as follows.
- Ionic chromatography system ICS-3000 (Nihon Dionex Co., Ltd.) was prepared by diluting 0.3 g of ionic compound obtained in the following synthesis example 100 to 1000 times with ultrapure water (over 18.2 ⁇ ⁇ cm). The amount of halide ions contained in the ionic compound was measured.
- Separation mode Ion exchange Detector: Electrical conductivity detector CD-20
- Column Column for anion analysis AS17-C (manufactured by Nippon Dionex)
- Ionic chromatography system ICS-1500 (manufactured by Nippon Dionex Co., Ltd.) was prepared by diluting 0.1 g of the ionic compound obtained in the following synthesis example 10,000 times with ultrapure water (over 18.2 ⁇ ⁇ cm). was used to measure the amount of cyanide ion (CN ⁇ ) contained in the ionic compound.
- Separation mode Ion exchange Eluent: 10 mmol H 2 SO 4 aqueous solution
- Regenerating solution 0.5 mmol NaOH aqueous solution
- Detector Electrochemical detector ED-50A Column: Column for anion analysis ICE-AS1
- the water content in the sample was measured using a moisture measuring device “AQ-2000” manufactured by Hiranuma Sangyo Co., Ltd.
- the sample injection volume is 0.1 ml
- “Hydranal Aqualite RS-A” (sold by Hiranuma Sangyo Co., Ltd.) is used as the generation solution
- “Aqualite CN” (manufactured by Kanto Chemical Co., Ltd.) is used as the counter electrode solution. )It was used.
- the sample was injected from the sample inlet using a syringe so as not to touch the outside air.
- Synthesis example 5 Synthesis of triethylmethylammonium tetracyanoborate ⁇ Synthesis of crude product> 30.3 g (200 mmol) of triethylmethylammonium chloride (Et 3 MeCl), which had been heated and dried in advance, was added to a flask having a volume of 1 L equipped with a stirrer, a reflux tube and a withdrawal device, and a dropping funnel. After replacing the inside of the container with nitrogen, 109.0 g (1100 mmol) of trimethylsilylcyanide (TMSCN) was added at room temperature, and the mixture was stirred and mixed.
- TMSCN trimethylsilylcyanide
- Synthesis Example 5-2 Et 3 MeNTCB was synthesized in the same manner as in Synthesis Example 5-1, except that 83 mL of a 30% by mass aqueous solution of sodium perchlorate was used in place of the hydrogen peroxide solution in the oxidizing agent treatment.
- Synthesis Example 5-3 Et 3 MeNTCB was synthesized in the same manner as in Synthesis Example 5-1, except that the activated carbon treatment was not performed after the synthesis of the crude product.
- Synthesis Example 5-4 Et 3 MeNTCB treated with activated carbon synthesized in Synthesis Example 5-1 was directly used as a measurement sample.
- Synthesis Example 5-5 46 ml of Et 3 MeNTCB before the activated carbon treatment produced in Synthesis Example 5-1 was added to 104 ml of 0.01 mol / L NaOH aqueous solution and stirred at 50 ° C. for 60 minutes. Then, Et 3 to NaOH solution MeNTCB, Et 3 nine times the mass of butyl acetate added to MeNTCB, performs extraction processing in the same manner as in Synthesis Example 5-1, synthesized (activated carbon treatment of Et 3 MeNTCB, No oxidant treatment).
- Synthesis Example 6 Synthesis Example 6-1 Synthesis of tetrabutylammonium tetracyanoborate Similar to Synthesis Example 5-1, except that 64.5 g (200 mmol) of tetrabutylammonium bromide was used instead of Et 3 MeNCl used in Synthesis Example 5. The crude product was then synthesized and treated with activated carbon to obtain white solid tetrabutylammonium tetracyanoborate (Bu 4 NTCB) as a product (yield: 60.0 g (164 mmol), yield: 82%, melting point: 90 ° C). The product showed the same NMR spectrum as in Synthesis Example 1-1.
- Synthesis Example 6-2 The Bu 4 NTCB obtained in Synthesis Example 6-1 was mixed with 2.25 times the mass of hydrogen peroxide water (30 mass% H 2 O 2 aqueous solution) with respect to Bu 4 NTCB, and the mixture was mixed at 50 ° C. for 60 minutes. Stir. Thereafter, extraction and drying were performed in the same manner as in Experimental Example 1-1 to obtain a white solid Bu 4 NTCB (yield: 45 g (120 mmol), yield: 62%).
- Synthesis example 7 Synthesis of 1-ethyl-3-methylimidazolium tetracyanoborate Synthesis Example 5 except that 38.2 g (200 mmol) of 1-ethyl-3-methylimidazolium bromide was used instead of Et 3 MeNCl
- the crude product was synthesized and treated with activated carbon in the same manner as in -1, and 1-ethyl-3-methylimidazolium tetracyanoborate (EtMeImTCB) was obtained as a light yellow oil (yield: 24.9 g (110 mmol)). ), Yield: 55%, melting point: 15 ° C.).
- the product showed an NMR spectrum similar to that of Synthesis Example 1-2.
- Synthesis example 8 Synthesis of triethylammonium tetracyanoborate A crude product was synthesized and treated with activated carbon in the same manner as in Synthesis Example 5-1, except that 20.2 g (200 mmol) of triethylamine was used instead of Et 3 MeNCl. As a product, triethylammonium tetracyanoborate (Et 3 NHTCB) was obtained as a pale yellow solid (yield: 23.8 g (110 mmol), yield: 60%, melting point: 150 ° C.). The product showed the same NMR spectrum as in Synthesis Example 1-3.
- Synthesis Example 8-2 Et 3 NHTCB obtained in Synthesis Example 8-1 was mixed with 2.25 times the mass of hydrogen peroxide water (30 mass% H 2 O 2 aqueous solution) with respect to Et 3 NHTCB, and the mixture was mixed at 50 ° C. for 60 minutes. Stir. Thereafter, extraction and drying were performed in the same manner as in Synthesis Example 5-1. Thus, a light yellow solid Et 3 NHTCB was obtained (yield: 17 g (80 mmol), yield: 40%).
- Synthesis Example 9 Synthesis of tetraethylammonium tetracyanoborate Synthesis of crude product and treatment with activated carbon in the same manner as in Synthesis Example 5-1, except that 33.1 g (200 mmol) of tetraethylammonium chloride was used instead of Et 3 MeNCl. And tetraethylammonium tetracyanoborate (Et 4 NTCB) as a white solid was obtained as a product (yield: 46.6 g (190 mmol), yield: 95%, melting point: 150 ° C.). The product showed an NMR spectrum similar to that of Synthesis Example 1-5.
- Synthesis Example 9-2 Et 4 NTCB obtained in Synthesis Example 9-1 was mixed with hydrogen peroxide water (30 mass% H 2 O 2 aqueous solution) having a mass 2.25 times that of Et 4 NTCB and mixed at 50 ° C. for 60 minutes. Stir. Thereafter, extraction and drying were performed in the same manner as in Synthesis Example 5-1. Thus, a light yellow solid Et 4 NTCB was obtained (yield: 35 g (144 mmol), yield: 72%).
- Synthesis Example 10 Synthesis of tetramethylammonium tetracyanoborate Synthesis of the crude product in the same manner as in Synthesis Example 5-1, except that 21.9 g (200 mmol) of tetramethylammonium chloride was used instead of Et 3 MeNCl. Activated carbon treatment was performed to obtain tetramethylammonium tetracyanoborate (Me 4 NTCB) as a white solid product (yield: 26.5 g (140 mmol), yield: 70%).
- Me 4 NTCB tetramethylammonium tetracyanoborate
- Synthesis Example 11 Synthesis of tributylammonium tetracyanoborate Synthesis of crude product and treatment with activated carbon in the same manner as in Synthesis Example 5-1, except that 44.4 g (200 mmol) of tributylammonium chloride was used instead of Et 3 MeNCl. And yellow solid tributylammonium tetracyanoborate (Bu 3 NHTCB) was obtained as a product (yield: 48.2 g (160 mmol), yield: 80%). The product showed an NMR spectrum similar to that of Synthesis Example 3-16.
