US20020095017A1 - Polymer preparation - Google Patents
Polymer preparation Download PDFInfo
- Publication number
- US20020095017A1 US20020095017A1 US10/090,474 US9047402A US2002095017A1 US 20020095017 A1 US20020095017 A1 US 20020095017A1 US 9047402 A US9047402 A US 9047402A US 2002095017 A1 US2002095017 A1 US 2002095017A1
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- United States
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- process according
- polymer
- aromatic
- organic base
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- 229920000642 polymer Polymers 0.000 title claims description 70
- 238000002360 preparation method Methods 0.000 title description 3
- 239000000178 monomer Substances 0.000 claims abstract description 54
- 150000007530 organic bases Chemical class 0.000 claims abstract description 34
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 claims abstract description 32
- 125000003118 aryl group Chemical group 0.000 claims abstract description 28
- 239000011541 reaction mixture Substances 0.000 claims abstract description 24
- 239000003054 catalyst Substances 0.000 claims abstract description 21
- 229920000547 conjugated polymer Polymers 0.000 claims abstract description 19
- 229910052763 palladium Inorganic materials 0.000 claims abstract description 15
- 125000005620 boronic acid group Chemical group 0.000 claims abstract description 14
- UORVGPXVDQYIDP-BJUDXGSMSA-N borane Chemical group [10BH3] UORVGPXVDQYIDP-BJUDXGSMSA-N 0.000 claims abstract description 13
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical group [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 claims abstract description 12
- 238000004519 manufacturing process Methods 0.000 claims abstract description 10
- 125000004185 ester group Chemical group 0.000 claims abstract description 9
- 230000003197 catalytic effect Effects 0.000 claims abstract description 5
- 230000000379 polymerizing effect Effects 0.000 claims abstract description 3
- 125000005843 halogen group Chemical group 0.000 claims abstract 8
- 238000006243 chemical reaction Methods 0.000 claims description 40
- 238000000034 method Methods 0.000 claims description 30
- -1 organic cation salt Chemical class 0.000 claims description 18
- 239000007864 aqueous solution Substances 0.000 claims description 17
- 125000000524 functional group Chemical group 0.000 claims description 17
- 230000003287 optical effect Effects 0.000 claims description 12
- 239000000758 substrate Substances 0.000 claims description 12
- 125000005207 tetraalkylammonium group Chemical group 0.000 claims description 12
- 150000002148 esters Chemical class 0.000 claims description 8
- 239000002904 solvent Substances 0.000 claims description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 8
- 150000007529 inorganic bases Chemical class 0.000 claims description 6
- 125000004169 (C1-C6) alkyl group Chemical group 0.000 claims description 5
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical group [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 claims description 5
- RXACYPFGPNTUNV-UHFFFAOYSA-N 9,9-dioctylfluorene Chemical compound C1=CC=C2C(CCCCCCCC)(CCCCCCCC)C3=CC=CC=C3C2=C1 RXACYPFGPNTUNV-UHFFFAOYSA-N 0.000 claims description 4
- BVKZGUZCCUSVTD-UHFFFAOYSA-M Bicarbonate Chemical class OC([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-M 0.000 claims description 4
- ZADPBFCGQRWHPN-UHFFFAOYSA-N boronic acid Chemical compound OBO ZADPBFCGQRWHPN-UHFFFAOYSA-N 0.000 claims description 4
- 230000008030 elimination Effects 0.000 claims description 4
- 238000003379 elimination reaction Methods 0.000 claims description 4
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 claims description 2
- 206010011416 Croup infectious Diseases 0.000 claims description 2
- 229910052783 alkali metal Inorganic materials 0.000 claims description 2
- 150000004649 carbonic acid derivatives Chemical class 0.000 claims description 2
- 201000010549 croup Diseases 0.000 claims description 2
- 125000004435 hydrogen atom Chemical group [H]* 0.000 claims 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 claims 1
- 229910015444 B(OH)3 Inorganic materials 0.000 abstract description 2
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 51
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 description 30
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 28
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 21
- 239000000203 mixture Substances 0.000 description 21
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 description 15
- 229910052757 nitrogen Inorganic materials 0.000 description 14
- 238000010992 reflux Methods 0.000 description 13
- 238000003756 stirring Methods 0.000 description 13
- NFHFRUOZVGFOOS-UHFFFAOYSA-N palladium;triphenylphosphane Chemical compound [Pd].C1=CC=CC=C1P(C=1C=CC=CC=1)C1=CC=CC=C1.C1=CC=CC=C1P(C=1C=CC=CC=1)C1=CC=CC=C1.C1=CC=CC=C1P(C=1C=CC=CC=1)C1=CC=CC=C1.C1=CC=CC=C1P(C=1C=CC=CC=1)C1=CC=CC=C1 NFHFRUOZVGFOOS-UHFFFAOYSA-N 0.000 description 12
- 239000002585 base Substances 0.000 description 8
- 239000000243 solution Substances 0.000 description 8
- 229940073455 tetraethylammonium hydroxide Drugs 0.000 description 8
- LRGJRHZIDJQFCL-UHFFFAOYSA-M tetraethylazanium;hydroxide Chemical compound [OH-].CC[N+](CC)(CC)CC LRGJRHZIDJQFCL-UHFFFAOYSA-M 0.000 description 8
- 239000001099 ammonium carbonate Substances 0.000 description 7
- 150000004820 halides Chemical group 0.000 description 7
- CYKLQIOPIMZZBZ-UHFFFAOYSA-N 2,7-dibromo-9,9-dioctylfluorene Chemical compound C1=C(Br)C=C2C(CCCCCCCC)(CCCCCCCC)C3=CC(Br)=CC=C3C2=C1 CYKLQIOPIMZZBZ-UHFFFAOYSA-N 0.000 description 6
- QARVLSVVCXYDNA-UHFFFAOYSA-N bromobenzene Chemical compound BrC1=CC=CC=C1 QARVLSVVCXYDNA-UHFFFAOYSA-N 0.000 description 6
- WGTYBPLFGIVFAS-UHFFFAOYSA-M tetramethylammonium hydroxide Chemical compound [OH-].C[N+](C)(C)C WGTYBPLFGIVFAS-UHFFFAOYSA-M 0.000 description 6
- 235000011114 ammonium hydroxide Nutrition 0.000 description 5
- 239000007791 liquid phase Substances 0.000 description 5
- 239000003960 organic solvent Substances 0.000 description 5
- 239000000047 product Substances 0.000 description 5
- 230000035484 reaction time Effects 0.000 description 5
- 150000005622 tetraalkylammonium hydroxides Chemical class 0.000 description 5
- 125000005210 alkyl ammonium group Chemical group 0.000 description 4
- 239000000908 ammonium hydroxide Substances 0.000 description 4
- 239000011521 glass Substances 0.000 description 4
- 239000012454 non-polar solvent Substances 0.000 description 4
- HXITXNWTGFUOAU-UHFFFAOYSA-N phenylboronic acid Chemical compound OB(O)C1=CC=CC=C1 HXITXNWTGFUOAU-UHFFFAOYSA-N 0.000 description 4
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 3
- 238000006069 Suzuki reaction reaction Methods 0.000 description 3
- 235000012538 ammonium bicarbonate Nutrition 0.000 description 3
- 235000012501 ammonium carbonate Nutrition 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 3
- 229920001577 copolymer Polymers 0.000 description 3
- 229920001519 homopolymer Polymers 0.000 description 3
- XKBGEWXEAPTVCK-UHFFFAOYSA-M methyltrioctylammonium chloride Chemical compound [Cl-].CCCCCCCC[N+](C)(CCCCCCCC)CCCCCCCC XKBGEWXEAPTVCK-UHFFFAOYSA-M 0.000 description 3
- 229920000553 poly(phenylenevinylene) Polymers 0.000 description 3
- 229920006254 polymer film Polymers 0.000 description 3
- 238000003786 synthesis reaction Methods 0.000 description 3
- 229910000013 Ammonium bicarbonate Inorganic materials 0.000 description 2
- YNQLUTRBYVCPMQ-UHFFFAOYSA-N Ethylbenzene Chemical compound CCC1=CC=CC=C1 YNQLUTRBYVCPMQ-UHFFFAOYSA-N 0.000 description 2
- JUJWROOIHBZHMG-UHFFFAOYSA-N Pyridine Chemical compound C1=CC=NC=C1 JUJWROOIHBZHMG-UHFFFAOYSA-N 0.000 description 2
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 2
- 239000004809 Teflon Substances 0.000 description 2
- 229920006362 Teflon® Polymers 0.000 description 2
- 239000003513 alkali Substances 0.000 description 2
- 239000005030 aluminium foil Substances 0.000 description 2
- RDOXTESZEPMUJZ-UHFFFAOYSA-N anisole Chemical compound COC1=CC=CC=C1 RDOXTESZEPMUJZ-UHFFFAOYSA-N 0.000 description 2
- 125000000732 arylene group Chemical group 0.000 description 2
- UORVGPXVDQYIDP-UHFFFAOYSA-N borane Chemical compound B UORVGPXVDQYIDP-UHFFFAOYSA-N 0.000 description 2
- 239000006227 byproduct Substances 0.000 description 2
- YCIMNLLNPGFGHC-UHFFFAOYSA-N catechol Chemical compound OC1=CC=CC=C1O YCIMNLLNPGFGHC-UHFFFAOYSA-N 0.000 description 2
- 239000000356 contaminant Substances 0.000 description 2
- 238000000354 decomposition reaction Methods 0.000 description 2
- 238000005187 foaming Methods 0.000 description 2
- 238000004128 high performance liquid chromatography Methods 0.000 description 2
- 230000005525 hole transport Effects 0.000 description 2
- PSHKMPUSSFXUIA-UHFFFAOYSA-N n,n-dimethylpyridin-2-amine Chemical compound CN(C)C1=CC=CC=N1 PSHKMPUSSFXUIA-UHFFFAOYSA-N 0.000 description 2
- 239000003791 organic solvent mixture Substances 0.000 description 2
