CN102786449A - Ionic liquid synthesized from perfluoroalkyl sulfonyl imide alkali metal salt - Google Patents

Ionic liquid synthesized from perfluoroalkyl sulfonyl imide alkali metal salt Download PDF

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CN102786449A
CN102786449A CN2012102613294A CN201210261329A CN102786449A CN 102786449 A CN102786449 A CN 102786449A CN 2012102613294 A CN2012102613294 A CN 2012102613294A CN 201210261329 A CN201210261329 A CN 201210261329A CN 102786449 A CN102786449 A CN 102786449A
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alkali metal
perfluoroalkyl
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metal salt
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聂进
周志彬
周宜轩
徐冰
刘凯
郭鹏
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Huazhong University of Science and Technology
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Huazhong University of Science and Technology
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Abstract

The invention discloses a synthetic method for a perfluoroalkyl sulfonyl imide alkali metal salt (M[Rf<1>SO2NSO2Rf<2>], shortened as M[PFSI], wherein Rf<1> and Rf<2> are equal to CmF2m+1, m is in a range of 1 to 8, and M is Li, Na, K, Rb or Cs). According to the method, a potassium (rubidium or cesium) salt of perfluoroalkyl sulfonamide reacts with perfluoroalkyl sulfonyl fluoride in the presence of potassium (rubidium or cesium) carbonate so as to conveniently prepare a potassium (rubidium or cesium) salt of perfluoroalkyl sulfonyl imide, wherein high yield during the preparation is achieved, and the yield is 70 to 90%; the prepared potassium (rubidium or cesium) salt and lithium (or sodium) perchlorate and the like undergo a double decomposition exchange reaction in an aprotic polar solvent (such as acetonitrile, dimethyl carbonate and nitromethane) so as to obtain a corresponding high purity lithium (or sodium) salt (M[PFSI], wherein M is Li or Na). Hydrophobic functionalized ionic liquid composed of sulfonium, ammonium or phosphonium cations and [PFSI] can be obtained by reacting the prepared alkali metal salt with a sulfonium salt, an ammonium salt or a phosphor salt which contains functionalized functional groups at its side chain.

Description

A kind of by perfluoroalkyl sulfimide an alkali metal salt synthetic ionic liquid
Technical field
The invention belongs to the organic fluorine chemistry synthetic technology, be specifically related to a kind of perfluoroalkyl sulfimide (H [R f 1SO 2NSO 2R f 2], R f 1, R f 2=C mF 2m+1, m=1-8) an alkali metal salt (M [R f 1SO 2NSO 2R f 2], M=Li, Na, K, Rb, preparation method Cs), and by such salt synthetic ionic liquid.
Background technology
Perfluoroalkyl sulfimide (H [R f 1SO 2NSO 2R f 2], hereinafter to be referred as H [PFSI]; R f 1, R f 2=C mF 2m + 1, m=1-8) an alkali metal salt (M [R f 1SO 2NSO 2R f 2], M=Li, Na, K, Rb, Cs; Hereinafter to be referred as M [PFSI]) be one type of important fluorinated organic compound, they have important use value aspect the exploitation of high-performance electrolyte and new catalyst.
The general structure of perfluoroalkyl sulfimide an alkali metal salt is suc as formula shown in (I):
Figure BDA00001935923700011
Wherein: M +=Li, Na, K, Rb or Cs,
R f 1＝C mF 2m+1，m＝1-8，
R f 2＝C mF 2m+1，m＝1-8，
And
R f 1And R f 2Identical or inequality.
Relevant M's [PFSI] is synthetic, mainly contains two kinds of methods at present.A kind of is by the reaction of the sodium salt of perfluoroalkyl sulfonyl fluoride and the trimethyl silicon based perfluoroalkyl sulphonamide of N-, the sodium salt of synthesizing perfluoroalkyl sulfimide; Sodium salt with vitriol oil acidifying after distillation obtain imines, imines again with corresponding alkali or oxide compound reaction, just can prepare different perfluoroalkyl sulfimide metal-salts.The productive rate of this method is higher, and product gas purity is also higher, but the experimental implementation condition is harsh, and complex operation, cost are also higher.(referring to: J.N.Meu β doerffer, H.Niederprum, Chem.Ztg.1972,96,582; J.Foropoulos, D.D.DesMarteau, Inorg.Chem.1984,23,3720; L Q.Hu, D.D.DesMarteau, Inorg.Chem.1993,32,5007; D.D.DesMarteau, W.T.Pennington, V.Montanari, B.H.Thomas, J.Fluorine Chem., 2003,122,57; M.Armand, EP 364340,1990.).