- Synthesis Example 11-2 Bu 3 NHTCB obtained in Synthesis Example 11-1 was mixed with hydrogen peroxide water (30 mass% H 2 O 2 aqueous solution) having a mass 2.25 times that of Bu 3 NHTCB, and the mixture was mixed at 50 ° C. for 60 minutes. Stir. Thereafter, extraction and drying were performed in the same manner as in Synthesis Example 5-1. Thus, a yellow solid Bu 3 NHTCB was obtained (yield: 39 g (0.13 mmol), yield: 65%).
- Example 6 In Example 6, calculation of the highest occupied orbital energy level of various anions having a structure represented by the general formula [(NC) v -X d- ] (Experimental Example 5), and the actually synthesized anion The withstand voltage range LSV was measured (Experimental Example 6).
- Experimental Example 6 Linear sweep voltammetry (LSV measurement) In Experimental Example 6, the withstand voltage range LSV of the actually synthesized anion was measured. The LSV measurement was performed as follows.
- the withstand voltage range was measured using a standard voltammetric tool HSV-100 (trade name, manufactured by Hokuto Denko Co., Ltd.) using a triode cell in an atmosphere of 30 ° C. in a glove box.
- the measurement conditions are as follows.
- Experimental Example 6-2 A commercially available triethylmethylammonium tetrafluoroborate (TEMABF4) (manufactured by Kishida Chemical Co., Ltd.) 2.0 mol / LPC solution was diluted to 1.0 mol / L, and LSV measurement was performed. The results are shown in FIG.
- TEMABF4 triethylmethylammonium tetrafluoroborate
- the ion conductive material of the present invention has a wide potential window and does not contain harmful elements such as F and As, it can be suitably used for applications such as lithium ion batteries, lithium ion capacitors, electric double layer capacitors and electrolytic capacitors.
- the ionic compounds having tetracyanoborate obtained by the production method of the present invention are various electrochemical devices such as lithium secondary batteries, electrolytic capacitors, electric double layer capacitors and ion conductors (electrolyte materials etc.) such as lithium ion capacitors. It is suitably used for various applications such as a constituent material, a reaction solvent for organic synthesis, a conductivity imparting agent to a polymer, a lubricant, and a gas absorbent.
- the ionic compound of the present invention when used, it is possible to provide a highly reliable electrolytic solution material, and additives and lubricants such as a conductivity imparting agent.
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Abstract
Description
本発明のイオン性化合物は、下記一般式(I)で表されるイオン性化合物であって、当該イオン性化合物100mol%に対して、フッ素原子を含有する不純物の含有量が3mol%以下であるところに特徴を有する。
次に、本発明のイオン性化合物の製造方法について説明する。
本発明のイオン性化合物の製造方法は、下記一般式(I)で表されるテトラシアノボレートイオンを有するイオン性化合物の製造方法であって、Ma(CN)n(Maは、Zn2+,Ga3+,Pd2+,Sn2+,Hg2+,Rh2+,Cu2+およびPb+のいずれかを示し、nは1~3の整数である)と、ホウ素化合物、を含む出発原料を反応させるところに特徴を有する。
上記シアン化物Ma(CN)nの中でも好ましいものは、Zn(CN)2,Ga(CN)3,Pd(CN)2,Sn(CN)2,Hg(CN)2およびCu(CN)2よりなる群から選ばれる少なくとも1種である。
上記ホウ素化合物としては、ホウ素を含むものであれば特に限定はされない。例えば、McBXc 4(Mcは、水素原子又はアルカリ金属原子、Xcは、水素原子、水酸基若しくはハロゲン原子を表す。以下、同様。)、BXc 3、BXc 3-錯体、B(OR13)3(R13は、水素原子、若しくはアルキル基を示す。以下、同様。)、B(OR13)3-錯体、Na2B4O7、ZnO・B2O3およびNaBO3よりなる群から選ばれる少なくとも1種であるのが好ましい。
次に、第2の製造方法について説明する。本発明の第2のイオン性化合物の製造方法とは、下記一般式(VI)で表されるシアン化アンモニウム系化合物と、ホウ素化合物とを反応させて下記一般式(I)で表されるイオン性化合物を得るところに特徴を有するものである。
まず、上記一般式(VI)で表されるシアン化アンモニウム系化合物について説明する。
本発明の第2の製造方法では、上記シアン化アンモニウム系化合物とホウ素化合物とを含む出発原料を反応させることで、上記一般式(I)で表されるイオン性化合物を合成する。上記ホウ素化合物としては、ホウ素を含む化合物であれば特に限定はされず、上記第1の製造方法と同様のものが使用できる。
本発明のイオン性化合物の第3の製造方法とは、トリメチルシリルシアニド(TMSCN)と、アミン及び/又はアンモニウム塩と、ホウ素化合物とを反応させて下記一般式(I)で表されるイオン性化合物を得るところに特徴を有するものである。