- 239000012071 phase Substances 0.000 description 2
- 239000003444 phase transfer catalyst Substances 0.000 description 2
- IVDFJHOHABJVEH-UHFFFAOYSA-N pinacol Chemical compound CC(C)(O)C(C)(C)O IVDFJHOHABJVEH-UHFFFAOYSA-N 0.000 description 2
- 239000003495 polar organic solvent Substances 0.000 description 2
- 229920002098 polyfluorene Polymers 0.000 description 2
- 238000006116 polymerization reaction Methods 0.000 description 2
- 238000000746 purification Methods 0.000 description 2
- 239000000376 reactant Substances 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 239000011877 solvent mixture Substances 0.000 description 2
- APBDREXAUGXCCV-UHFFFAOYSA-L tetraethylazanium;carbonate Chemical compound [O-]C([O-])=O.CC[N+](CC)(CC)CC.CC[N+](CC)(CC)CC APBDREXAUGXCCV-UHFFFAOYSA-L 0.000 description 2
- LPSKDVINWQNWFE-UHFFFAOYSA-M tetrapropylazanium;hydroxide Chemical compound [OH-].CCC[N+](CCC)(CCC)CCC LPSKDVINWQNWFE-UHFFFAOYSA-M 0.000 description 2
- WVFDUZNAUQLQQP-UHFFFAOYSA-N 1,2,3,4,5,7,8,9-octahydropyrido[1,2-a][1,3]diazepine Chemical compound N1CCCCN2CCCC=C21 WVFDUZNAUQLQQP-UHFFFAOYSA-N 0.000 description 1
- FNQJDLTXOVEEFB-UHFFFAOYSA-N 1,2,3-benzothiadiazole Chemical class C1=CC=C2SN=NC2=C1 FNQJDLTXOVEEFB-UHFFFAOYSA-N 0.000 description 1
- PZWLRLIAVLSBQU-UHFFFAOYSA-N 1,2-dioctyl-9h-fluorene Chemical compound C1=CC=C2C3=CC=C(CCCCCCCC)C(CCCCCCCC)=C3CC2=C1 PZWLRLIAVLSBQU-UHFFFAOYSA-N 0.000 description 1
- 125000002030 1,2-phenylene group Chemical group [H]C1=C([H])C([*:1])=C([*:2])C([H])=C1[H] 0.000 description 1
- 125000001989 1,3-phenylene group Chemical group [H]C1=C([H])C([*:1])=C([H])C([*:2])=C1[H] 0.000 description 1
- SGUVLZREKBPKCE-UHFFFAOYSA-N 1,5-diazabicyclo[4.3.0]-non-5-ene Chemical compound C1CCN=C2CCCN21 SGUVLZREKBPKCE-UHFFFAOYSA-N 0.000 description 1
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- KRHYYFGTRYWZRS-UHFFFAOYSA-M Fluoride anion Chemical compound [F-] KRHYYFGTRYWZRS-UHFFFAOYSA-M 0.000 description 1
- 239000002879 Lewis base Substances 0.000 description 1
- AFVFQIVMOAPDHO-UHFFFAOYSA-N Methanesulfonic acid Chemical compound CS(O)(=O)=O AFVFQIVMOAPDHO-UHFFFAOYSA-N 0.000 description 1
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 description 1
- 229920001609 Poly(3,4-ethylenedioxythiophene) Polymers 0.000 description 1
- 239000004793 Polystyrene Substances 0.000 description 1
- UIIMBOGNXHQVGW-DEQYMQKBSA-M Sodium bicarbonate-14C Chemical compound [Na+].O[14C]([O-])=O UIIMBOGNXHQVGW-DEQYMQKBSA-M 0.000 description 1
- JFBZPFYRPYOZCQ-UHFFFAOYSA-N [Li].[Al] Chemical compound [Li].[Al] JFBZPFYRPYOZCQ-UHFFFAOYSA-N 0.000 description 1
- 150000001298 alcohols Chemical class 0.000 description 1
- 229910001413 alkali metal ion Inorganic materials 0.000 description 1
- 150000001340 alkali metals Chemical class 0.000 description 1
- 125000002947 alkylene group Chemical group 0.000 description 1
- 235000011162 ammonium carbonates Nutrition 0.000 description 1
- 239000003125 aqueous solvent Substances 0.000 description 1
- 239000003849 aromatic solvent Substances 0.000 description 1
- 150000001616 biphenylenes Chemical class 0.000 description 1
- 229910000085 borane Inorganic materials 0.000 description 1
- 150000001638 boron Chemical class 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 125000001309 chloro group Chemical group Cl* 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000007334 copolymerization reaction Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000006704 dehydrohalogenation reaction Methods 0.000 description 1
- 239000008367 deionised water Substances 0.000 description 1
- 239000000412 dendrimer Substances 0.000 description 1
- 229920000736 dendritic polymer Polymers 0.000 description 1
- 230000001627 detrimental effect Effects 0.000 description 1
- VBXDEEVJTYBRJJ-UHFFFAOYSA-N diboronic acid Chemical compound OBOBO VBXDEEVJTYBRJJ-UHFFFAOYSA-N 0.000 description 1
- 125000000950 dibromo group Chemical group Br* 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000032050 esterification Effects 0.000 description 1
- 238000005886 esterification reaction Methods 0.000 description 1
- AZHSSKPUVBVXLK-UHFFFAOYSA-N ethane-1,1-diol Chemical class CC(O)O AZHSSKPUVBVXLK-UHFFFAOYSA-N 0.000 description 1
- 125000005678 ethenylene group Chemical group [H]C([*:1])=C([H])[*:2] 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 150000002220 fluorenes Chemical class 0.000 description 1
- 125000005549 heteroarylene group Chemical group 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 230000003301 hydrolyzing effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 description 1
- 238000010952 in-situ formation Methods 0.000 description 1
- AMGQUBHHOARCQH-UHFFFAOYSA-N indium;oxotin Chemical compound [In].[Sn]=O AMGQUBHHOARCQH-UHFFFAOYSA-N 0.000 description 1
- 150000007527 lewis bases Chemical class 0.000 description 1
- AUHZEENZYGFFBQ-UHFFFAOYSA-N mesitylene Substances CC1=CC(C)=CC(C)=C1 AUHZEENZYGFFBQ-UHFFFAOYSA-N 0.000 description 1
- 125000001827 mesitylenyl group Chemical group [H]C1=C(C(*)=C(C([H])=C1C([H])([H])[H])C([H])([H])[H])C([H])([H])[H] 0.000 description 1
- UZKWTJUDCOPSNM-UHFFFAOYSA-N methoxybenzene Substances CCCCOC=C UZKWTJUDCOPSNM-UHFFFAOYSA-N 0.000 description 1
- 239000012046 mixed solvent Substances 0.000 description 1
- 150000002790 naphthalenes Chemical class 0.000 description 1
- 150000002892 organic cations Chemical class 0.000 description 1
- 239000011368 organic material Substances 0.000 description 1
- WXHIJDCHNDBCNY-UHFFFAOYSA-N palladium dihydride Chemical class [PdH2] WXHIJDCHNDBCNY-UHFFFAOYSA-N 0.000 description 1
- 125000000843 phenylene group Chemical group C1(=C(C=CC=C1)*)* 0.000 description 1
- 239000002798 polar solvent Substances 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 238000000710 polymer precipitation Methods 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 239000002243 precursor Substances 0.000 description 1
- 230000002028 premature Effects 0.000 description 1
- ULWHHBHJGPPBCO-UHFFFAOYSA-N propane-1,1-diol Chemical class CCC(O)O ULWHHBHJGPPBCO-UHFFFAOYSA-N 0.000 description 1
- UMJSCPRVCHMLSP-UHFFFAOYSA-N pyridine Natural products COC1=CC=CN=C1 UMJSCPRVCHMLSP-UHFFFAOYSA-N 0.000 description 1
- 238000013341 scale-up Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 229910000029 sodium carbonate Inorganic materials 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- WAWBMJIRULKJPO-UHFFFAOYSA-N tetraethylazanium borate Chemical compound [O-]B([O-])[O-].CC[N+](CC)(CC)CC.CC[N+](CC)(CC)CC.CC[N+](CC)(CC)CC WAWBMJIRULKJPO-UHFFFAOYSA-N 0.000 description 1
- 229930192474 thiophene Natural products 0.000 description 1
- 150000003577 thiophenes Chemical class 0.000 description 1
- JOXIMZWYDAKGHI-UHFFFAOYSA-N toluene-4-sulfonic acid Chemical compound CC1=CC=C(S(O)(=O)=O)C=C1 JOXIMZWYDAKGHI-UHFFFAOYSA-N 0.000 description 1
- 125000005270 trialkylamine group Chemical group 0.000 description 1
- 125000005259 triarylamine group Chemical group 0.000 description 1
- IMNIMPAHZVJRPE-UHFFFAOYSA-N triethylenediamine Chemical compound C1CN2CCN1CC2 IMNIMPAHZVJRPE-UHFFFAOYSA-N 0.000 description 1
- ITMCEJHCFYSIIV-UHFFFAOYSA-M triflate Chemical group [O-]S(=O)(=O)C(F)(F)F ITMCEJHCFYSIIV-UHFFFAOYSA-M 0.000 description 1
- 150000004684 trihydrates Chemical class 0.000 description 1
- 239000008096 xylene Substances 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G61/00—Macromolecular compounds obtained by reactions forming a carbon-to-carbon link in the main chain of the macromolecule
- C08G61/02—Macromolecular compounds containing only carbon atoms in the main chain of the macromolecule, e.g. polyxylylenes
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
- H10K50/10—OLEDs or polymer light-emitting diodes [PLED]
- H10K50/11—OLEDs or polymer light-emitting diodes [PLED] characterised by the electroluminescent [EL] layers
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K85/00—Organic materials used in the body or electrodes of devices covered by this subclass
- H10K85/10—Organic polymers or oligomers
- H10K85/111—Organic polymers or oligomers comprising aromatic, heteroaromatic, or aryl chains, e.g. polyaniline, polyphenylene or polyphenylene vinylene
- H10K85/113—Heteroaromatic compounds comprising sulfur or selene, e.g. polythiophene
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K85/00—Organic materials used in the body or electrodes of devices covered by this subclass
- H10K85/10—Organic polymers or oligomers
- H10K85/111—Organic polymers or oligomers comprising aromatic, heteroaromatic, or aryl chains, e.g. polyaniline, polyphenylene or polyphenylene vinylene
- H10K85/115—Polyfluorene; Derivatives thereof
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S323/00—Electricity: power supply or regulation systems
- Y10S323/902—Optical coupling to semiconductor
Definitions
- the present invention relates to a process for preparing a polymer such as a conjugated polymer for use in an optical device such as an electroluminescent device.