The method of another kind of synthetic M [PFSI]; Be by perfluoroalkyl sulfonyl fluoride or SULPHURYL CHLORIDE and perfluoroalkyl sulphonamide; Be the quaternary ammonium salt that reaction makes the perfluoroalkyl sulfimide under the condition of acid binding agent at triethylamine, make corresponding salt with alkali (like Lithium Hydroxide MonoHydrate) reaction again.This method reaction conditions is gentle, but the productive rate of inferior amine salt is not high, and is difficult for purifying.(referring to: S.Singh, D.D.DesMarteau, Inorg.Chem., 1990,29,2982; R.D.Howells, W.M.Lamanna, A.D.Fanta, J.E.Waddell, WO 9723448,1997; H.Sakaguchi, S.Sakai, H.Takase, JP 11209338,1999; M.C.Doyle, A.E.Feiring, S.K.Choi, WO 9967304,1999; A.E.Feiring, W.R.Wonchoba, J.Fluorine Chem., 2000,1105,129; K.Morisaki, M.Sasaki, JP 2000086617,2000.)
Except the method for above-mentioned two kinds of main synthetic M [PFSI], also has some other compound method.As adopting (CF 3SO 2) 2O, urea and CF 3SO 3The H reaction, but the cost of this method is higher, is not suitable for large-scale production synthetic (M.Armand, EP 096629,1983.).And for example report such as Sogabe utilizes perfluoroalkyl sulfonyl fluoride and trifluoroacetamide or ethanamide in the presence of salt of wormwood, to react, can prepare a series of perfluoroalkyl sulfimides sylvite (K.Sogabe, JP 2,001 233849,2001; K.Sogabe, Y.Hasegawa, Y.Wada, T.Kitamura, S.Yanagida; Chem.Lett., 2000,944.), be insecure but nearest result proves this method, the acidity that its reason is considered to ethanamide is strong inadequately; Make the sulfonic acid fluoride more easily and salt of wormwood effect and hydrolysis takes place, the principal product of generation then is that the sylvite of perfluoro alkyl sulfonic acid is (referring to S.K.Quek, I.M.Lyapkalo, H.V.Huynh; Tetrahedron, 2006,62,3137.).Recently, have report with the reaction of corresponding sulfonic acid fluoride and benzylamine after, generate N-benzyl group with imine moiety with the trifluoromethyl sulfonic acid anhydride effect again.And this N-benzyl group with imine moiety very easy benzyl of taking off in the presence of alcohol can make various fluorine-containing sulfimide salt with the alkali effect again.The productive rate of this compound method is higher, but cost is also higher.(referring to: F.Toulgoat, B.R.Langlois, M.Medebielle, J.Y.Sanchez, J.Org.Chem., 2008,73,5613.)
On the other hand, with the reaction of compounds such as M [PFSI] and quaternary ammonium salt, can form ionic liquid at room temperature, these ionic liquids have the potential using value as nonaqueous electrolyte material in energy storage devices such as serondary lithium battery, ultracapacitor; In organic synthesis, catalyzed reaction etc., has the potential using value as solvent.Nonaqueous electrolyte is one of critical material of energy storage devices such as high specific energy secondary lithium (ion) battery, and its over-all properties (like chemistry and electrochemical stability, security etc.) directly influences the use of lithium (ion) battery.And ionic liquid is considered to the flame retardancy safety type electrolysis material that a new generation has application prospect because of having excellent properties such as high and good chemistry of extremely low vp, difficult combustion, the liquid journey of broad, electric conductivity and thermo-chemical stability.About the application of the ionic liquid of M [PFSI] at aspects such as electrolyte and organic chemical reactionses; Although existing a large amount of bibliographical information; But the positively charged ion in the present ionic liquid, the positively charged ion that mainly still is common imidazoles or quaternary ammonium salt type is (referring to representative document in recent years: S.Maehama, H.Yoshimura; JP 2005200359,2005; M.Kikuta, H.Uchimura, A.Hatakeyama, JP2007182410,2007; A.Kawada, A.Tashiro, T.Kumagai, WO 2008108221,2008; J.Rymarczyk, M.Carewska, G.B.Appetecchi, F.Alessandrini, S.Passerini, Eur.Polymer J., 2008,44,2153-2161; S.Seki, Y.Ohno, H.Miyashiro, Y.Kobayashi, A.Usami; Y.Mita, N.Terada, K.Hayamizu, S.Tsuzuki, M.Watanabe; J.Electrochem.Soc., 2008,155, A421-A427.), and it is also rare to contain the cationic ionic liquid of multifunction side chain.
Summary of the invention
The object of the present invention is to provide a kind of perfluoroalkyl sulfimide an alkali metal salt (M [R f 1SO 2NSO 2R f 2], be called for short M [PFSI]; Wherein, R f 1, R f 2=C mF 2m+1, m=1-8, M=Li, Na, K, Rb, preparation method Cs) makes it have characteristics such as operation goes on foot simply, the easily separated purification of product, productive rate height.