まず、出発原料であるトリメチルシリルシアニドから説明する。
TMSX1+HCN+Et3N→TMSCN+Et3NHX1 (XI-1)
TMS-NH-TMS+2HCN→2TMSCN+NH3 (XI-2)
TMSX1+[TMS-NH-TMS]+3HCN→3TMSCN+NH4X1 (XI-3)
4TMSCN+BX2 3+R4NX3→R4N[TCB]+3TMSX2+TMSX3 (XI-4)
(X2、X3は、OR、ハロゲン原子または水酸基を表す)
本発明の第3の製造方法では、上記TMSCNと、アミン及び/又はアンモニウム塩と、ホウ素化合物とを含む出発原料を反応させることにより、上記一般式(I)で表されるイオン性化合物を合成する。上記ホウ素化合物としては、ホウ素を含む化合物であれば特に限定はされず、上記第1の製造方法と同様のものが使用できる。
本発明において上記TMSCNとホウ素化合物との反応は、アミン及び/又はアンモニウム塩の存在下で行う。アミンは反応系内でアンモニウム塩となり、生成したアンモニウム塩が、反応系内で別途生成しているトリメチルシリルをカチオンとするTCB化合物のトリメチルシリルカチオンと交換することで、TCBを含む安定なイオン性化合物を収率よく得ることができる。また、アミン及び/又はアンモニウム塩を用いるため、カチオン交換反応を行うことなく、一段階でアンモニウムをカチオン成分とするイオン性化合物を得ることができる。
次に、第4の製造方法について説明する。本発明のイオン性化合物の第4の製造方法とは、シアン化水素と、アミンと、ホウ素化合物とを反応させて下記一般式(I)で表されるイオン性化合物を得るところに特徴を有するものである。
上述のように、本発明第4の製造方法では、シアン源としてシアン化水素を使用する。シアン化水素は、気体であっても、また、液体であってもよく、さらに、シアン化水素を水または有機溶媒に溶解した溶液として用いることもできる。なお、取り扱い性のよさからは液体又は溶液状のシアン化水素を用いるのが好ましい。
次に、アミンについて説明する。第4の製造方法では、アミンを出発原料として用いる。本発明で使用可能なアミンとしては、上記一般式(XII)で表されるアミンが好ましく、具体的なアミンとしては、上記第3の製造方法で用いるものと同様のものが挙げられる。
第4の製造方法では、上記シアン化水素と、アミンと、ホウ素化合物とを含む出発原料を反応させることで、上記一般式(I)で表されるイオン性化合物を合成する。上記ホウ素化合物としては、ホウ素を含む化合物であれば特に限定はされず、上記第1の製造方法と同様のものが使用できる。
本発明法により得られたイオン性化合物は、さらに、カチオン交換反応を行ってもよい。後述するように、本発明に係るイオン性化合物の特性はカチオン種に依存するので、カチオン交換を行うことで、特性の異なるイオン性化合物を容易に得ることができる。
本発明の製造方法は、さらに、上記第1から第4の製造方法により得られた生成物(イオン性化合物)と、酸化剤とを接触させる工程を含むものであるのが好ましい。上記第1から第4の製造方法に続けてカチオン交換反応を行う場合、生成物であるイオン性化合物と酸化剤との接触は、カチオン交換反応前後のいずれで行ってもよく、また、カチオン交換反応前後の両方で行ってもよい。
上記酸化剤処理に用いる酸化剤としては、過酸化水素、過塩素酸ナトリウム、過酢酸、メタクロロ過安息香酸(mCPBA)などの過酸化物、過マンガン酸カリウム、酸化マンガンなどのマンガン化合物、二クロム酸カリウムなどのクロム化合物、塩素酸カリウム、臭素酸ナトリウム、臭素酸カリウム、次亜塩素酸ナトリウム、二酸化塩素などの含ハロゲン化合物、硝酸、クロラミンなどの無機窒素化合物、酢酸、四酸化オスミウムなどが挙げられる。これらの中でも過酸化物が好ましく、過酸化水素、過塩素酸ナトリウムがより好ましい。特に、酸化剤に過酸化水素を用いた場合には、塩化物イオン(Cl-)、シアン酸イオン(NCO-)などの不純物が過酸化水素水層に効率よく分配され、イオン性化合物の抽出効率が向上するので特に好ましい。また、過酸化水素を用いた場合には、不純物のうち吸湿性のものや、水和しやすい成分が過酸化水素水層に効率よく分配されるため、イオン性化合物の純度が上がると同時に、イオン性化合物中の水分量も容易に低減できる。
本発明の製造方法では、イオン性化合物中の不純物量を一層低減させるため、上記酸化剤処理以外の従来公知の精製方法を採用してもよい。従来公知の精製方法としては、例えば、水、有機溶媒、およびこれらの混合溶媒での洗浄;吸着精製法;再沈殿法;分液抽出法;再結晶法;晶析法;クロマトグラフィーによる精製法などが挙げられる。これらの精製法は組み合わせて行ってもよい。
本発明に係るイオン性化合物Kt[B(CN)4]mは、カチオン[Kt]m+を選択することで、100℃以下で液体の状態をとるイオン性液体となる点が特徴の一つとして挙げられる。したがって、上記製造方法により得られる本発明に係るイオン性化合物は、一次電池、リチウム(イオン)二次電池や燃料電池などの充放電機構を有する電池、電解コンデンサ、電気二重層キャパシタ、太陽電池、エレクトロクロミック表示素子、電気化学式ガスセンサなどの電気化学デバイスを構成する材料として好適に用いられる。
上述のように、本発明のイオン性化合物は、[B-(CN)4]-で表されるテトラシアノボレートをアニオンとして含むものであるが、上記アニオン以外に、下記一般式(XVI)で表されるアニオンを有するイオン性化合物を含むイオン伝導性材料も本発明に含まれる。
リチウム二次電池は、正極、負極、正極と負極との間に介在するセパレータ及び本発明のイオン伝導性材料を用いてなるイオン伝導体を基本構成要素として構成されるものである。この場合、本発明に係る電解液用材料には電解質としてリチウム塩が含有されていることになる。このようなリチウム二次電池としては、水電解質以外のリチウム二次電池である非水電解質リチウム二次電池であることが好ましい。このリチウム二次電池は、後述する負極活物質としてコークスを用い、正極活物質としてCoを含有する化合物を用いたものであるが、このようなリチウム二次電池おいて、充電時には、負極においてC6Li→6C+Li+eの反応が起こり、負極表面で発生した電子(e)は、電解液中をイオン伝導して正極表面に移動し、正極表面では、CoO2+Li+e→LiCoO2の反応が起こり、負極から正極へ電流が流れることになる。放電時には、充電時の逆反応が起こり、正極から負極へ電流が流れることになる。このように、イオンによる化学反応により電気を蓄えたり、供給したりすることとなる。
電解コンデンサは、陽極箔、陰極箔、陽極箔と陰極箔との間に挟まれたセパレータである電解紙、リード線及び本発明のイオン伝導性材料を用いてなるイオン伝導体を基本構成要素として構成されているものである。このような電解コンデンサとしては、アルミ電解コンデンサが好適である。このようなアルミ電解コンデンサとしては、電解エッチングで細かな凹凸を作って粗面化したアルミ箔の表面に電解陽極酸化によって形成した薄い酸化被膜(酸化アルミニウム)を誘電体とするものが好適である。
電気二重層キャパシタは、負極、正極及び本発明のイオン伝導性材料を用いてなるイオン伝導体を基本構成要素として構成されているものであり、好ましい形態としては、対向配置した正極及び負極からなる電極素子に、イオン伝導体である電解液を含ませたものである。
リチウムイオンキャパシタとは、一般的な電気二重層キャパシタの原理を使いながら負極材料としてリチウムイオン吸蔵可能な炭素系材料を使い、そこにリチウムイオンを添加することでエネルギー密度を向上させたキャパシタであり、正極と負極とで充放電の原理が異なり、リチウムイオン二次電池の負極と電気二重層の正極を組み合わせた構造を持っている。
Varian社製「Unity Plus」(400MHz)を用いて、1H-NMRおよび13C-NMRスペクトルを測定し、プロトンおよびカーボンのピーク強度に基づいて試料の構造を分析した。11B-NMRスペクトルの測定には、Bruker社製「Advance 400M」(400MHz)を使用した。
下記実施例で得られたイオン性化合物をγ-ブチロラクトン(GBL)に溶解させ、濃度35質量%のイオン性化合物溶液を調製した。
イオン伝導度の測定と同様にして35質量%のイオン性化合物溶液を調製した。