- Organic electroluminescent devices which employ an organic material for light emission.
- WO90/13148 describes such a device comprising a semiconductor layer comprising a polymer film which comprises at least one conjugated polymer situated between electrodes.
- the polymer film in this case comprises a poly(para-phenylene vinylene) (PPV) film which is capable of light emission when electrons and holes are injected therein.
- PPV poly(para-phenylene vinylene)
- Other polymer layers capable of transporting holes or transporting electrons to the emissive layer may be incorporated into such devices.
- the bandgap of PPV and other poly(arylene vinylene) polymers may be tuned to modulate the wavelength, quantum efficiency and/or refractive index thereof, as described in EP-A-0544795.
- poly(arylene vinylene)s for use in optical devices has been conveniently carried out by a precursor route where thermal elimination of leaving groups gives rise to a conjugated polymer, or by other routes such as a dehydrohalogenation reaction.
- poly(arylene vinylene)s are not the only class of polymers which are suitable for use in optical devices.
- Other aryl-containing polymers may be useful and one route generally useful in the production of conjugated polymers is the Suzuki reaction (Synthetic Communications 11(7), 513, 1981). This reaction involves the use of a palladium-based catalyst, an aqueous alkaline carbonate or bicarbonate inorganic base and a solvent for the reactants and possibly the polymer product.
- the monomer reactants are typically a diboronic acid or diboronate monomer and a dibromo monomer.
- U.S. Pat. No. 5,777,070 is directed to attempts to improve the Suzuki reaction to form conjugated polymers from aromatic monomers.
- U.S. Pat. No. 5,777,070 indicates that such reactions require as a solvent a non-polar solvent such as toluene.
- non-polar solvents are acknowledged to slow down the rate of reaction.
- U.S. Pat. No. 5,777,040 proposes the use of a phase-transfer catalyst such as tricaprylmethyl ammonium chloride sold under the registered trade mark Aliquat to increase the rate of reaction.
- the reaction mixture contains an organic solvent such as toluene, an aqueous solution of an inorganic base such as sodium bicarbonate, a catalytic amount of a palladium complex and a catalytic amount of the phase transfer catalyst.
- the present invention aims to overcome at least some of the drawbacks mentioned above.
- a process for preparing a conjugated polymer which comprises polymerizing in a reaction mixture (a) an aromatic monomer having at least two boron derivative functional groups selected from a boronic acid group, a boronic ester group and a borane group, and an aromatic monomer having at least two reactive halide functional groups; or (b) an aromatic monomer having one reactive halide functional group and one boron derivative functional croup selected from a boronic acid group, a boronic ester group and a borane group, wherein the reaction mixture comprises a catalytic amount of a catalyst suitable for catalysing the polymerisation of the aromatic monomers, and an organic base in an amount sufficient to convert the boron derivative functional groups into —B(X) 3 ⁇ anionic groups, wherein X is independently selected from the group consisting of F and OH.
- the polymerisation proceeds by the coupling of the monomers via elimination of a reactive halide group and a boronate anionic group (—B(X) 3 ⁇ ) .
- the conversion of the boron-derivative functional groups to the boronate anionic groups (—B(X) 3 ⁇ ) by the organic base to form a salt having an organic cation is carried out under non-polymerisation conditions prior to polymerisation.
- the boronate anionic group is preferably a —B(OH) 3 ⁇ group.
- the reaction may also proceed, for example, via a —B(OH) 2 F ⁇ anionic group using, for example, a tetraalkylammonium fluoride as the organic base.
- conjugated polymer refers to either a fully conjugated polymer i.e. a polymer which is conjugated along the full length of its chain, or a partially conjugated polymer i.e. a polymer which contains conjugated segments together with non-conjugated segments.
- aromatic monomer refers to any monomer which has the respective functional groups directly substituted on one or more aromatic rings. In the case of monomers having more than one aromatic ring, the functional groups can be substituted on either the same or different aromatic rings.
- suitable types of monomers include, but are not limited to, arylenes, heterocylic aromatic monomers, and fused aromatic systems such as biphenylenes, naphthalenes and fluorenes.
- Each monomer preferably comprises an arylene, a heteroarylene, a triarylamine, or a bisarylene vinylene.
- Each aromatic group within the monomer may be substituted or unsubstituted.
- Particularly preferred types of monomers include dialkylphenylenes, dialkoxy phenylenes, substituted and non-substituted thiophenes and benzothiadiazoles, and dialkylfluorenes such as 9,9-di-n-octylfluorenes.
- One or more of the monomers could also be a pre-formed oligomeric or polymeric chain comprising several smaller units with the necessary functional groups provided at the desired positions on the chain.
- this invention could also be extended to the use of monomers in which some or all of the functional groups are not directly substituted on an aromatic ring, in particular to other kinds of unsaturated monomers.
- Monomers particularly useful in the present invention include those which may be polymerised to form a semiconductive conjugated polymer such as a semiconductive conjugated polymer for use in an optical device such as an electroluminescent device. Such polymers may be used in an emissive layer or as a hole transport or electron transport polymer. Luminescent polymers are particularly useful in such devices.
- the conjugated polymer may be fully or partially conjugated, perhaps containing conjugated segments and way be a homopolymer, a copolymer or an oligomer, and may be a linear or a branched chain polymer such as a dendrimer.
- the monomers must each have the appropriate functional groups for the Suzuki reaction.
- a first reactive dihalide monomer is polymerised with a second monomer having two boron derivative functional groups.
- the first and the second monomers may be the same or different. Where the monomers are the same, a homopolymer is produced. Where the monomers are different, a copolymer is produced.
- a monomer having a boron derivative functional group and a reactive halide functional group is polymerised to form a homopolymer. It is also possible to form copolymers from this second arrangement simply by polymerising together two or more different types of monomers each containing both functionalities.
- the reactive halide functional group on the reactive dihalide monomer or the monomer having the reactive halide functional group is Br or I although it is possible to use instead groups such as chlorine, triflate (CF 3 SO 3 ⁇ ), tosylate and mesylate.
- the boronic acid group is represented by —B(OH) 2 ;
- the boronic ester group is preferably —B(OR 1 ) (OR 2 ) or —B(OR 5 O) and the borane group is preferably —BR 3 R 4 , wherein R 1 is a substituted or non-substituted C 1 -C 6 alkyl group and R 2 is H or a substituted or non-substituted C 1 -C 6 alkyl group;
- R 3 and R 4 are each independently substituted or non-substituted C 1 -C 6 alkyl groups, and R 5 is a substituted or non-substituted divalent hydrocarbon radical resulting in a 5 or 6 membered ester ring.
- suitable groups as R 5 include substituted or non-substituted C 2 or C 3 alkylene groups, or substituted or non-substituted ortho- or meta-phenylene groups
- Suitable boronic ester groups include, for example, the products of esterification of the corresponding boronic acid group with monovalent C 1 -C 6 alcohols, ethane diols such as pinacol, propane diols or ortho aromatic diols such as 1,2-dihydroxybenzene.
- organic base includes sources of hydroxyl ions and Lewis bases such as those which create a source of hydroxyl ions in combination with water.
- the organic base should be soluble in an organic solvent and/or an aqueous solvent. It is preferable to deliver the organic base in the form of an aqueous solution thereof, as this is effective at hydrolysing boronic ester or borane groups to the corresponding boronic acid groups and then converting the boronic acid groups to boronate anionic groups.
- a single organic base or a mixture of different organic bases nay be used.