Another object of the present invention is to provide by perfluoroalkyl sulfimide an alkali metal salt synthetic ionic liquid.
The preparation method of perfluoroalkyl sulfimide an alkali metal salt provided by the invention utilizes the potassium of perfluoroalkyl sulphonamide (rubidium, caesium) salt and perfluoroalkyl sulfonyl fluoride or SULPHURYL CHLORIDE; Prepared in reaction perfluoroalkyl sulfimide salt in the presence of salt of wormwood (rubidium, caesium), this method is not seen bibliographical information as yet.
The method for preparing perfluoroalkyl sulfimide an alkali metal salt provided by the invention is following:
1. prepare method with following formula (II) an alkali metal salt:
Figure BDA00001935923700041
Wherein: M 1 +Be K, Rb or Cs,
R f 1＝C mF 2m+1，m＝1-8，
R f 2＝C mF 2m+1，m＝1-8，
And
R f 1And R f 2Identical or inequality.
Present method may further comprise the steps:
(1) potassium (rubidium, caesium) salt, perfluoroalkyl sulfonic acid halide (SULPHURYL CHLORIDE or sulfonic acid fluoride), the salt of wormwood (rubidium, caesium) with the perfluoroalkyl sulphonamide is that mixing in 1: 1: 1～1: 1.2: 1.2 places reaction flask in molar ratio;
(2) organic solvent acetonitrile of 5～10 times of volumes of adding reacted 8～24 hours down at 25～70 ℃;
(3) boil off solvent and get white solid, add the solvents tetrahydrofurane of 3～5 volumes then;
(4) stir 0.5～1 hour under the room temperature after, remove by filter insolubles;
(5) will filtrate concentrate boil off solvent after, carry out recrystallization with methyl alcohol or propyl carbinol, with crystal filter,
After the drying, obtain potassium (rubidium, caesium) the salt solid of accordingly colourless perfluoroalkyl sulfimide.
2. prepare method with an alkali metal salt of following formula (III),
Figure BDA00001935923700051
Wherein, M 2 +Be Li or Na,
R f 1＝C mF 2m+1，m＝1-8，
R f 2＝C mF 2m+1，m＝1-8，
And
R f 1And R f 2Identical or inequality.
Present method is with an alkali metal salt of formula (II) and waits the perchloric acid of mole number or the lithium salts or the sodium salt of Tetrafluoroboric acid in organic aprotic polar solvent, to carry out replacement(metathesis)reaction; Organic aprotic polar solvent described herein is the organic salt of solubilized formula (II) or formula (III) but does not dissolve potassium tetrafluoroborate or organic aprotic polar solvent of potassium perchlorate inorganic salt, like methylcarbonate, acetonitrile or Nitromethane 99Min. etc.
The another kind of method of an alkali metal salt of preparation formula provided by the invention (III) is: will wait lithium salts or the sodium salt of perchloric acid or the Tetrafluoroboric acid of mole number to join in the aforesaid method for preparing formula (II) an alkali metal salt in step (5) the gained filtrating; Stir 1～3 hour after-filtration under the room temperature, add isopyknic CH 2Cl 2Recrystallization after solid filtering, drying, obtains corresponding colourless lithium salts or sodium salt solid.
Ionic liquid provided by the invention is by two (perfluoroalkyl sulphonyl) imines (H [the PFSI]) negatively charged ion with following formula (IV)
(IV)
Wherein: R f 1=C mF 2m+1, m=1-8,
R f 2＝C mF 2m+1，m＝1-8，
And
R f 1And R f 2Identical or inequality;
Be selected from of sulfonium, ammonium, the microcosmic salt cation composition of following formula V to (XII).
Figure BDA00001935923700062
Figure BDA00001935923700071
The substituent R of formula V in (XII) wherein 1, R 2, R 3, R 4Identical or inequality, and have following implication respectively, separately or jointly:
1. C 1-C 12Alkyl, preferential C 1-C 4Alkyl; 2. substituted alkyl-(CH 2) nY (n=1-8; Y=CN); 3.-(CH 2CH 2O) x(CH 2) yCH 3(x=1-12; Y=0-4); 4.-CH 2O (CH 2) zCH 3(z=0-4).
Provided by the invention by M [PFSI] and quaternary ammonium salt prepared in reaction by [PFSI] -The ionic liquid that negatively charged ion and quaternary ammonium cation are formed; Promptly be: with an alkali metal salt and sulfonium salt, ammonium salt or the microcosmic salt reaction of aforesaid formula (II), formula (III), can obtain corresponding sulfonium, ammonium or phosphorus positively charged ion and [PFSI] respectively by the negatively charged ion of formula (IV) and the preparation method of ionic liquid of formula V to formula (XII) cation composition -The hydrophobic ionic liquid of forming.