下記合成例で得られたイオン性化合物10mgをアルミパンに入れ、5℃/minで昇温し、初期質量から2%減少したときの温度を示差熱熱重量同時測定装置(セイコーインスツルメンツ社製「EXSTAR6000 TG/DTA」)を用いて測定した。
実施例1では、出発原料にシアン化物Ma(CN)nを用いて、テトラシアノボレートを含むイオン性化合物を合成した。
攪拌装置、滴下漏斗、および、還流管を備えた容量50mlのフラスコ内を窒素置換し、窒素雰囲気下室温で、ここに、テトラブチルアンモニウムブロミド5.1mg(15.8mmol)、シアン化亜鉛(II)9.26g(78.9mmol)、トルエン10ml、三臭化ホウ素2.8g(11.2mmol)を加えた後、130℃のオイルバスで内容物を加熱しながら2日間攪拌した。2日後、フラスコ内のトルエンを減圧留去し、黒色固体を得た。得られた固体を乳鉢で粉砕した後、攪拌装置を備えたビーカーに入れ、ここにクロロホルム200mlを2回加えて、生成物をクロロホルム層に抽出した。次いで、得られたクロロホルム溶液を分液ロートに移し、200mlの水で洗浄した後、有機層を分離し、エバポレーターで濃縮し、油状の粗生成物を得た。これを、中性アルミナを充填剤とするカラムクロマトグラフィー(展開溶媒、ジエチルエーテルとクロロホルムの混合溶液)で精製し、生成物の含まれる留分を分取し、溶媒を留去し、乾固させて、生成物であるテトラブチルアンモニウムテトラシアノボレートを得た(黄色固体、収量:1.4g(3.9mmol)収率:35%、融点:90℃)。
1H-NMR(d6-DMSO):δ 3.16(m,8H),1.56(m,8H),1.30(ddq,J=11Hz,J=11Hz,J=7.2Hz,8H),0.92(t,J=7.2Hz、12H)
13C-NMR(d6-DMSO):δ 121.9(m),57.7(s),39.1(s),19.4(s),13.7(s)
11B-NMR(d6-DMSO)δ -39.6(s)
テトラブチルアンモニウムブロミドの代わりに1-エチル-3-メチルイミダゾリウムブロミド3.0g(15.8mmol)を用いたこと以外は合成例1-1と同様の操作を行い、1-エチル-3-メチルイミダゾリウムテトラシアノボレートを得た(黄色油状物、収量:1.0g(4.4mmol)、収率:38%、融点:15℃)。
1H-NMR(d6-DMSO)δ 8.41(s,1H),7.34(d,J=21.6Hz,2H),3.81(s,3H),1.45(t,J=7.2Hz,3H)
13C-NMR(d6-DMSO)δ 136.5(s),132.2(m),122.9(s),45.8(s),36.8(s),15.4(s)
11B-NMR(d6-DMSO)δ -39.6(s)
テトラブチルアンモニウムブロミドの代わりにトリエチルアンモニウムブロミド2.9g(15.8mmol)を用いたこと以外は合成例1-1と同様の操作を行い、トリエチルアンモニウムテトラシアノボレートを得た(黄色固体、収量:1.0g(4.5mmol)、収率:40%、融点:150℃)。
1H-NMR(d6-DMSO)δ 8.83(s,1H),3.10(q,J=7.2Hz,6H),1.17(t,J=7.2Hz,9H)
13C-NMR(d6-DMSO)δ 121.9(m),46.0(s),8.8(s)
11B-NMR(d6-DMSO)δ -39.6(s)
テトラブチルアンモニウムブロミドの代わりにトリエチルメチルアンモニウムブロミド3.1g(15.8mmol)を用いたこと以外は合成例1-1と同様の操作を行い、トリエチルメチルアンモニウムテトラシアノボレートを得た(黄色固体、収量:1.2g(5.0mmol)、収率:45%、融点:115℃)。
1H-NMR(d6-DMSO)δ 3.23(q,J=6.8Hz,6H),2.86(s,3H),1.18(t,J=6.8Hz,9H)
13C-NMR(d6-DMSO)δ 122.5(m),55.2(s),46.2(s),7.7(s)
11B-NMR(d6-DMSO)δ -39.6(s)
テトラブチルアンモニウムブロミドの代わりにテトラエチルアンモニウムブロミド3.3g(15.8mmol)を用いたこと以外は合成例1-1と同様の操作を行い、テトラエチルアンモニウムテトラシアノボレートを得た(黄色固体、収量:1.1g(4.5mmol)、収率:40%)。
1H-NMR(d6-DMSO)δ 3.21(q,J=7.4Hz,8H),1.50(tt,J=7.4Hz,12H)
13C-NMR(d6-DMSO)δ 121.9(m),51.5(s),7.4(s)
11B-NMR(d6-DMSO)δ -39.6(s)
テトラブチルアンモニウムブロミドの代わりにテトラブチルアンモニウムクロリド4.4g(15.8mmol)を用いたこと以外は合成例1-1と同様の操作を行い、テトラブチルアンモニウムテトラシアノボレートを得た(黄色固体、収量:1.6g(4.5mmol)、収率:40%、融点:90℃)。
攪拌装置、滴下漏斗、および、還流管を備えた容量50mlのフラスコ内を窒素置換し、窒素雰囲気下室温で、ここに、テトラブチルアンモニウムブロミド5.1g(15.8mmol)、シアン化亜鉛(II)9.26g(78.9mmol)、1.0Mの三塩化ホウ素p-キシレン溶液11.2ml(11.2mmol)を加えた後、150℃のオイルバスで2日間内容物を加熱しながら攪拌した。2日後、フラスコ内の有機溶媒を減圧留去し、黒色固体を得た。得られた固体を乳鉢で粉砕した後、攪拌装置を備えたビーカーに入れ、ここにクロロホルム200mlを2回加えて、生成物をクロロホルム層に抽出した。次いで、得られたクロロホルム溶液を分液ロートに移し、200mlの水で洗浄した後、有機層を分離し、エバポレーターで濃縮し、油状の粗生成物を得た。これを、中性アルミナを充填剤とするカラムクロマトグラフィー(展開溶媒、ジエチルエーテルとクロロホルムの混合溶液)で精製し、生成物の含まれる留分を分取し、溶媒を留去し、乾固させて、生成物であるテトラブチルアンモニウムテトラシアノボレートを得た(黄色固体、収量:2.4g(6.8mmol)収率:61%、融点:90℃)。
攪拌装置、滴下漏斗、および、還流管を備えた容量100mlの三口フラスコに、室温で、シアン化カリウム10.4g(160mmol)、テトラブチルアンモニウムブロミド10.2g(32mmol)、三臭化ホウ素5.7g(22.7mmol)およびトルエン18.9g(205mmol)を加えた後、130℃のオイルバスで内容物を加熱し還流させながら7日間攪拌した。7日後、フラスコ内のトルエンを減圧留去し、ここに100mlのクロロホルムを加え、室温で30分間攪拌した。次いで、溶液をろ過して沈殿物を除去した後、ろ液を濃縮し、油状の粗生成物を得た。これを、中性アルミナを充填剤とするカラムクロマトグラフィー(展開溶媒、ジエチルエーテル:クロロホルム=1:1(体積比))で精製したが、テトラブチルアンモニウムテトラシアノボレートは全く生成しておらず、出発原料であるテトラブチルアンモニウムブロミドが残存していることが確認された。
合成例1-2で合成した1-エチル-3-メチルイミダゾリウムテトラシアノボレートと、不純物として1-エチル-3-メチルイミダゾリウムテトラフルオロボレート(EtMeImBF4)(有機合成用、和光純薬工業株式会社より入手)とを下記表2に示す組成で混合した混合物について、熱分解開始温度を測定した。なお、測定は、下記熱分解開始温度の測定2に従って行った。結果を表2に示す。
下記表2に示す組成を有するイオン性化合物5mgをアルミパンに入れ、230℃までは10℃/min、230℃から350℃までは0.5℃/minで昇温し、初期質量から2%減少したときの温度を示差熱熱重量同時測定装置(セイコーインスツルメンツ社製「EXSTAR6000 TG/DTA」)を用いて測定した。
末端水素基を有するエチレンオキサイド/プロピレンオキサイド共重合体90部に、合成例1-2で合成した1-エチル-3-メチルイミダゾリウムテトラシアノボレートを導電性付与剤として10部加え、温度70℃で加熱混練し、樹脂組成物を得た。
合成例1-2で合成した1-エチル-3-メチルイミダゾリウムテトラシアノボレートの流動点、動粘度および摩擦係数を評価した。
合成例2では、出発原料にシアン化アンモニウム化合物を用いて、テトラシアノボレートをアニオンとするイオン性化合物を合成した。