- organic bases include alkyl ammonium hydroxides, alkyl ammonium carbonates, alkyl ammonium biscarbonates, alkylammonium borates, 1,5-diazabicyclo[4.3.0]non-5-ene (DBN), 1,6-diazabicyclo[5.4.0]undec-7-ene (DBU) , 1,4-diazabicyclo[2.2.2]octane (DABCO), dimethylaminopyridine (DMAP), pyridine, trialkylamines and alkylammonium fluorides such as tetraalkylammonium fluorides.
- DBN 1,5-diazabicyclo[4.3.0]non-5-ene
- DBU 1,6-diazabicyclo[5.4.0]undec-7-ene
- DBU 1,4-diazabicyclo[2.2.2]octane
- DMAP dimethylaminopyridine
- pyridine trialkylamines
- the organic base used in the method of the present invention is preferably a tetraalkyl ammonium hydroxide such as tetramethyl ammonium hydroxide, tetraethyl ammonium hydroxide or tetra-n-propyl ammonium hydroxide.
- a tetraalkyl ammonium carbonate or a tetraalkyl ammonium bicarbonate is used as the organic base.
- Other preferred bases are tetraalkylammonium borates, particularly, tetraethylammonium borate. These bases are particularly useful for reducing monomer degradation.
- organic base for any given system will depend on the nature of the monomers and solvent system employed.
- a base selected from the group of tetramethyl ammonium hydroxide, tetraethyl ammonium hydroxide or tetraisopropyl ammonium hydroxide is particularly preferred, with tetraethyl ammonium hydroxide being the most preferred of these organic bases.
- the quantity of the base will depend on various factors such as the type of particular base used and the type of boron derivative functional group used. However, it has to be present in a sufficient quantity to convert the boron derivative functional group into the corresponding —B(X) 3 ⁇ anionic group, which is the reactive species which is eliminated with the reactive halide functional group to effect polymerisation.
- the organic base should preferably be used in the form of an aqueous solution to provide sufficient water to hydrolyze the boronic ester or borane groups to the corresponding boronic acid groups and convert the boronic acid groups into boronate anionic groups.
- organic base per boron-derivative functional group has been found to give fair degrees of polymerisation over a relatively long period of time.
- at least 1.5 molar equivalents, further preferably at least 2 molar equivalents, of the organic base per boron-derivative functional group are used.
- molecular weights over 200,000 have been obtained in a relatively short period of time using 2.26 mole equivalents of organic base per boron-derivative functional group.
- the number of equivalents is defined by the functionality of the base multiplied by the molar ratio of base to boron-derivative functional groups.
- the reaction mixture includes a solvent in which the conjugated polymer is soluble.
- a solvent in which the conjugated polymer is soluble for example, in the case of polyfluorenes, non-polar aromatic solvents such as anisole, benzene, ethylbenzene, mesitylene, xylene, and particularly toluene are preferred.
- the reaction mixture includes a solvent in which the organic cation boronate salt produced by the reaction of the organic base with the boron-derivative functional groups, is soluble.
- the reaction mixture should include sufficient water to hydrolyze the boronic ester or borane group to the corresponding boronic acid group.
- the organic base such as a tetralkylammonium hydroxide or tetraalkyl ammonium carbonate or bicarbonate is preferably added to the reaction mixture in the form of an aqueous solution to thereby provide sufficient water to hydrolyze the boronic ester or borane groups to the corresponding boronic acid groups.
- the alkyl ammonium hydroxide may alternatively be added in the form of a hydrated salt thereof such as the trihydrate.
- the reaction mixture further comprises an aqueous solution of an inorganic base, preferably an inorganic base which does not include alkali metal ions, such as NH 4 OH. This is preferred from the point of view of producing polymers of particularly high molecular weight.
- the catalyst used in the method of the present invention is preferably a palladium catalyst.
- the palladium catalyst may be a Pd(0) complex or a Pd(II) salt.
- the Pd(0) complex is preferred, a Pd(Ph 3 P) 4 catalyst being particularly preferred.
- the amount of palladium catalyst in the reaction mixture is 0.01 to 1 mol. %, preferably about 0.15 mol. %, based on the total number of moles of monomers used.
- the inventors of the present invention have unexpectedly found that by conducting the reaction using an organic base rather an inorganic base as in U.S. Pat. No. 5,777,070, the polymerization can be carried out with faster reaction times and with better reproducibility. They have also found that the use of an organic base eliminates the problem of foaming and the problem of side-products becoming strongly complexed to the walls of the reaction vessel, whereby the need to utilize specialized reaction vessels is eliminated. In addition, the fact that alkali carbonates or alkali bicarbonates are not required for the reaction also has the additional advantage that it eliminates the need for a final purification step to remove alkali metal contaminants, which would otherwise be required to avoid such contaminants detrimentally affecting the performance of the polymer material in many applications.
- polymers prepared by this route have lower residual levels of palladium compared to polymers prepared by prior art processes. This is particularly important in the case that the polymer is to be used in a light-emitting device, since the presence of palladium is believed to have a detrimental effect on the optical performance of the device.
- the molecular weights grow gradually with time in these very controlled polymerizations. This has the advantage that repeatable (consistent) and desired molecular weights can be achieved by stopping the reaction at the appropriate stage.
- tine present invention provides a process for the production of an optical device or a component for an optical device.
- the process comprises providing a substrate and producing a polymer in accordance with the process as described above, whereby the polymer is supported by the substrate.
- the polymer may be supported by the substrate directly, for example where a polymer film is deposited or formed on the substrate, typically a transparent substrate.
- the polymer may be supported by the substrate indirectly where one or more intervening layers between the substrate and the polymer are provided.
- the optical device may comprise a luminescent device such as an electroluminescent device in which the polymer is disposed between a cathode and an anode. Where the polymer is an emissive layer, a hole transport layer may be provided between the anode and the substrate and an electron transport layer may be provided between the polymer and the cathode.
- FIG. 1 shows a reaction scheme in accordance with the invention
- FIG. 2 shows a schematic representation of an optical device according to the invention
- FIG. 3 shows another reaction scheme in accordance with the present invention.
- FIG. 4 shows examples of the boronate anions by which the polymerisation proceeds.
- FIG. 1 illustrates one possible route for providing poly 2,7(9,9-di-n-octylfluorene) (F8 comprising a chain of di-n-octylfluorene repeating units.
- a 2,7(9,9-di-n-octylfluorene) diboronate (I) is reacted with a corresponding 2,7-dibromo-(9,9-di-n-octylfluorene) (IT) in toluene in the presence of a palladium catalyst such as Pd(PPh 3 ) 4 and an organic base such as a tetraalkyl ammonium hydroxide, tetraalkyl ammonium carbonate or tetraalkyl ammonium bicarbonate to produce polymer F8.
- a palladium catalyst such as Pd(PPh 3 ) 4
- an organic base such as a tetraalkyl ammonium hydroxide, tetraalkyl ammonium carbonate or tetraalkyl ammonium bicarbonate
- this polymer can be produced by, for example, the homopolymerization of 2-bromo-(9,9-di-n-octylfluorene)-7-ethylenylboronate in toluene in the presence of a palladium catalyst and an organic base.
- Polymer F8 was produced according to the following method.
- a three-necked 500 ml round bottomed flask fitted with P glass stirring rod attached to an electrical mechanical stirrer, a Teflon stirring blade, and a reflux condensor (connected to a nitrogen line) was charged with 9,9dioctylfluorene-2,7-di(ethylenylboronate) (4.773 g, 9.0 mmol), 2,7-dibromo-9,9′-dioctylfluorene (4,936 g, 9.0 mmol), tetrakis-(triphenylphosphine)palladium (31.2 mg, 0.027 mmol) and toluene (90 ml).
- the solution was stirred under nitrogen at room temperature for approximately ten minutes.
- An aqueous solution of tetraethyl ammonium hydroxide (30 ml, 20% wt/vol.) was added to
- the polymer obtained by this method had a peak molecular weight of 204,000. This and other molecular weights given below were measured using the Polymer Labs GPC system incorporating an LC1120 isocratic pump and ERC-7515A Refractive Index Detector. The solvent used was THF at a flow rate of 1 ml/min, and the temperature was controlled at 35° C. The column type was PL mixed (*2, 30 cm) calibrated using PL 600-500000 polystyrene standards.
- Polymer F8 was produced in exactly the same way as in Example 1 except that the aqueous solution of tetraethyl ammonium hydroxide was added dropwise.
- the polymer obtained had a peak molecular weight of 229,000.
- Polymer F8 was produced in exactly the same way as in Example 1 except that the reaction was carried out at half-scale in a 250 ml flask.
- the polymer obtained had a peak molecular weight of 222,000.
- Polymer F8 was produced in exactly the same way as in Example 1 except that an aqueous solution of ammonium hydroxide (10.45 ml ammonium hydroxide made up to 20 ml with water) was further added to the monomer and toluene mixture prior to stirring under nitrogen at room temperature for ten minutes. No reaction was observed until the aqueous solution of tetraethyl ammonium hydroxide was added.
- the polymer obtained had a peak molecular weight of 373,650.
- Polymer F8 was produced in exactly the same manner as in Example 1 except that an aqueous solution of an identical molar quantity of tetramethyl ammonium hydroxide was used instead of the aqueous solution of tetraethyl ammonium hydroxide.
- the polymer obtained had a peak molecular weight of 150,500.
- Polymer F8 was produced in exactly the same way as in Example 1 except that an aqueous solution of an identical molar quantity of tetrapropyl ammonium hydroxide was used instead of the aqueous solution of tetraethyl ammonium hydroxide.