Innovative point of the present invention is; Earlier the perfluoroalkyl sulphonamide is processed potassium (rubidium, caesium) salt; So just improved the nucleophilic attack ability of nitrogen-atoms on the sulphonamide greatly; Reaction is carried out to the direction that helps generating title product sulfimide salt, also just significantly reduced sulfonic acid fluoride or SULPHURYL CHLORIDE in reaction with the possibility of salt of wormwood (rubidium, caesium) effect hydrolytic reactions, thereby accelerated to generate sulfimide speed of response, improved the productive rate of reaction.This method is particularly suitable for preparing the perfluoroalkyl sulfimide salt of short chain, like two (trifluoromethyl sulphonyl) imines potassium (rubidium, caesium) salt (MN (SO 2CF 3) 2, be called for short M [TFSI]).Through this an alkali metal salt (M [PFSI], M=K, Rb; Cs) with the metathesis exchange reaction of (like methylcarbonate, acetonitrile, Nitromethane 99Min. etc.) in aprotic polar solvent such as lithium perchlorate (or sodium); Obtain highly purified corresponding lithium (or sodium) salt (M [PFSI], M=Li, Na).
The present invention is in positively charged ion, to have introduced ehter bond (O-), itrile group is (CN) etc. to alkali metal cation at the innovative point of ionic liquid aspect synthetic; Lithium ion particularly; Have certain coordination with (or) flexible functional group; Make ion liquid fusing point and viscosity reduce, the solubleness of ionogen conducting salt (like lithium salts etc.) in ionic liquid is increased, satisfy the big electric current impulse electricity requirement of energy storage devices such as lithium cell.The positively charged ion parent that the present invention adopted is aliphatic alkyl sulfonium, substituted imidazole, aliphatic alkyl quaternary ammonium, alicyclic quaternary ammonium alkyl, aliphatics quaternary phosphonium cations etc.These positively charged ions and [PFSI] -The ionic liquid that negatively charged ion forms has potential using value in fields such as electrolyte, organic synthesis, catalysis.
Adopt an alkali metal salt of aforesaid method synthesizing perfluoroalkyl alkylsulfonyl imines, productive rate and purity easy and simple to handle, product are all very high, can as the lithium salts in the ionogen or be used for Preparation of catalysts and high-performance ion liquid synthetic.Among the present invention, use above-mentioned synthetic sylvite, lithium salts and with sulfonium salt, ammonium salt or microcosmic salt reaction, synthesized the ionic liquid of a series of novel structures.
Description of drawings
Fig. 1: the infrared spectrogram (KBr compressing tablet) of two (trifluoromethyl sulphonyl) imines potassium (K [TFSI]), main absorption peak is (cm -1): 1320 (s), 1200 (s), 1120 (s), 1020 (m).
Fig. 2: two (trifluoromethyl sulphonyl) imines potassium (K [TFSI]) 19F NMR figure, 19F NMR (acetonitrile-d 3, CCl 3F, 376.5MHz): δ=-78.6ppm (s).
Embodiment
Enumerate part of compounds involved in the present invention preparation below, the present invention being done further detailed explanation, but the preparation method of embodiment is not restricted to the preparation of cited compound.
Embodiment 1-12 relates to the preparation of M [PFSI]
Embodiment 1: the preparation of two (trifluoromethyl sulphonyl) imines potassium (K [TFSI]).
The building-up reactions route is following:
26.4 gram (0.14mol) trifluoromethyl sulphonamide sylvite, 13.4 gram (0.097mol) Anhydrous potassium carbonates are placed 250 milliliters there-necked flask; Add 150 milliliters of acetonitriles and make solvent; The trifluoromethyl SULPHURYL CHLORIDE that adds 24.0 grams (0.14mol) then, room temperature reaction is 8 hours under stirring.
Underpressure distillation gets white solid after removing and desolvating, and adds 150 milliliters of THFs, stirs 0.5 hour under the room temperature, removes by filter insolubles.The filtrate decompression distillation, remaining solid carries out recrystallization with propyl carbinol, after filtration, the drying, gets K [TFSI] solid of 39.2 grams (0.12mol), productive rate 88%. 19F?NMR(acetonitrile-d 3，CCl 3F，376.5MHz)：δ＝-78.6ppm(s)。
Embodiment 2: the preparation of two (trifluoromethyl sulphonyl) imines lithium (Li [TFSI]).