攪拌装置、及び、滴下漏斗を備えた容量2lのフラスコに、塩化メチレン200ml、テトラブチルアンモニウムスルホキシド67.6g(200mmol)を入れて攪拌した後、この溶液に4M NaOH水溶液50mlを加え、攪拌した。この塩化メチレン溶液に、予め、水20mlに溶解させたシアン化ナトリウム10g(204mmol)を滴下ロートより滴下して加えた後、室温(25℃)で、30分攪拌した。得られた懸濁液をろ過し、ろ液を濃縮し、油状の粗テトラブチルアンモニウムシアニド58.7gを得た。
攪拌装置、滴下漏斗、及び、還流管を備えた容量50mlのフラスコ内を窒素置換し、窒素雰囲気下室温でテトラブチルアンモニウムブロミド0.64g(2.0mmol)、テトラブチルアンモニウムシアニド2.65g(9.9mmol)、三臭化ホウ素0.35g(1.4mmol)、トルエン1.4mlを加えた後、130℃のオイルバスで内容物を加熱しながら2日間攪拌した。2日後、フラスコ内のトルエンを減圧留去し、黒色固体を得た。
イオン伝導度(25℃):0.009S/cm
熱分解開始温度:210℃
電位窓:-3.2V~2.0V
1H-NMR(d6-DMSO):δ3.16(m,8H),1.56(m,8H),1.30(ddq,J=11Hz,J=11Hz,J=7.2Hz,8H),0.92(t,J=7.2Hz、12H)
13C-NMR(d6-DMSO):δ121.9(m),57.7(s),39.1(s),19.4(s),13.7(s)
11B-NMR(d6-DMSO)δ-39.6(s)
三臭化ホウ素の代わりに三塩化ホウ素1.4ml(1.4mmol、1M p-キシレン溶液、アルドリッチ社製)を用い、トルエンを用いなかったこと以外は、合成例2-1と同様の操作を行い、生成物であるテトラブチルアンモニウムテトラシアノボレートを得た(黄色固体、収量:0.21g(0.6mmol)、収率:42%、融点:90℃)。
テトラブチルアンモニウムブロミドを用いなかったこと以外は合成例2-2と同様の操作を行い、生成物であるテトラブチルアンモニウムテトラシアノボレートを得た(黄色固体、収量:0.18g(0.5mmol)、収率:35%、融点:90℃)。
攪拌装置、滴下漏斗、及び、還流管を備えた容量50mlのフラスコ内を窒素置換し、窒素雰囲気下室温でテトラブチルアンモニウムブロミド0.64g(2.0mmol)、テトラブチルアンモニウムシアニド1.65g(6.2mmol)、ホウ酸トリエチル0.20g(1.4mmol)、ジメチルスルホキシド1.4mlを加えた後、170℃のオイルバスで内容物を加熱しながら2日間攪拌した。2日後、フラスコ内の有機溶媒を減圧留去し、黒色固体を得た。
攪拌装置、滴下漏斗、及び、還流管を備えた容量2lのフラスコに、原料合成で得られた未精製のテトラブチルアンモニウムシアニド58.7g、テトラブチルアンモニウムブロミド11.6g(36.3mmol)を加え、フラスコ内を窒素置換した後、滴下漏斗より1M三塩化ホウ素 p-キシレン溶液26ml(26mmol)を室温で系内に滴下した。反応液を150℃に加熱しながら2日間攪拌した後、溶媒を留去し、得られた残渣を、中性アルミナを充填剤とするカラムクロマトグラフィー(展開溶媒:ジクロロエタンとジエチルエーテルを1:1(体積比)で混合した混合溶媒)により精製し、テトラブチルアンモニウムシアノボレートを得た(収量:3.2g(9mmol)、収率:35%)。
攪拌装置、滴下漏斗、及び、還流管を備えた容量50mlのフラスコ内を窒素置換し、窒素雰囲気下、室温で、テトラブチルアンモニウムブロミド0.65g(2.0mmol)、テトラブチルアンモニウムシアニド2.98g(11.0mmol)および1M三塩化ホウ素 p-キシレン溶液2.0ml(2.0mmol)を加えた後、150℃のオイルバスで内容物を加熱しながら2日間攪拌した。その後、溶媒を留去して黒色の個体を得た。
テトラブチルアンモニウムブロミドを用いなかったこと、テトラブチルアンモニウムシアニドの代わりにトリエチルメチルアンモニウムシアニド1.56g(11mmol)を用いたこと以外は合成例14と同様の操作を行い、生成物としてトリエチルメチルアンモニウムテトラシアノボレート(Et3MeNTCB)を得た(淡黄色固体、収量:0.23g(1mmol)、収率:50%、融点:115℃)。生成物は、合成例1-4と同様のNMRデータを示していた。
実施例3では、出発原料としてトリメチルシリルシアニドを用い、テトラシアノボレートを含むイオン性化合物を合成した。
攪拌装置、還流管および抜き出し装置、滴下ロートを備えた容量1Lのなすフラスコに、予め加熱乾燥しておいたトリエチルメチルアンモニウムクロリド(Et3MeNCl)30.3g(200mmol)を加えた。容器内を窒素置換した後、トリメチルシリルシアニド(TMSCN)109.0g(1100mmol)を室温で加え、攪拌し、混合した。次いで、滴下ロートから三塩化ホウ素の1mol/L p-キシレン溶液200mL(200mmol)をゆっくり滴下した。滴下終了後、反応容器を150℃まで加熱し、副生するトリメチルシリルクロリド(TMSCl、沸点:約57℃)を還流抜き出し部から抜き出しながら反応を行った。
イオン伝導度(25℃):0.018S/cm
熱分解開始温度:280℃
電位窓:-3.2V~2.0V
1H-NMR(d6-DMSO)δ 3.23(q,J=6.8Hz,6H),2.86(s,3H),1.18(t,J=6.8Hz,9H)
13C-NMR(d6-DMSO)δ 112.5(m),55.2(s),46.2(s),7.7(s)
11B-NMR(d6-DMSO)δ -39.6(s)
活性炭濾過の代わりにカラムクロマトグラフィーによる精製を行ったこと以外は、合成例3-1と同様にして、トリエチルメチルアンモニウムテトラシアノボレート(淡黄色固体)を得た(収量:37.9g(164mmol)、収率:82%、融点:115℃)。
合成例3-1において用いたEt3MeNClの代わりにテトラブチルアンモニウムブロミド64.5g(200mmol)を用いたこと以外は、合成例3-1と同様の操作を行い、生成物として白色固体のテトラブチルアンモニウムテトラシアノボレートを得た(収量:60.0g(196mmol)、収率:98%、融点:90℃)。生成物は、合成例1-1と同様のNMRスペクトル、各種物性を示していた。
イオン伝導度(25℃):0.009S/cm
熱分解開始温度:210℃
電位窓:-3.2V~2.0V
Et3MeNClの代わりに1-エチル-3-メチルイミダゾリウムブロミド38.2g(200mmol)を用いたこと以外は実施例1と同様の操作を行い、生成物として淡黄色液体の1-エチル-3-メチルイミダゾリウムテトラシアノボレートを得た(収量:24.9g(110mmol)、収率:55%、融点:15℃)。生成物は、合成例1-2と同様のNMRスペクトル、各種物性を示していた。
イオン伝導度(25℃):0.021S/cm
熱分解開始温度:330℃
電位窓:-2.4V~2.0V
Et3MeNClの代わりにトリエチルアミン20.2g(200mmol)を用いたこと以外は合成例3-1と同様の操作を行い、生成物として淡黄色固体のトリエチルアンモニウムテトラシアノボレートを得た(収量:23.8g(110mmol)、収率:60%、融点:150℃)。生成物は、合成例1-3と同様のNMRスペクトル、各種物性を示していた。
イオン伝導度(25℃):0.018S/cm
熱分解開始温度:285℃
電位窓:-1.7V~2.0V
Et3MeNClの代わりにトリエチルアンモニウムクロリド27.5g(200mmol)を用いたこと以外は合成例3-1と同様の操作を行い、生成物として淡黄色固体のトリエチルアンモニウムテトラシアノボレートを得た(収量:23.8g(110mmol)、収率:60%、融点:150℃)。生成物は、合成例3-5と同様のNMRスペクトル、各種物性を示していた。
Et3MeNClの代わりにテトラエチルアンモニウムクロリド33.1g(200mmol)を用いたこと以外は合成例3-1と同様の操作を行い、生成物として白色固体のテトラエチルアンモニウムテトラシアノボレートを得た(収量:46.6g(190mmol)、収率:95%、融点:150℃)。生成物は、合成例1-5と同様のNMRスペクトルを示していた。
イオン伝導度(25℃):0.015S/cm
熱分解開始温度:220℃
電位窓:-3.0V~2.0V