- the polymer obtained had a peak molecular weight of 142,000.
- a 500 ml reaction vessel was charged with 9,9-dioctylfluorene-2,7-diethylenyl (4.773 g, 9.0 mmol.), 2-7-dibromobenzothiadiazole (2.6449 g 9.0 mmol, tetrakistriphenylphosphine palladium 31.2 mg, and toluene 100 ml.
- the mixture was stirred at room temperature for 10 minutes under nitrogen.
- Bis(tetraethylammonium)carbonate (13.0 g) dissolved in 20 ml of de-ionised water was then added to the mixture, which was then allowed to stir at room temperature under flow of nitrogen for 20 minutes.
- reaction mixture was heated to and maintained at reflux under nitrogen for up to 18 hours (typically left overnight). During this time the reaction mixture was stirred (setting rate 2-3) under an atmosphere of nitrogen.
- the mixture was allowed to cool to room temperature and poured into 4 l of methanol to precipitate the polymer.
- the polymer/methanol mixture was then filtered and the polymer was allowed to air dry on the Buchner funnel for five minutes. Aluminium foil was used to cover the top of the Buchner funnel to minimise light exposure.
- a further synthesis was carried out in accordance with the synthesis described in Example 7 except that, in this particular case a mixed solvent system was used (THF/toluene) ( ⁇ 50:50). The molecular weight obtained was ⁇ 350,000 (Mp).
- reaction 3 is formed and dissolves in the THF with the other components to give a clear single liquid phase.
- the reaction is heated to the reflux temperature of THF (66° C.) during which time the solution viscosity increases as polymer molecular weight increases.
- the reaction is usually complete within two hours.
- 9,9-di-n-octylfluorene-2,7-di(ethyleneboronate), 2,7-dibromo-9,9-di-n-octylfluorene and a palladium catalyst such as tetrakis(triphenylphosphine)palladium are dissolved in a mixture of toluene and THF (e.g. 1:1 mixture).
- a palladium catalyst such as tetrakis(triphenylphosphine)palladium
- a tetraalkyl ammonium disalt of the kind shown as (1) in FIG. 4 is formed as a white solid precipitate suspended in a single liquid phase
- the reaction is heated to the reflux temperature of THF (66° C.) during which time the solution viscosity increases as polymer molecular weight increases.
- THF reflux temperature
- this polymerisation can also be carried out in mixtures of water-miscible organic solvents such as THF and non water-miscible non-polar solvents such as toluene.
- water-miscible organic solvents such as THF
- non water-miscible non-polar solvents such as toluene.
- the disalt tends to precipitate upon its in-situ formation to give a two phase system.
- the use of such a solvent mixture can be advantageous as some polymers are more compatible with a polar solvent such as THF whereas others are more soluble in non-polar solvents like toluene.
- the ability to use such solvent mixtures means that far more polymer types can be prepared without a risk of premature polymer precipitation during polymerisation.
- reaction 4 is formed and dissolves in the THF with the other components to give a clear single liquid phase. All the components required for the polymerisation are present in the single liquid phase.
- the reaction is heated to the reflux temperature of THF (66° C.) during which time the solution viscosity increases as polymer molecular weight increases. After a certain amount of time (e.g. 1 hour) a proportion of a second organic solvent (e.g. toluene) is added and the reaction is continued at the same temperature until further molecular weight increase is not observed (usually a total reaction time of two hours).
- a second organic solvent e.g. toluene
- the mixture was allowed to cool to room temperature and poured into 4 L of methanol to precipitate the polymer.
- the polymer/methanol mixture was then filtered and the polymer was allowed to air dry on the Buchner funnel for five minutes. Aluminium foil was used to cover the top of the Buchner funnel to minimise light exposure.
- Polymer F8 was produced twice according to the above.
- the polymers obtained had a molecular weight of 170000 and 230000, respectively, showing relatively poor reproducibility.
- FIG. 2 shows in a purely schematic way the order of layers in an electroluminescent device generally designated 1 .
- substrate 2 which is typically a transparent substrate such as glass
- anode 3 which may be a layer of transparent indium tin oxide.
- hole transporting layer 3 which may be a polyethylene dioxythiophene, on which is disposed emissive layer 4 , which may be a polymer according to the present invention.
- Layer 5 is an organic electron transport layer.
- Layer 6 is a cathode which may be a lithium aluminium layer.
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Abstract
Description
- The present invention relates to a process for preparing a polymer such as a conjugated polymer for use in an optical device such as an electroluminescent device.
- Organic electroluminescent devices are known which employ an organic material for light emission. For example, WO90/13148 describes such a device comprising a semiconductor layer comprising a polymer film which comprises at least one conjugated polymer situated between electrodes. The polymer film in this case comprises a poly(para-phenylene vinylene) (PPV) film which is capable of light emission when electrons and holes are injected therein. Other polymer layers capable of transporting holes or transporting electrons to the emissive layer may be incorporated into such devices. The bandgap of PPV and other poly(arylene vinylene) polymers may be tuned to modulate the wavelength, quantum efficiency and/or refractive index thereof, as described in EP-A-0544795.
- Preparation of poly(arylene vinylene)s for use in optical devices has been conveniently carried out by a precursor route where thermal elimination of leaving groups gives rise to a conjugated polymer, or by other routes such as a dehydrohalogenation reaction. However, poly(arylene vinylene)s are not the only class of polymers which are suitable for use in optical devices. Other aryl-containing polymers may be useful and one route generally useful in the production of conjugated polymers is the Suzuki reaction (Synthetic Communications 11(7), 513, 1981). This reaction involves the use of a palladium-based catalyst, an aqueous alkaline carbonate or bicarbonate inorganic base and a solvent for the reactants and possibly the polymer product. The monomer reactants are typically a diboronic acid or diboronate monomer and a dibromo monomer.
- U.S. Pat. No. 5,777,070 is directed to attempts to improve the Suzuki reaction to form conjugated polymers from aromatic monomers. U.S. Pat. No. 5,777,070 indicates that such reactions require as a solvent a non-polar solvent such as toluene. However, such non-polar solvents are acknowledged to slow down the rate of reaction. In order to overcome this disadvantage, U.S. Pat. No. 5,777,040 proposes the use of a phase-transfer catalyst such as tricaprylmethyl ammonium chloride sold under the registered trade mark Aliquat to increase the rate of reaction. Accordingly, the reaction mixture contains an organic solvent such as toluene, an aqueous solution of an inorganic base such as sodium bicarbonate, a catalytic amount of a palladium complex and a catalytic amount of the phase transfer catalyst.
- The inventors of the present invention have identified a number of drawbacks with the process described in U.S. Pat. No. 5,777,070. Firstly, the reaction is very slow; reaction times are typically of the order of la hours in order to produce a polymer having a molecular weight of the desired order. Discolouration, of the polymer product and decomposition of the catalyst become concerns with such long reaction times. Secondly, the reproducibility of the reaction is somewhat poor. The monomer ratio is generally used in the case of copolymerization to control the molecular weight of the product polymer. However, the present inventors have noticed that the peak molecular weight of polymers produced according to the method disclosed in U.S. Pat. No. 5,777,070 vary considerably from reaction to reaction even when the starting monomer ratio is the same. Experiments conducted by the inventors of the present invention have shown that the peak molecular weight of the product polymer can vary by as much as about 100,000 for the same starting monomer ratio. Thirdly, the inventors of the present invention have also noticed that significant foaming is observed and that side products are produced which complex strongly to the walls of the reaction vessel, when a glass reaction vessel is used. These are difficult to remove, and the reaction thus requires the use of specialized reaction vessels. The above problems also make this a very difficult and expensive process to scale up.
- The present invention aims to overcome at least some of the drawbacks mentioned above.
- According to a first aspect of the present invention, there is provided a process for preparing a conjugated polymer, which comprises polymerizing in a reaction mixture (a) an aromatic monomer having at least two boron derivative functional groups selected from a boronic acid group, a boronic ester group and a borane group, and an aromatic monomer having at least two reactive halide functional groups; or (b) an aromatic monomer having one reactive halide functional group and one boron derivative functional croup selected from a boronic acid group, a boronic ester group and a borane group, wherein the reaction mixture comprises a catalytic amount of a catalyst suitable for catalysing the polymerisation of the aromatic monomers, and an organic base in an amount sufficient to convert the boron derivative functional groups into —B(X)3 − anionic groups, wherein X is independently selected from the group consisting of F and OH.
- The polymerisation proceeds by the coupling of the monomers via elimination of a reactive halide group and a boronate anionic group (—B(X)3 −) .
- According to one embodiment of the invention, the conversion of the boron-derivative functional groups to the boronate anionic groups (—B(X)3 −) by the organic base to form a salt having an organic cation is carried out under non-polymerisation conditions prior to polymerisation.
- The boronate anionic group has the formula —B(OH)nFm −, wherein n+m=3 and n and m are each 0, 1, 2 or 3. The boronate anionic group is preferably a —B(OH)3 − group. However, the reaction may also proceed, for example, via a —B(OH)2F− anionic group using, for example, a tetraalkylammonium fluoride as the organic base.
- The term conjugated polymer refers to either a fully conjugated polymer i.e. a polymer which is conjugated along the full length of its chain, or a partially conjugated polymer i.e. a polymer which contains conjugated segments together with non-conjugated segments.