The building-up reactions route is following:
K[N(SO 2CF 3) 2]+LiClO 4→Li[N(SO 2CF 3) 2]+KClO 4
In vacuum glove box, the K [TSFI] of 31.9 grams (0.1mol) is dissolved in 50 milliliters the acetonitrile solvent, gradation adds equimolar lithium perchlorate then.At room temperature stirring reaction removed by filter undissolved potassium perchlorate after 20 hours.Filtrating is concentrated into about 20mL, adds isopyknic CH 2Cl 2Carry out recrystallization.Filtration, CH 2Cl 2Washing, vacuum-drying get 27.3 gram (0.095mol) white solid powder Li [TFSI]. 19FNMR(acetonitrile-d 3，CCl 3F，376.5MHz)：δ＝-78.8ppm(s)。
Embodiment 3: the preparation of two (trifluoromethyl sulphonyl) imines sodium (Na [TFSI]).
The building-up reactions route is following:
K[N(SO 2CF 3) 2]+NaClO 4→Na[N(SO 2CF 3) 2]+KClO 4
In vacuum glove box, 31.9 gram (0.1mol) K [TSFI] are dissolved in 50 milliliters the acetonitrile solvent, gradation adds equimolar sodium perchlorate then.At room temperature stirring reaction removed by filter the nonsoluble potassium perchlorate after 24 hours.Filtrating is concentrated into about 20mL, adds isopyknic CH 2Cl 2Carry out recrystallization.Filtration, CH 2Cl 2Washing, vacuum-drying get 28.2 gram (0.093mol) white solid powder Na [TFSI]. 19F?NMR(acetonitrile-d 3，CCl 3F，376.5MHz)：δ＝-78.7ppm(s)。
Embodiment 4:K [N (SO 2CF 3) (SO 2C 2F 5)] synthetic.
The building-up reactions route is following:
28.0 gram (0.15mol) trifluoromethyl sulphonamide sylvite, 16.4 gram (0.12mol) Anhydrous potassium carbonates are placed 250 milliliters there-necked flask; The acetonitrile that adds 150 milliliters is made solvent; The perfluor ethyl chloride that adds 34.0 grams (0.156mol) then, room temperature reaction is 10 hours under stirring.
Underpressure distillation gets white solid after removing and desolvating, and adds 150 milliliters of THFs, stirs 0.5 hour under the room temperature, refilters and removes insolubles.The filtrate decompression distillation, remaining solid carries out recrystallization with propyl carbinol, after filtration, the drying, gets the KN (SO of 45.4 grams (0.123mol) 2CF 3) (SO 2C 2F 5) solid, productive rate 82%. 19F?NMR(acetonitrile-d 3，CCl 3F，376.5MHz)：δ＝-78.4(CF 3)，-79.1(CF 3)，-116.7ppm(CF 2)。
Embodiment 5:K [N (SO 2CF 3) (SO 2C 4F 9)] synthetic.
The building-up reactions route is following:
Figure BDA00001935923700102
25.7 gram (0.14mol) trifluoromethyl sulphonamide sylvite, 10.4 gram (0.075mol) Anhydrous potassium carbonates are placed 250 milliliters there-necked flask; The acetonitrile that adds 150 milliliters is made solvent; The perfluoro butyl sulfonic acid fluoride that adds 44.1 grams (0.146mol) then stirs down 50 ℃ of reactions 12 hours.
Underpressure distillation gets white solid after removing and desolvating, and adds 180 milliliters of THFs, stirs 1 hour under the room temperature, refilters and removes insolubles.The filtrate decompression distillation, remaining solid carries out recrystallization with propyl carbinol, after filtration, the drying, gets the KN (SO of 56.3 grams (0.12mol) 2CF 3) (SO 2C 4F 9) solid, productive rate 86%. 19F?NMR(acetonitrile-d 3，CCl 3F，376.5MHz)：δ＝-78.7(CF 3)，-80.2(CF 3)，-112.5(CF 2)，-120.3(CF 2)，-125.1ppm(CF 2)。
Embodiment 6:K [N (SO 2CF 3) (SO 2C 8F 17)] synthetic.
The building-up reactions route is following:
24.0 gram (0.11mol) trifluoromethyl sulphonamide sylvite, 12.4 gram (0.09mol) Anhydrous potassium carbonates are placed 250 milliliters there-necked flask; The acetonitrile that adds 180 milliliters is made solvent; The full-fluorine octyl sulfuryl fluoride that adds 60.2 grams (0.12mol) then stirs down 70 ℃ of reactions 18 hours.