なすフラスコの代わりに1Lの耐圧容器(ステンレス鋼製、5kPaの加圧条件下で使用可能)を用い、反応中に副生するTMSClを抜き出さなかったこと以外は、合成例3-1と同様の操作を行い、生成物として淡黄固体のテトラエチルアンモニウムテトラシアノボレートを得た(収量:33.3g(144mmol)、収率:72%、融点:115℃)。なお、得られた生成物は、合成例3-1と同様のNMRスペクトル、各種物性を示していた。
三塩化ホウ素の代わりに、ホウ酸トリメチル20.8g(200mmol)を用い、反応容器を170℃まで加熱したこと以外は合成例3-3と同様の操作を行い、生成物として白色固体のテトラブチルアンモニウムテトラシアノボレートを得た(収量:50.0g(140mmol)、収率:70%、融点:90℃)。なお、得られた生成物は、合成例3-3と同様のNMRスペクトル、各種物性を示していた。
三塩化ホウ素の代わりに、ホウ酸トリエチル29.2g(200mmol)を用い、反応容器を170℃まで加熱したこと以外は合成例3-3と同様の操作を行い、生成物として白色固体のテトラブチルアンモニウムテトラシアノボレートを得た(収量:50.0g(140mmol)、収率:70%、融点:90℃)。なお、得られた生成物は、合成例3-3と同様のNMRスペクトル、各種物性を示していた。
三塩化ホウ素の代わりに、三フッ化ホウ素ジエチルエーテル錯体28.4g(200mmol)を用い、反応容器を170℃まで加熱したこと以外は合成例3-3と同様の操作を行い、生成物として白色固体のテトラブチルアンモニウムテトラシアノボレートを得た(収量:53.6g(150mmol)、収率:75%、融点:90℃)。なお、得られた生成物は、合成例3-3と同様のNMRスペクトル、各種物性を示していた。
p-キシレンの代わりに、酢酸ブチルを用いた以外は合成例3-1と同様の操作を行い、生成物として淡黄色固体のトリエチルメチルアンモニウムテトラシアノボレートを得た(収量:27.7g(120mmol)、収率:55%、融点:115℃)。なお、得られた生成物は、合成例3-1と同様のNMRスペクトル、各種物性を示していた。
合成例3-1と同様の反応を行い、還流抜き出し部から抜き出したTMSCl69.5g(640mmol)を、攪拌装置を備えたフラスコ(容量500mL)に加え、次いで、室温(25℃)で、トリエチルアミン64.7g(640mmol)およびシアン化水素17.3g(640mmol)を加え、一晩攪拌した。得られた生成物を蒸留しTMSCNを得た(無色液体、収量:57.1g(576mmol)、収率:90%)。
Et3MeNAClの代わりにテトラメチルアンモニウムクロリド21.9g(200mmol)を用いたこと以外は合成例3-1と同様の操作を行い、生成物として白色固体のテトラメチルアンモニウムテトラシアノボレートを得た(収量:26.5g(140mmol)、収率:70%)。
1H-NMR(d6-DMSO)δ 3.08(s,12H)
13C-NMR(d6-DMSO)δ 121.9(m),55.3(s)
11B-NMR(d6-DMSO)δ -39.6(s)
Et3MeNClの代わりにアンモニウムクロリド10.7g(200mmol)を用いたこと以外は合成例3-1と同様の操作を行い、生成物として白色固体のアンモニウムテトラシアノボレートを得た(収量:8.0g(60mmol)、収率:30%)。
1H-NMR(d6-DMSO)δ 6~7(broad,4H)
13C-NMR(d6-DMSO)δ 121.9(m)
11B-NMR(d6-DMSO)δ -39.6(s)
Et3MeNClの代わりにトリブチルアンモニウムクロリド44.4g(200mmol)を用いたこと以外は合成例3-1と同様の操作を行い、生成物として黄色固体のトリブチルアンモニウムテトラシアノボレートを得た(収量:48.2g(160mmol)、収率:80%)。
1H-NMR(d6-DMSO)δ 2.98(m,6H),1.4~1.8(m,6H),1.2~1.3(m,6H),0.94(m,9H)
13C-NMR(d6-DMSO)δ 121.9(m),52.7(s),26.2(s),20.3(s),14.4(s)
11B-NMR(d6-DMSO)δ -39.6(s)
攪拌装置を備えた容量500mlのビーカーに、合成例3-16で得られたトリブチルアンモニウムテトラシアノボレート48.2g(160mmol)、酢酸ブチル200g、水酸化リチウム1水和物4.6g(192mmol)および超純水200gを加え、1時間攪拌した。その後、混合液を分液ロートに移し、静置すると、混合液は2層に分離した。この内、下層(水層)を分離、濃縮して得られた淡黄色固体をアセトニトリル200gと混合し、攪拌した。その後、得られた溶液をメンブレンフィルター(0.2μm、PTFE製)でろ過し、溶媒を留去することで、目的物であるリチウムテトラシアノボレート(白色固体)を得た(収量:13.6g(112mmol)、収率:70%)。
7Li-NMR(d6-DMSO)δ 0.02(s)
13C-NMR(d6-DMSO)δ 121.9(m)
11B-NMR(d6-DMSO)δ -39.6(s)
合成例3-1と同様に反応を行い、還流抜き出し部から抜き出したTMSCl69.5g(640mmol)を、攪拌装置を備えたフラスコ(容量500mL)に加え、次いで、室温(25℃)で、ヘキサメチルジシラザン103.2g(640mmol)およびシアン化水素51.9g(1919mmol)を加え、一晩攪拌した。得られた生成物を蒸留しTMSCNを得た(無色液体、収量:171.4g(1727mmol)、収率:90%)。
Et3MeNClを用いなかったこと以外は、合成例3-1と同様の操作を行い、生成物としてトリメチルシリルテトラシアノボレートを得た。収量:1.9g(10mmol)、収率:5%であった。
トリメチルシリルシアニドの代わりに、シアン化カリウム71.6g(1100mmol)を用いた以外は合成例3-1と同様の操作を行ったが、目的物であるトリエチルメチルアンモニウムテトラシアノボレートは全く得られなかった。
トリブチルアンモニウムクロリドの代わりにトリブチルアンモニウムシアニド42.5g(200mmol)、トリメチルシリルシアニド84.8g(855mmol)を用いたこと以外は合成例3-16と同様の操作を行い、生成物として黄色固体のトリブチルアンモニウムテトラシアノボレートを得た(収量:42.5g(141mmol)、収率:75%)。なお、得られた生成物は、合成例3-16と同様のNMRスペクトル、各種物性を示していた。
実施例4では、出発原料にシアン化水素(HCN)を用い、テトラシアノボレートをアニオンとするイオン性化合物を合成した。
昇温装置、攪拌装置および還流管を備えた200mlの3つ口フラスコを窒素置換し、トリブチルアミン10.2g(55mmol)、シアン化水素1.49g(55mmol)を室温で加え、1時間攪拌した。ついで、ここに三塩化ホウ素1.17g(10mmol)、p-キシレン100mlを加え、150℃で2日間、加熱還流した。得られた黒色溶液に、室温で、酢酸ブチル30gを加え攪拌した後、ここに活性炭9g(カルボラフィン(登録商標)-6、日本エンバイロケミカルズ株式会社製)を加え、室温で20分間攪拌した。得られた活性炭懸濁液をメンブレンフィルター(0.5μm、PTFE製)でろ過し、フィルター上の活性炭を30gの酢酸ブチルで洗浄する操作を5回繰返した。得られたろ液と、洗浄液を合わせて、溶媒を留去し、乾燥し黒色固体を得た。
1H-NMR(d6-DMSO)δ 8.8 (br,1H),2.99 (dd,J=8.0Hz,J=16.4Hz,6H),1.52 (m,6H),1.28 (m,6H),0.88 (m,9H)
13C-NMR(d6-DMSO)δ 121.9 (m),46.0 (s),8.8 (s)
11B-NMR(d6-DMSO)δ -39.6 (s)
トリブチルアミンの代わりに、トリエチルアミン5.58g(55mmol)を用いたこと以外は、合成例4-1と同様にして、トリエチルアンモニウムテトラシアノボレート(褐色固体、Et3NHTCB)を得た(収量0.65g(3mmol)、収率30%)。以下に、得られたトリエチルアンモニウムテトラシアノボレートのNMRデータを示す。上記測定方法によって測定した各種物性は以下の通りである。
イオン伝導度(25℃):0.018S/cm
熱分解開始温度:285℃