- The term aromatic monomer refers to any monomer which has the respective functional groups directly substituted on one or more aromatic rings. In the case of monomers having more than one aromatic ring, the functional groups can be substituted on either the same or different aromatic rings. Examples of suitable types of monomers include, but are not limited to, arylenes, heterocylic aromatic monomers, and fused aromatic systems such as biphenylenes, naphthalenes and fluorenes. Each monomer preferably comprises an arylene, a heteroarylene, a triarylamine, or a bisarylene vinylene. Each aromatic group within the monomer may be substituted or unsubstituted. Particularly preferred types of monomers include dialkylphenylenes, dialkoxy phenylenes, substituted and non-substituted thiophenes and benzothiadiazoles, and dialkylfluorenes such as 9,9-di-n-octylfluorenes. One or more of the monomers could also be a pre-formed oligomeric or polymeric chain comprising several smaller units with the necessary functional groups provided at the desired positions on the chain.
- It is also envisaged that under the appropriate reaction conditions, this invention could also be extended to the use of monomers in which some or all of the functional groups are not directly substituted on an aromatic ring, in particular to other kinds of unsaturated monomers.
- Monomers particularly useful in the present invention include those which may be polymerised to form a semiconductive conjugated polymer such as a semiconductive conjugated polymer for use in an optical device such as an electroluminescent device. Such polymers may be used in an emissive layer or as a hole transport or electron transport polymer. Luminescent polymers are particularly useful in such devices. The conjugated polymer may be fully or partially conjugated, perhaps containing conjugated segments and way be a homopolymer, a copolymer or an oligomer, and may be a linear or a branched chain polymer such as a dendrimer.
- As described above, the monomers must each have the appropriate functional groups for the Suzuki reaction. In one arrangement, a first reactive dihalide monomer is polymerised with a second monomer having two boron derivative functional groups. In this arrangement the first and the second monomers may be the same or different. Where the monomers are the same, a homopolymer is produced. Where the monomers are different, a copolymer is produced. In a second arrangement, a monomer having a boron derivative functional group and a reactive halide functional group is polymerised to form a homopolymer. It is also possible to form copolymers from this second arrangement simply by polymerising together two or more different types of monomers each containing both functionalities.
- Preferably, the reactive halide functional group on the reactive dihalide monomer or the monomer having the reactive halide functional group is Br or I although it is possible to use instead groups such as chlorine, triflate (CF3SO3−), tosylate and mesylate.
- With respect to the boron-derivative functional groups, the boronic acid group is represented by —B(OH)2; the boronic ester group is preferably —B(OR1) (OR2) or —B(OR5O) and the borane group is preferably —BR3R4, wherein R1 is a substituted or non-substituted C1-C6 alkyl group and R2 is H or a substituted or non-substituted C1-C6 alkyl group; R3 and R4 are each independently substituted or non-substituted C1-C6 alkyl groups, and R5 is a substituted or non-substituted divalent hydrocarbon radical resulting in a 5 or 6 membered ester ring. Examples of suitable groups as R5 include substituted or non-substituted C2 or C3 alkylene groups, or substituted or non-substituted ortho- or meta-phenylene groups.
- Suitable boronic ester groups include, for example, the products of esterification of the corresponding boronic acid group with monovalent C1-C6 alcohols, ethane diols such as pinacol, propane diols or ortho aromatic diols such as 1,2-dihydroxybenzene.
- The term “organic base” includes sources of hydroxyl ions and Lewis bases such as those which create a source of hydroxyl ions in combination with water. The organic base should be soluble in an organic solvent and/or an aqueous solvent. It is preferable to deliver the organic base in the form of an aqueous solution thereof, as this is effective at hydrolysing boronic ester or borane groups to the corresponding boronic acid groups and then converting the boronic acid groups to boronate anionic groups.
- A single organic base or a mixture of different organic bases nay be used.
- Examples of organic bases include alkyl ammonium hydroxides, alkyl ammonium carbonates, alkyl ammonium biscarbonates, alkylammonium borates, 1,5-diazabicyclo[4.3.0]non-5-ene (DBN), 1,6-diazabicyclo[5.4.0]undec-7-ene (DBU) , 1,4-diazabicyclo[2.2.2]octane (DABCO), dimethylaminopyridine (DMAP), pyridine, trialkylamines and alkylammonium fluorides such as tetraalkylammonium fluorides.
- The organic base used in the method of the present invention is preferably a tetraalkyl ammonium hydroxide such as tetramethyl ammonium hydroxide, tetraethyl ammonium hydroxide or tetra-n-propyl ammonium hydroxide.
- In another preferred embodiment of the present invention, a tetraalkyl ammonium carbonate or a tetraalkyl ammonium bicarbonate is used as the organic base. Other preferred bases are tetraalkylammonium borates, particularly, tetraethylammonium borate. These bases are particularly useful for reducing monomer degradation.
- The most suitable organic base for any given system will depend on the nature of the monomers and solvent system employed. For example, in the case of the preparation of polyfluorenes from the boronic ester using toluene as a solvent, a base selected from the group of tetramethyl ammonium hydroxide, tetraethyl ammonium hydroxide or tetraisopropyl ammonium hydroxide is particularly preferred, with tetraethyl ammonium hydroxide being the most preferred of these organic bases.
- The quantity of the base will depend on various factors such as the type of particular base used and the type of boron derivative functional group used. However, it has to be present in a sufficient quantity to convert the boron derivative functional group into the corresponding —B(X)3 − anionic group, which is the reactive species which is eliminated with the reactive halide functional group to effect polymerisation. In the case that the boron-derivative group is a boronic ester or a borane, the organic base should preferably be used in the form of an aqueous solution to provide sufficient water to hydrolyze the boronic ester or borane groups to the corresponding boronic acid groups and convert the boronic acid groups into boronate anionic groups.
- The use of one equivalent of organic base per boron-derivative functional group has been found to give fair degrees of polymerisation over a relatively long period of time. Preferably, at least 1.5 molar equivalents, further preferably at least 2 molar equivalents, of the organic base per boron-derivative functional group are used. For example, molecular weights over 200,000 have been obtained in a relatively short period of time using 2.26 mole equivalents of organic base per boron-derivative functional group.
- The number of equivalents is defined by the functionality of the base multiplied by the molar ratio of base to boron-derivative functional groups.
- It is preferable that the reaction mixture includes a solvent in which the conjugated polymer is soluble. For example, in the case of polyfluorenes, non-polar aromatic solvents such as anisole, benzene, ethylbenzene, mesitylene, xylene, and particularly toluene are preferred. It is also preferable that the reaction mixture includes a solvent in which the organic cation boronate salt produced by the reaction of the organic base with the boron-derivative functional groups, is soluble.
- In the case that the boron-derivative functional group is a boronic ester or borane group, the reaction mixture should include sufficient water to hydrolyze the boronic ester or borane group to the corresponding boronic acid group. The organic base, such as a tetralkylammonium hydroxide or tetraalkyl ammonium carbonate or bicarbonate is preferably added to the reaction mixture in the form of an aqueous solution to thereby provide sufficient water to hydrolyze the boronic ester or borane groups to the corresponding boronic acid groups. According to one possible variation, it is envisaged that the alkyl ammonium hydroxide may alternatively be added in the form of a hydrated salt thereof such as the trihydrate.
- It is preferable to carry out the polymerisation in a single liquid phase by using an organic solvent or solvent mixture in which all the reaction components, i.e. the boronate salt produced by the reaction of the organic base with the boron-derivative functional groups and the dihalide monomers where applicable, are soluble, and with which water present for hydrolysis of boronic ester groups or borane groups is miscible.
- In one embodiment, the reaction mixture further comprises an aqueous solution of an inorganic base, preferably an inorganic base which does not include alkali metal ions, such as NH4OH. This is preferred from the point of view of producing polymers of particularly high molecular weight.
- The catalyst used in the method of the present invention is preferably a palladium catalyst. The palladium catalyst may be a Pd(0) complex or a Pd(II) salt. The Pd(0) complex is preferred, a Pd(Ph3P)4 catalyst being particularly preferred. Typically, the amount of palladium catalyst in the reaction mixture is 0.01 to 1 mol. %, preferably about 0.15 mol. %, based on the total number of moles of monomers used.
- The inventors of the present invention have unexpectedly found that by conducting the reaction using an organic base rather an inorganic base as in U.S. Pat. No. 5,777,070, the polymerization can be carried out with faster reaction times and with better reproducibility. They have also found that the use of an organic base eliminates the problem of foaming and the problem of side-products becoming strongly complexed to the walls of the reaction vessel, whereby the need to utilize specialized reaction vessels is eliminated. In addition, the fact that alkali carbonates or alkali bicarbonates are not required for the reaction also has the additional advantage that it eliminates the need for a final purification step to remove alkali metal contaminants, which would otherwise be required to avoid such contaminants detrimentally affecting the performance of the polymer material in many applications. Furthermore, the present inventors have found surprisingly that polymers prepared by this route have lower residual levels of palladium compared to polymers prepared by prior art processes. This is particularly important in the case that the polymer is to be used in a light-emitting device, since the presence of palladium is believed to have a detrimental effect on the optical performance of the device.
- Furthermore, in the process of the present invention, the molecular weights grow gradually with time in these very controlled polymerizations. This has the advantage that repeatable (consistent) and desired molecular weights can be achieved by stopping the reaction at the appropriate stage.