Underpressure distillation gets light yellow solid after removing and desolvating, and adds 200 milliliters of THFs, stirs 1 hour under the room temperature, refilters and removes insolubles.The filtrate decompression distillation, remaining solid carries out recrystallization with propyl carbinol, after filtration, the drying, gets the KN (SO of 55.5 grams (0.083mol) 2CF 3) (SO 2C 8F 17) solid, productive rate 75%. 19F?NMR(acetonitrile-d 3，CCl 3F，376.5MHz)：δ＝-78.5(CF 3)，-80.3(CF 3)，-112.5(CF 2)，-118.2(CF 2)，-120.1～-120.6(m，CF 2)，-121.8(CF 2)，-125.4ppm(CF 2)。
Embodiment 7:K [N (SO 2C 2F 5) 2] synthetic.
The building-up reactions route is following:
Figure BDA00001935923700121
35.5 gram (0.15mol) perfluor ethyl sulfonamide sylvite, 17.4 gram (0.126mol) Anhydrous potassium carbonates are placed 250 milliliters there-necked flask; The acetonitrile that adds 200 milliliters is made solvent; The perfluor ethyl chloride that adds 34.5 grams (0.159mol) then, room temperature reaction is 24 hours under stirring.
Underpressure distillation gets white solid after removing and desolvating, and adds 180 milliliters of THFs, stirs 0.5 hour under the room temperature, removes by filter insolubles.The filtrate decompression distillation is carried out recrystallization with ethanol, after filtration, the drying, gets the KN (SO of 53.4 grams (0.127mol) 2C 2F 5) 2Solid, productive rate 85%. 19F?NMR(acetonitrile-d 3，CCl 3F，376.5MHz)：δ＝-78.7(CF 3)，-117.0ppm(CF 2)。
Embodiment 8:K [N (SO 2C 2F 5) (SO 2C 4F 9)] synthetic.
The building-up reactions route is following:
Figure BDA00001935923700122
23.5 gram (0.099mol) perfluor ethyl sulfonamide sylvite, 9.9 gram (0.072mol) Anhydrous potassium carbonates are placed 150 milliliters there-necked flask; The acetonitrile that adds 100 milliliters is made solvent; The perfluoro butyl sulfonic acid fluoride that adds 30.7 grams (0.102mol) then stirs down 50 ℃ of reactions 15 hours.
Get white solid after the removal of solvent under reduced pressure, add 150 milliliters of THFs, stirred 1 hour under the room temperature, remove insolubles after worry.The solvent of filtrating is removed, carried out recrystallization, after filtration, the drying, get the KN (SO of 41.4 grams (0.080mol) with ethanol 2C 2F 5) (SO 2C 4F 9) solid, productive rate 80%. 19F?NMR(acetonitrile-d 3，CCl 3F，376.5MHz)：δ＝-78.4(CF 3)，-116.9(CF 2)，-80.8(CF 3)，-112.7(CF 2)，-120.5(CF 2)，-125.8ppm(CF 2)。
Embodiment 9:K [N (SO 2C 2F 5) (SO 2C 8F 17)] synthetic.
The building-up reactions route is following:
Figure BDA00001935923700131
33.2 gram (0.14mol) perfluor ethyl sulfonamide sylvite, 16.0 gram (0.116mol) Anhydrous potassium carbonates are placed 250 milliliters there-necked flask; The acetonitrile that adds 150 milliliters is made solvent; The full-fluorine octyl sulfuryl fluoride that adds 70.3 grams (0.14mol) then stirs down 70 ℃ of reactions 15 hours.
Underpressure distillation gets light yellow solid after removing and desolvating, and adds 200 milliliters of THFs, stirs 1 hour under the room temperature, refilters and removes insolubles.The filtrate decompression distillation, remaining solid carries out recrystallization with ethanol, after filtration, the drying, gets the KN (SO of 73.5 grams (0.10mol) 2C 2F 5) (SO 2C 8F 17) solid, productive rate 73%. 19F?NMR(acetonitrile-d 3，CCl 3F，376.5MHz)：δ＝-78.4(CF 3)，-116.6(CF 2)，-80.4(CF 3)，-112.7(CF 2)，-118.2(CF 2)，-120.0～-120.6(m，CF 2)，-121.8(CF 2)，-125.6ppm(CF 2)。
Embodiment 10:K [N (SO 2C 4F 9) 2] synthetic.
The building-up reactions route is following:
Figure BDA00001935923700132
33.7 gram (0.10mol) perfluoro butyl sulphonamide sylvite, 10.5 gram (0.076mol) Anhydrous potassium carbonates are placed 250 milliliters there-necked flask; The acetonitrile that adds 150 milliliters is made solvent; Add 34.0 gram (0.11mol) perfluoro butyl sulfonic acid fluorides then, stir down 50 ℃ of reactions 20 hours.