電位窓:-1.7V~2.0V
1H-NMR(d6-DMSO)δ 8.83 (s,1H),3.10 (q,J=7.2Hz,6H),1.17 (t,J=7.2Hz,9H)
13C-NMR(d6-DMSO)δ 121.9 (m),46.0 (s),8.8 (s)
11B-NMR(d6-DMSO)δ -39.6 (s)
実施例5では、下記合成例5~11で得られたイオン性化合物中に含まれる不純物量を測定した。各種不純物の測定方法は次の通りである。
(1)ICPによる測定(Na,Siの測定)
下記合成例5~11で得られたイオン性化合物2gを超純水(18.2Ω・cm超)で10倍~100倍に希釈して測定溶液とし、ICP発光分析装置 ICPE-9000(島津製作所製)を用いて、イオン性化合物中に含まれるNa,Si量を測定した。
下記合成例で得られたイオン性化合物0.3gを超純水(18.2Ω・cm超)で100倍~1000倍に希釈して測定溶液とし、イオンクロマトグラフィーシステム ICS-3000(日本ダイオネクス株式会社製)を用いて、イオン性化合物中に含まれるハロゲン化物イオンの量を測定した。
分離モード:イオン交換
検出器:電気伝導度検出器 CD-20
カラム:アニオン分析用カラム AS17-C(日本ダイオネクス株式会社製)
下記合成例で得られたイオン性化合物0.1gを超純水(18.2Ω・cm超)で10000倍に希釈して測定溶液とし、イオンクロマトグラフィーシステム ICS-1500(日本ダイオネクス株式社製)を用いて、イオン性化合物中に含まれるシアン化物イオン(CN-)の量を測定した。
分離モード:イオン交換
溶離液:10mmol H2SO4水溶液
再生液:0.5mmol NaOH水溶液
検出器:電気化学検出器 ED-50A
カラム:アニオン分析用カラム ICE-AS1
平沼産業(株)製水分測定装置「AQ-2000」を用いて、試料中の水分量を測定した。なお、試料注入量は0.1mlとし、発生液には「ハイドラナール アクアライトRS-A」(平沼産業株式会社販売)を使用し、対極液には「アクアライトCN」(関東化学株式会社製)を使用した。試料は、外気に触れないよう注射器を用いて試料注入口より注入した。
合成例5-1 トリエチルメチルアンモニウムテトラシアノボレートの合成
<粗生成物の合成>
攪拌装置、還流管および抜き出し装置、滴下ロートを備えた容量1Lのなすフラスコに、予め加熱乾燥しておいたトリエチルメチルアンモニウムクロリド(Et3MeCl)30.3g(200mmol)を加えた。容器内を窒素置換した後、トリメチルシリルシアニド(TMSCN)109.0g(1100mmol)を室温で加え、攪拌し、混合した。次いで、滴下ロートから三塩化ホウ素(BCl3)の1mol/L p-キシレン溶液200mL(200mmol)をゆっくり滴下した。滴下終了後、反応容器を150℃まで加熱し、副生するトリメチルシリルクロリド(TMSCl、沸点:約57℃)を還流抜き出し部から抜き出しながら反応を行った。
ついで、攪拌装置を備えた500mLのビーカー内で、得られた粗生成物46.0gを酢酸エチルに溶解させて、10質量%の酢酸エチル溶液とし、ここに活性炭65g(日本エンバイロケミカルズ株式会社製のカルボラフィン(登録商標))を加え、内温が50℃になるまでウォーターバスで加熱した。その後、50℃で10分間攪拌した後、活性炭懸濁液をメンブレンフィルター(0.2μm、PTFE製)でろ過した。フィルター上の活性炭については、粗生成物の3倍質量の酢酸エチルに懸濁させ、50℃で10分間攪拌して洗浄する操作を5回繰返した。得られたろ液と洗浄液とを混合し、酢酸エチルを減圧下で留去させた後、真空下50℃で加熱乾燥し、淡黄色固体のEt3MeNTCBを得た(収量:37g(160mmol)、収率:80%、融点:115℃)。
攪拌装置、還流管を備えたビーカーに、得られたEt3MeNTCBと、Et3MeNTCBに対して2.25倍の質量の過酸化水素水(30質量%H2O2水溶液)とを加え、50℃で、60分間攪拌した。
次いで、Et3MeNTCBのH2O2溶液に、活性炭処理後のEt3MeNTCBに対して9倍の質量の酢酸ブチルを加え、この混合溶液を攪拌した。その後、混合溶液を遠心分離用の容器(容量:1000mL)に移し、この容器を90秒間振とうした後、遠心分離し(1700rpm、10分間)、得られた酢酸ブチル層(上澄み、有機層)を濃縮した。
抽出処理で得られたEt3MeNTCBを含む酢酸ブチル層を、さらに、減圧下で30分間加熱し(80℃)、粗乾燥させて得られたEt3MeNTCBを乳鉢で粉砕して粉末とした。得られた粉末を、テフロン(登録商標)シートをひいたバット上に広げ、これを減圧乾燥機内に設置し、減圧下、80℃で3日間乾燥させた。
酸化剤処理において、過酸化水素水の代わりに過塩素酸ナトリウムの30質量%水溶液83mLを用いたこと以外は、合成例5-1と同様にして、Et3MeNTCBを合成した。
粗生成物の合成後、活性炭処理を行わなかったこと以外は、合成例5-1と同様にしてEt3MeNTCBを合成した。
合成例5-1で合成した活性炭処理後のEt3MeNTCBをそのまま測定サンプルとして用いた。
合成例5-1で製造した活性炭処理前のEt3MeNTCB46gを0.01mol/LNaOH水溶液104mlを加え、50℃で60分間攪拌した。ついで、Et3MeNTCBのNaOH溶液に、Et3MeNTCBに対して9倍の質量の酢酸ブチルを加え、合成例5-1と同様にして抽出処理を行い、Et3MeNTCBを合成した(活性炭処理、酸化剤処理なし)。
合成例6-1 テトラブチルアンモニウムテトラシアノボレートの合成
合成例5で用いたEt3MeNClの代わりにテトラブチルアンモニウムブロミド64.5g(200mmol)を用いたこと以外は、合成例5-1と同様にして粗生成物の合成、活性炭処理を行い、生成物として白色固体のテトラブチルアンモニウムテトラシアノボレート(Bu4NTCB)を得た(収量:60.0g(164mmol)、収率:82%、融点:90℃)。生成物は、合成例1-1と同様のNMRスペクトルを示していた。
合成例6-1で得られたBu4NTCBを、Bu4NTCBに対して2.25倍の質量の過酸化水素水(30質量%H2O2水溶液)と混合し、50℃で60分間攪拌した。その後、実験例1-1と同様にして、抽出、乾燥処理を行い、白色固体のBu4NTCBを得た(収量:45g(120mmol)、収率:62%)。
合成例7-1 1-エチル-3-メチルイミダゾリウムテトラシアノボレートの合成
Et3MeNClの代わりに1-エチル-3-メチルイミダゾリウムブロミド38.2g(200mmol)を用いたこと以外は合成例5-1と同様にして粗生成物の合成、活性炭処理を行い、生成物として淡黄色油状の1-エチル-3-メチルイミダゾリウムテトラシアノボレート(EtMeImTCB)を得た(収量:24.9g(110mmol)、収率:55%、融点:15℃)。生成物は、合成例1-2と同様のNMRスペクトルを示していた。
合成例7-1で得られたEtMeImTCBを、EtMeImTCBに対して2.25倍の質量の過酸化水素水(30質量%H2O2水溶液)と混合し、50℃で60分間攪拌した。その後、実験例1-1と同様にして、抽出、乾燥処理を行い、淡黄色油状のEtMeImTCBを得た(収量:18g(80mmol)、収率:40%)。
合成例8-1 トリエチルアンモニウムテトラシアノボレートの合成
Et3MeNClの代わりにトリエチルアミン20.2g(200mmol)を用いたこと以外は合成例5-1と同様にして粗生成物の合成、活性炭処理を行い、生成物として淡黄色固体のトリエチルアンモニウムテトラシアノボレート(Et3NHTCB)を得た(収量:23.8g(110mmol)、収率:60%、融点:150℃)。生成物は、合成例1-3と同様のNMRスペクトルを示していた。
合成例8-1で得られたEt3NHTCBを、Et3NHTCBに対して2.25倍の質量の過酸化水素水(30質量%H2O2水溶液)と混合し、50℃で60分間攪拌した。その後、合成例5-1と同様にして、抽出、乾燥処理を行い、淡黄色固体のEt3NHTCBを得た(収量:17g(80mmol)、収率:40%)。
合成例9-1 テトラエチルアンモニウムテトラシアノボレートの合成