- In a fourth aspect, tine present invention provides a process for the production of an optical device or a component for an optical device. The process comprises providing a substrate and producing a polymer in accordance with the process as described above, whereby the polymer is supported by the substrate. The polymer may be supported by the substrate directly, for example where a polymer film is deposited or formed on the substrate, typically a transparent substrate. Alternatively, the polymer may be supported by the substrate indirectly where one or more intervening layers between the substrate and the polymer are provided. The optical device may comprise a luminescent device such as an electroluminescent device in which the polymer is disposed between a cathode and an anode. Where the polymer is an emissive layer, a hole transport layer may be provided between the anode and the substrate and an electron transport layer may be provided between the polymer and the cathode.
- The present invention will now be described in further detail, by way of example only, with reference to the accompanying drawings, in which:
- FIG. 1 shows a reaction scheme in accordance with the invention;
- FIG. 2 shows a schematic representation of an optical device according to the invention;
- FIG. 3 shows another reaction scheme in accordance with the present invention; and
- FIG. 4 shows examples of the boronate anions by which the polymerisation proceeds.
- FIG. 1 illustrates one possible route for providing
poly 2,7(9,9-di-n-octylfluorene) (F8 comprising a chain of di-n-octylfluorene repeating units. A 2,7(9,9-di-n-octylfluorene) diboronate (I) is reacted with a corresponding 2,7-dibromo-(9,9-di-n-octylfluorene) (IT) in toluene in the presence of a palladium catalyst such as Pd(PPh3)4 and an organic base such as a tetraalkyl ammonium hydroxide, tetraalkyl ammonium carbonate or tetraalkyl ammonium bicarbonate to produce polymer F8. - In an alternative embodiment of the present invention, this polymer can be produced by, for example, the homopolymerization of 2-bromo-(9,9-di-n-octylfluorene)-7-ethylenylboronate in toluene in the presence of a palladium catalyst and an organic base.
- Polymer F8 was produced according to the following method. A three-necked 500 ml round bottomed flask fitted with P glass stirring rod attached to an electrical mechanical stirrer, a Teflon stirring blade, and a reflux condensor (connected to a nitrogen line) was charged with 9,9dioctylfluorene-2,7-di(ethylenylboronate) (4.773 g, 9.0 mmol), 2,7-dibromo-9,9′-dioctylfluorene (4,936 g, 9.0 mmol), tetrakis-(triphenylphosphine)palladium (31.2 mg, 0.027 mmol) and toluene (90 ml). The solution was stirred under nitrogen at room temperature for approximately ten minutes. An aqueous solution of tetraethyl ammonium hydroxide (30 ml, 20% wt/vol.) was added to the stirring mixture at room temperature.
- The stirring mixture was heated to and maintained at reflux (115° C. oil bath temperature) for approximately two hours. Bromobenzene (1-2 ml) was added to the mixture, which was allowed to stir at reflux for a further hour before adding phenyl boronic acid (1.5-2.0 g), after which the mixture was allowed to stir at reflux for one hour.
- The mixture was allowed to cool to room temperature and poured slowly into 4 litres of methanol to precipitate the polymer. The polymer/methanol mixture was then filtered. The polymer isolated by filtration was then further reprecipitated into methanol from toluene solution.
- The polymer obtained by this method had a peak molecular weight of 204,000. This and other molecular weights given below were measured using the Polymer Labs GPC system incorporating an LC1120 isocratic pump and ERC-7515A Refractive Index Detector. The solvent used was THF at a flow rate of 1 ml/min, and the temperature was controlled at 35° C. The column type was PL mixed (*2, 30 cm) calibrated using PL 600-500000 polystyrene standards.
- Polymer F8 was produced in exactly the same way as in Example 1 except that the aqueous solution of tetraethyl ammonium hydroxide was added dropwise. The polymer obtained had a peak molecular weight of 229,000.
- Polymer F8 was produced in exactly the same way as in Example 1 except that the reaction was carried out at half-scale in a 250 ml flask. The polymer obtained had a peak molecular weight of 222,000.
- Polymer F8 was produced in exactly the same way as in Example 1 except that an aqueous solution of ammonium hydroxide (10.45 ml ammonium hydroxide made up to 20 ml with water) was further added to the monomer and toluene mixture prior to stirring under nitrogen at room temperature for ten minutes. No reaction was observed until the aqueous solution of tetraethyl ammonium hydroxide was added. The polymer obtained had a peak molecular weight of 373,650.
- Polymer F8 was produced in exactly the same manner as in Example 1 except that an aqueous solution of an identical molar quantity of tetramethyl ammonium hydroxide was used instead of the aqueous solution of tetraethyl ammonium hydroxide. The polymer obtained had a peak molecular weight of 150,500.
- Polymer F8 was produced in exactly the same way as in Example 1 except that an aqueous solution of an identical molar quantity of tetrapropyl ammonium hydroxide was used instead of the aqueous solution of tetraethyl ammonium hydroxide. The polymer obtained had a peak molecular weight of 142,000.
- The reaction scheme for the synthesis of F8ET polymer using Bis(tetraethylammonium)carbonate as base is shown in FIG. 3.
- A 500 ml reaction vessel was charged with 9,9-dioctylfluorene-2,7-diethylenyl (4.773 g, 9.0 mmol.), 2-7-dibromobenzothiadiazole (2.6449 g 9.0 mmol, tetrakistriphenylphosphine palladium 31.2 mg, and toluene 100 ml. The mixture was stirred at room temperature for 10 minutes under nitrogen. Bis(tetraethylammonium)carbonate (13.0 g) dissolved in 20 ml of de-ionised water was then added to the mixture, which was then allowed to stir at room temperature under flow of nitrogen for 20 minutes.
- The reaction mixture was heated to and maintained at reflux under nitrogen for up to 18 hours (typically left overnight). During this time the reaction mixture was stirred (setting rate 2-3) under an atmosphere of nitrogen.
- Bromobenzene (1 ml) was then added and the reaction mixture allowed to stir at reflux for 2 hours, after which phenyl boronic acid was added (2 g) and the reaction mixture was allowed to stir at reflux for a further 2 hours.
- The mixture was allowed to cool to room temperature and poured into 4 l of methanol to precipitate the polymer. The polymer/methanol mixture was then filtered and the polymer was allowed to air dry on the Buchner funnel for five minutes. Aluminium foil was used to cover the top of the Buchner funnel to minimise light exposure.
- After purification, the final yield was ˜3.05 g, 64%. The peak molecular weigh: was found to be 175,000 (Mp) as determined by GPC.
- A further synthesis was carried out in accordance with the synthesis described in Example 7 except that, in this particular case a mixed solvent system was used (THF/toluene) (−50:50). The molecular weight obtained was −350,000 (Mp).
- 9,9-di-n-octylfluorene-2,7-di(ethyleneboronate), 2,7-dibromo-9,9-di-n-octylfluorene and a palladium catalyst such as tetrakis (triphenylphosphine)palladium are dissolved in tetrahydrofuran (THF). To this is added two equivalents of a tetraalkylammonium hydroxide as an aqueous solution of concentration at least 20% by weight. The mixture is stirred at room temperature under a flow of nitrogen for 20 min. During this time, the tetralkylammonium disalt shown as (1) in FIG. 3 is formed and dissolves in the THF with the other components to give a clear single liquid phase. The reaction is heated to the reflux temperature of THF (66° C.) during which time the solution viscosity increases as polymer molecular weight increases. The reaction is usually complete within two hours.
- As demonstrated above, particularly good results have been achieved in this polymerisation by using a polar organic solvent in which the boronate salt and the dihalide monomers are soluble and which is miscible with water (tetrahydrofuran) to provide a single phase reaction mixture. The polymerisation can be carried out at a relatively low temperature and in a relatively short period of time. Furthermore, relatively high molecular weights can be achieved. The use of lower reaction temperatures and shorter reaction times has the added advantage that there is little if any palladium catalyst decomposition.
- 9,9-di-n-octylfluorene-2,7-di(ethyleneboronate), 2,7-dibromo-9,9-di-n-octylfluorene and a palladium catalyst such as tetrakis(triphenylphosphine)palladium are dissolved in a mixture of toluene and THF (e.g. 1:1 mixture). To this is added two equivalents of a tetraalkylammonium hydroxide as an aqueous solution of concentration at least 20% by weight. The mixture is stirred at room temperature under a flow of nitrogen for 20 min. During this tine, a tetraalkyl ammonium disalt of the kind shown as (1) in FIG. 4 is formed as a white solid precipitate suspended in a single liquid phase The reaction is heated to the reflux temperature of THF (66° C.) during which time the solution viscosity increases as polymer molecular weight increases. The reaction is usually complete within two hours.
- As demonstrated above, this polymerisation can also be carried out in mixtures of water-miscible organic solvents such as THF and non water-miscible non-polar solvents such as toluene. Although the disalt tends to precipitate upon its in-situ formation to give a two phase system., the use of such a solvent mixture can be advantageous as some polymers are more compatible with a polar solvent such as THF whereas others are more soluble in non-polar solvents like toluene. The ability to use such solvent mixtures means that far more polymer types can be prepared without a risk of premature polymer precipitation during polymerisation.