Underpressure distillation gets white solid after removing and desolvating, and adds 150 milliliters of THFs, stirs 1 hour under the room temperature, refilters and removes insolubles.The filtrate decompression distillation, remaining solid carries out recrystallization with propyl carbinol, after filtration, the drying, gets the KN (SO of 50.8 grams (0.082mol) 2C 4F 9) 2Solid, productive rate 82%. 19F?NMR(acetonitrile-d 3，CCl 3F，376.5MHz)：δ＝-80.4(CF 3)，-112.6(CF 2)，-120.4(CF 2)，-125.7ppm(CF 2)。
Embodiment 11:K [N (SO 2C 4F 9) (SO 2C 8F 17)] synthetic.
The building-up reactions route is following:
16.9 gram (0.05mol) perfluoro butyl sulphonamide sylvite, 5.0 gram (0.036mol) Anhydrous potassium carbonates are placed 100 milliliters there-necked flask; The acetonitrile that adds 60 milliliters is made solvent; The full-fluorine octyl sulfuryl fluoride that adds 35.3 grams (0.07mol) then stirs down 70 ℃ of reactions 20 hours.
Underpressure distillation gets light yellow solid after removing and desolvating, and adds 80 milliliters of THFs, stirs 1 hour under the room temperature, refilters and removes insolubles.The filtrate decompression distillation, remaining solid carries out recrystallization with methyl alcohol, after filtration, the drying, gets the KN (SO of 29.1 grams (0.0355mol) 2C 4F 9) (SO 2C 8F 17) solid, productive rate 71%. 19F?NMR(acetonitrile-d 3，CCl 3F，376.5MHz)：δ＝-80.6(CF 3)，-112.2(CF 2)，-120.8(CF 2)，-125.6(CF 2)，-80.6(CF 3)，-112.9(CF 2)，-118.5(CF 2)，-120.1～-120.5(m，CF 2)，-121.6(CF 2)，-125.3ppm(CF 2)。
Embodiment 12:K [N (SO 2C 8F 17) 2] synthetic.
The building-up reactions route is following:
Figure BDA00001935923700142
26.9 gram (0.054mol) perfluorinated octyl sulfuryl amine sylvite, 5.0 gram (0.036mol) Anhydrous potassium carbonates are placed 150 milliliters there-necked flask; The acetonitrile that adds 100 milliliters is made solvent; The full-fluorine octyl sulfuryl fluoride that adds 36.5 grams (0.072mol) then stirs down 70 ℃ of reactions 24 hours.
Underpressure distillation gets light yellow solid after removing and desolvating, and adds 100 milliliters of THFs, stirs 1 hour under the room temperature, refilters and removes insolubles.The filtrate decompression distillation, remaining solid carries out recrystallization with methyl alcohol, after filtration, the drying, gets the KN (SO of 35.1 grams (0.034mol) 2C 8F 17) 2Solid, productive rate 64%. 19F?NMR(acetone-d 6，CCl 3F，376.5MHz)：δ＝-80.2(CF 3)，-114.7(CF 2)，-120.5(CF 2)，-121.5～-121.7(m，CF 2)，-122.5(CF 2)，-125.7ppm(CF 2)。
Embodiment 13-19 relates to the ion liquid preparation of H [PFSI]
The cited ion liquid general preparation method of following examples is following: will wait mol alkali metal-salt (like K [TFSI]), and the halogenide of sulfonium salt, ammonium salt or microcosmic salt (is mainly Br -Or I -Salt) be dissolved in respectively in the appropriate amount of deionized water and (be generally 20mmol salt and be dissolved in the 10mL deionized water), mixed at room temperature then, the induction stirring reaction is after 30 minutes, standing demix.Tell lower floor's liquid with separating funnel, be dissolved in 20～30mL methylene dichloride, use deionized water wash again 3 times, use the 5mL water washing at every turn, after dichloromethane solvent is removed in decompression, dry 12 hours of 90 ℃ of vacuum decompressions, colourless or light yellow ionic liquid.With embodiment 13 is example, and other embodiment intermediate ion liquid are by the similar approach preparation.
Embodiment 13: ionic liquid [(CH 3CH 2) 2N (CH 2CH 2OCH 3) 2] [TFSI]
By [(CH 3CH 2) 2N (CH 2CH 2OCH 3) 2] Br and the preparation of K [TFSI] room temperature reaction.Concrete operations are following: with 5.4g (20mmol) [(CH 3CH 2) 2N (CH 2CH 2OCH 3) 2] Br and 6.2g (20mmol) K [TFSI], be dissolved in respectively in the 10mL deionized water, after the two solution mixed; Induction stirring reaction 30 minutes, standing demix, lower floor is dissolved in the 20mL methylene dichloride; Deionized water wash 3 times (3 * 5mL), after dichloromethane solvent is removed in decompression, dry 12 hours of 90 ℃ of vacuum decompressions; Get 8.0 gram (17mmol) colourless liquids, productive rate 85%.