Et3MeNClの代わりにテトラエチルアンモニウムクロリド33.1g(200mmol)を用いたこと以外は合成例5-1と同様にして粗生成物の合成、活性炭処理を行い、生成物として白色固体のテトラエチルアンモニウムテトラシアノボレート(Et4NTCB)を得た(収量:46.6g(190mmol)、収率:95%、融点:150℃)。生成物は、合成例1-5と同様のNMRスペクトルを示していた。
合成例9-1で得られたEt4NTCBを、Et4NTCBに対して2.25倍の質量の過酸化水素水(30質量%H2O2水溶液)と混合し、50℃で60分間攪拌した。その後、合成例5-1と同様にして、抽出、乾燥処理を行い、淡黄色固体のEt4NTCBを得た(収量:35g(144mmol)、収率:72%)。
合成例10-1 テトラメチルアンモニウムテトラシアノボレートの合成
Et3MeNClの代わりにテトラメチルアンモニウムクロリド21.9g(200mmol)を用いたこと以外は合成例5-1と同様にして粗生成物の合成、活性炭処理を行い、生成物として白色固体のテトラメチルアンモニウムテトラシアノボレート(Me4NTCB)を得た(収量:26.5g(140mmol)、収率:70%)。
1H-NMR(d6-DMSO)δ 3.08(s,12H)
13C-NMR(d6-DMSO)δ 121.9(m),55.3(s)
11B-NMR(d6-DMSO)δ -39.6(s)
合成例10-1で得られたMe4NTCBを、Me4NTCBに対して2.25倍の質量の過酸化水素水(30質量%H2O2水溶液)と混合し、50℃で60分間攪拌した。その後、合成例5-1と同様にして、抽出、乾燥処理を行い、淡黄色固体のMe4NTCBを得た(収量:11g(100mmol)、収率:50%)。
合成例11-1 トリブチルアンモニウムテトラシアノボレートの合成
Et3MeNClの代わりにトリブチルアンモニウムクロリド44.4g(200mmol)を用いたこと以外は合成例5-1と同様にして粗生成物の合成、活性炭処理を行い、生成物として黄色固体のトリブチルアンモニウムテトラシアノボレート(Bu3NHTCB)を得た(収量:48.2g(160mmol)、収率:80%)。生成物は、合成例3-16と同様のNMRスペクトルを示していた。
合成例11-1で得られたBu3NHTCBを、Bu3NHTCBに対して2.25倍の質量の過酸化水素水(30質量%H2O2水溶液)と混合し、50℃で60分間攪拌した。その後、合成例5-1と同様にして、抽出、乾燥処理を行い、黄色固体のBu3NHTCBを得た(収量:39g(0.13mmol)、収率:65%)。
実施例6では、一般式[(NC)v-Xd-]で表される構造を有する各種アニオンの最高被占位軌道エネルギー準位の計算(実験例5)、および、実際に合成したアニオンの耐電圧範囲LSVの測定(実験例6)を行った。
下記表4に示す各種アニオンの最高被占位軌道エネルギー準位の計算は、GAUSSIAN03(GAUSSIAN,Inc.製)を使用し、基底関数にB3LYP/6-311+G(2d,p)を用いて行った。最高被占位軌道エネルギー準位計算結果を表4に示す。
実験例6では、実際に合成したアニオンの耐電圧範囲LSVを測定した。LSV測定は、以下のようにして測定した。
耐電圧範囲の測定は、グローブボックス中30℃雰囲気下、3極セルを用いてスタンダードボルタンメトリツールHSV-100(商品名、北斗電工社製)を使用してLSV測定を行った。なお、測定条件は下記の通りである。
作用極:グラッシーカーボン電極、参照極:Ag電極、対極:白金電極
溶液濃度:1mol/L
溶媒:プロピレンカーボネート
掃引速度:100mV/s
掃引範囲:自然電位~±5V
合成例1-3で得られたEt3MeNTCBを脱水プロピレンカーボネート(キシダ化学製)に溶解し、1mol/Lに調整したもののLSV測定を行った。結果を図1に示す。
市販のトリエチルメチルアンモニウムテトラフルオロボレート(TEMABF4)(キシダ化学製)2.0mol/LPC溶液を希釈し、1.0mol/LとしたもののLSV測定を行った。結果を図2に示す。
Claims (13)
- 上記一般式(I)で表されるイオン性化合物であって、当該イオン性化合物中のケイ素含有量が2500ppm以下である請求項1に記載のイオン性化合物。
- CN-含有量が3000ppm以下である請求項1または2に記載のイオン性化合物。
- ハロゲン化物イオン含有量が500ppm以下である請求項1~3のいずれかに記載のイオン性化合物。
- さらに、水の含有量が3000ppm以下である請求項1~4のいずれかに記載のイオン性化合物。
- 請求項1~5のいずれかに記載のイオン性化合物を含んでなるイオン導電性材料。
- 上記一般式(I)で表されるイオン性化合物の製造方法であって、シアン化物と、ホウ素化合物とを含む出発原料を反応させることを特徴とするイオン性化合物の製造方法。
- 上記出発原料が、シアン化物としてトリメチルシリルシアニドを含み、さらに、アミン及び/又はアンモニウム塩を含むものである請求項7に記載のイオン性化合物の製造方法。
- 上記シアン化物が、Ma(CN)n(Maは、Zn2+,Ga3+,Pd2+,Sn2+,Hg2+,Rh2+,Cu2+およびPb+のいずれかを示し、nは1~3の整数である)である請求項7に記載のイオン性化合物の製造方法。
- 上記シアン化物が、R4NCN(Rは、Hまたは有機基)で表されるシアン化アンモニウム系化合物である請求項7に記載のイオン性化合物の製造方法。
- 上記出発原料が、上記シアン化物としてシアン化水素を含み、さらに、アミンを含むものである請求項7に記載のイオン性化合物の製造方法。
- 上記出発原料を反応させて得られた粗生成物を、酸化剤と接触させる工程を含む請求項7~11のいずれかに記載のイオン性化合物の製造方法。
- 上記酸化剤が過酸化水素である請求項12に記載のイオン性化合物の製造方法。
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US13/060,161 US9243013B2 (en) | 2008-08-22 | 2009-08-21 | Ionic compound, method for producing the same, and ion-conductive material comprising the same |
EP09808327A EP2327707A4 (en) | 2008-08-22 | 2009-08-21 | IONIC CONNECTION, MANUFACTURING METHOD AND ION-LEADING MATERIAL THEREFOR |
CN2009801322809A CN102124014A (zh) | 2008-08-22 | 2009-08-21 | 离子性化合物及其制备方法以及使用了该离子性化合物的离子传导性材料 |
JP2010525722A JP5913804B2 (ja) | 2008-08-22 | 2009-08-21 | イオン性化合物及びその製造方法、並びに、これを用いたイオン伝導性材料 |
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Also Published As
Publication number | Publication date |
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US20110150736A1 (en) | 2011-06-23 |
CN104387410A (zh) | 2015-03-04 |
JP2014156473A (ja) | 2014-08-28 |
CN102124014A (zh) | 2011-07-13 |
JP5796756B2 (ja) | 2015-10-21 |
JPWO2010021391A1 (ja) | 2012-01-26 |
US9243013B2 (en) | 2016-01-26 |
EP2327707A4 (en) | 2012-05-30 |
JP5913804B2 (ja) | 2016-04-27 |
KR20110055488A (ko) | 2011-05-25 |
EP2327707A1 (en) | 2011-06-01 |
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