- 9,9-di-n-octylfluorene-2,7-di(ethyleneboronate), 2,7-dibromo-9,9-di-n-octylfluorene and a palladium catalyst such as tetrakis(triphenylphosphine)palladium are dissolved in tetrahydrofuran (THP). To this is added two equivalents of a tetraalkylammonium hydroxide as an aqueous solution of concentration at least 20% by weight. The mixture is stirred at room temperature under a flow of nitrogen for 20 min. During this time, a tetraalkyl ammonium disalt of the kind shown as (1) in FIG. 4 is formed and dissolves in the THF with the other components to give a clear single liquid phase. All the components required for the polymerisation are present in the single liquid phase. The reaction is heated to the reflux temperature of THF (66° C.) during which time the solution viscosity increases as polymer molecular weight increases. After a certain amount of time (e.g. 1 hour) a proportion of a second organic solvent (e.g. toluene) is added and the reaction is continued at the same temperature until further molecular weight increase is not observed (usually a total reaction time of two hours).
- As demonstrated in this example, good results have also been achieved for this polymerisation by starting with a water-miscible polar organic solvent (THF) as in Example 9, and adding a second miscible organic solvent in which the polymer is soluble as the polymerisation proceeds.
- The molecular weights grow gradually with time in these very controlled polymerisations. This has the advantage that repeatable (consistent) and desired molecular weights can be achieved by stopping the reaction at the appropriate stage.
- A three necked 250 ml round bottomed flask fitted with a glass stirring rod attached to an electrical mechanical stirrer (Heidolph RZH 2020), teflon stirring blade, reflux condenser (connected to a nitrogen line) was charged with 9,9-dioctylfluorene-2,7-di(ethylenylboronate) (4.8779 g, 9.09 mmol, 98.8% purity by HPLC), 2,7-dibromo-9,9′-dioctylfluorene ((4.9360 g, 9.0 mmol) 100% purity by HPLC)) and toluene (90 ml). The solution was stirred under nitrogen for a 10 minutes and then 3.5 g of a surfactant solution (10 g of Aliquat 336 and Toluene 25 g) (2.5 mmol Aliquat 336) was added along with 20 ml of 2 M solution of sodium carbonate. The mixture was then stirred at room temperature under nitrogen for a further 15 minutes. The catalyst, tetrakistriphenylphosphinepalladium 31.2 mg, was then added and the reaction mixture was heated and maintained at reflux for 18 hours.
- During this time the reaction mixture was stirred (setting rate 2-3) under an atmosphere of nitrogen. The reaction mixture was observed after 2 hours, but there was no sign of any production of the polymer indicating the slowness of the reaction.
- After 20 hours bromobenzene (1 ml) was added and the reaction mixture was allowed to stir at reflux for a further 20 hours.
- The mixture was allowed to cool to room temperature and poured into 4 L of methanol to precipitate the polymer. The polymer/methanol mixture was then filtered and the polymer was allowed to air dry on the Buchner funnel for five minutes. Aluminium foil was used to cover the top of the Buchner funnel to minimise light exposure.
- Polymer F8 was produced twice according to the above. The polymers obtained had a molecular weight of 170000 and 230000, respectively, showing relatively poor reproducibility.
- FIG. 2 shows in a purely schematic way the order of layers in an electroluminescent device generally designated1. Disposed on
substrate 2, which is typically a transparent substrate such as glass, isanode 3 which may be a layer of transparent indium tin oxide.Adjacent layer 2 ishole transporting layer 3, which may be a polyethylene dioxythiophene, on which is disposedemissive layer 4, which may be a polymer according to the present invention.Layer 5 is an organic electron transport layer.Layer 6 is a cathode which may be a lithium aluminium layer.
Claims (20)
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US09/518,991 US6353072B1 (en) | 1999-03-05 | 2000-03-03 | Polymer preparation from boron derivative functional group-containing monomers |
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US20050123850A1 (en) * | 2003-12-09 | 2005-06-09 | 3M Innovative Properties Company | Thermal transfer of light-emitting dendrimers |
US7524923B1 (en) | 2004-12-30 | 2009-04-28 | Dupont Displays, Inc. | Suzuki polycondensation for preparing aryl polymers from dihalide monomers |
US20100069603A1 (en) * | 2007-02-01 | 2010-03-18 | Sumitomo Chemical Company, Limited | Method for producing structure wherein aromatic polymer is bonded to base, structure having aromatic polymer chain bonded to conductive base, and electronic device comprising the structure |
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KR100697861B1 (en) * | 1998-03-13 | 2007-03-22 | 캠브리지 디스플레이 테크놀로지 리미티드 | Electroluminescent devices |
US6692662B2 (en) * | 2001-02-16 | 2004-02-17 | Elecon, Inc. | Compositions produced by solvent exchange methods and uses thereof |
DE10211648A1 (en) * | 2002-03-15 | 2003-09-25 | Basf Ag | Polymers based on fluoranthene and their use |
GB0226010D0 (en) * | 2002-11-08 | 2002-12-18 | Cambridge Display Tech Ltd | Polymers for use in organic electroluminescent devices |
US9109081B2 (en) * | 2005-02-16 | 2015-08-18 | Sumitomo Chemical Company, Limited | Method for producing aromatic polymer |
US7910653B2 (en) * | 2006-10-04 | 2011-03-22 | E.I. Du Pont De Nemours And Company | Process for the preparation of arylene fluorinated sulfonimide polymers and membranes |
US7868086B2 (en) * | 2006-10-04 | 2011-01-11 | E. I. Du Pont De Nemours And Company | Arylene fluorinated sulfonimide polymers and membranes |
US7838612B2 (en) * | 2006-10-04 | 2010-11-23 | E. I. Du Pont De Nemours And Company | Arylene fluorinated sulfonimide compositions |
US7838594B2 (en) | 2006-10-04 | 2010-11-23 | E.I. Du Pont De Nemours And Company | Bridged arylene fluorinated sulfonimide compositions and polymers |
US8058383B2 (en) | 2006-12-18 | 2011-11-15 | E. I. Du Pont De Nemours And Company | Arylene-fluorinated-sulfonimide ionomers and membranes for fuel cells |
US7745523B1 (en) * | 2008-12-08 | 2010-06-29 | The Goodyear Tire & Rubber Company | Coupling compounds and their uses in rubber compositions and tires |
US20120296065A1 (en) | 2009-12-29 | 2012-11-22 | Ei Du Pont De Nemours And Company | Polyarylene ionomers membranes |
WO2011090705A2 (en) | 2009-12-29 | 2011-07-28 | E. I. Du Pont De Nemours And Company | Polyarylene polymers and processes for preparing |
JP2013515846A (en) | 2009-12-29 | 2013-05-09 | イー・アイ・デュポン・ドウ・ヌムール・アンド・カンパニー | Polyarylene ionomer |
US8642719B2 (en) | 2011-02-28 | 2014-02-04 | Corning Incorporated | Solvent mixture for molecular weight control |
US8901544B2 (en) | 2011-12-06 | 2014-12-02 | Corning Incorporated | Organic thin film transistor with ion exchanged glass substrate |
EP3215515A1 (en) | 2014-11-03 | 2017-09-13 | Life Technologies Corporation | Dibenzosilole monomers and polymers and methods for their preparation and use |
CN108473505B (en) | 2016-03-28 | 2019-11-05 | 阿特生物探索公司 | Polyfluorene simultaneously [4,5-cde] oxepin conjugate and its purposes in analyte detection method |
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US4857630A (en) * | 1987-12-07 | 1989-08-15 | E. I. Du Pont De Nemours And Company | Hyperbranched polyarylene |
DE4236103A1 (en) | 1992-10-26 | 1994-04-28 | Hoechst Ag | Process for the cross-coupling of aromatic boronic acids with aromatic halogen compounds or perfluoroalkyl sulfonates |
DE69608446T3 (en) * | 1995-07-28 | 2010-03-11 | Sumitomo Chemical Company, Ltd. | 2.7 ARYL 9 SUBSTITUTED FLUORESE AND 9 SUBSTITUTED FLUORESOLIGOMERS AND POLYMERS |
US5753757A (en) * | 1996-11-13 | 1998-05-19 | Xerox Corporation | Electroluminescent polymer compositions and processes thereof |
US5777070A (en) | 1997-10-23 | 1998-07-07 | The Dow Chemical Company | Process for preparing conjugated polymers |
DE19846766A1 (en) | 1998-10-10 | 2000-04-20 | Aventis Res & Tech Gmbh & Co | A conjugated fluorene-based polymer useful as an organic semiconductor, electroluminescence material, and for display elements |
-
1999
- 1999-03-05 GB GBGB9905203.7A patent/GB9905203D0/en not_active Ceased
- 1999-10-29 GB GBGB9925653.9A patent/GB9925653D0/en not_active Ceased
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- 2000-03-03 US US09/518,991 patent/US6353072B1/en not_active Expired - Lifetime
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Cited By (4)
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US20050123850A1 (en) * | 2003-12-09 | 2005-06-09 | 3M Innovative Properties Company | Thermal transfer of light-emitting dendrimers |
US20050147849A1 (en) * | 2003-12-09 | 2005-07-07 | 3M Innovative Properties Company | Thermal transfer of light-emitting dendrimers |
US7524923B1 (en) | 2004-12-30 | 2009-04-28 | Dupont Displays, Inc. | Suzuki polycondensation for preparing aryl polymers from dihalide monomers |
US20100069603A1 (en) * | 2007-02-01 | 2010-03-18 | Sumitomo Chemical Company, Limited | Method for producing structure wherein aromatic polymer is bonded to base, structure having aromatic polymer chain bonded to conductive base, and electronic device comprising the structure |
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US20030040595A2 (en) | 2003-02-27 |
US6353072B1 (en) | 2002-03-05 |
GB9925653D0 (en) | 1999-12-29 |
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