Nuclear magnetic resonance data: 1H NMR (acetone-d 6, TMS, 400MHz): δ=1.39 (t, 2 * 3H), 3.37 (s, 2 * 3H), 3.64 (q, 2 * 2H), 3.74ppm (t, 2 * 2H); 19F NMR (acetone-d 6, CCl 3F, 376.5MHz): δ=-79.9ppm (s).Ultimate analysis: theoretical value C 12H 24F 6N 2O 6S 2: C, 30.64; H, 5.14; N, 5.95; Experimental value C, 30.57; H, 4.99; N, 6.12.
Embodiment 14: ionic liquid [CH 3N (CH 2CH 2OCH 3) 3] [TFSI]
By [CH 3N (CH 2CH 2OCH 3) 3] I and the preparation of K [TFSI] room temperature reaction.
Colourless liquid, productive rate 88%.Nuclear magnetic resonance data: 1H NMR (acetone-d 6, TMS, 400MHz): δ=3.35 (t, 3H), 3.37 (s, 3 * 3H), 3.88 (m, 3 * 2H), 3.92ppm (m, 3 * 2H); 19FNMR (acetone-d 6, CCl 3F, 376.5MHz): δ=-79.8ppm (s).Ultimate analysis: theoretical value C 12H 24F 6N 2O 7S 2: C, 29.63; H, 4.97; N, 5.76; Experimental value C, 29.89; H, 4.86; N, 5.92.
Embodiment 15: ionic liquid [CH 3CH 2N (CH 2CH 2OCH 3) 3] [TFSI]
By [CH 3CH 2N (CH 2CH 2OCH 3) 3] Br and the preparation of K [TFSI] room temperature reaction.
Colourless liquid, productive rate 92%.Nuclear magnetic resonance data: 1H NMR (acetone-d 6, TMS, 400MHz): δ=1.40 (t, 3H), 3.36 (s, 3 * 3H), 3.71 (q, 2H), 3.81 (t, 3 * 2H), 3.88ppm (brs, 3 * 2H); 19F NMR (acetone-d 6, CCl 3F, 376.5MHz): δ=-79.8ppm (s).Ultimate analysis: theoretical value C 13H 26F 6N 2O 7S 2: C, 31.20; H, 5.24; N, 5.60; Experimental value C, 31.55; H, 4.98; N, 5.43.
Embodiment 16: ionic liquid [(CH 3OCH 2CH 2) 4N] [TFSI]
By [(CH 3OCH 2CH 2) 4N] I and the preparation of K [TFSI] room temperature reaction.
Colourless liquid, productive rate 88%.Nuclear magnetic resonance data: (acetone-d 6, TMS, 400MHz): δ=3.33 (brs, 4 * 3H), 3.87-3.93 (m, 8 * 2H); 19F NMR (acetone-d 6, CCl 3F, 376.5MHz): δ=-79.8ppm (s).Ultimate analysis: theoretical value C 14H 28F 6N 2O 8S 2: C, 31.70; H, 5.32; N, 5.28; Experimental value C, 31.35; H, 5.36; N, 5.26.
Embodiment 17: ionic liquid [(CH 3) 3NCH 2CH 2CN] [TFSI]
By [(CH 3) 3NCH 2CH 2CN] Br and the preparation of K [TFSI] room temperature reaction.
Light yellow liquid, productive rate 80%.Nuclear magnetic resonance data: 1H NMR (acetone-d 6, TMS, 400MHz): δ=3.33 (t, 2H), 3.42 (s, 3 * 3H), 3.98ppm (t, 2H); 19F NMR (acetone-d 6, CCl 3F, 376.5MHz): δ=-79.8ppm (s).Ultimate analysis: theoretical value C 8H 13F 6N 3O 4S 2: C, 24.43; H, 3.33; N, 10.68; Experimental value C, 24.57; H, 3.35; N, 11.00.
Embodiment 18: ionic liquid [(CH 3) 2(CH 3CH 2) NCH 2CH 2CN] [TFSI]
By [(CH 3) 2(CH 3CH 2) NCH 2CH 2CN] Br and the preparation of K [TFSI] room temperature reaction.
Colourless liquid, productive rate 82%.Nuclear magnetic resonance data: 1H NMR (acetone-d 6, TMS, 400MHz): δ=1.53 (t, 3H), 3.33 (t, 2H), 3.38 (s, 2 * 3H), 3.73 (q, 2H), 3.96ppm (t, 2H); 19F NMR (acetone-d 6, CCl 3F, 376.5MHz): δ=-79.8ppm (s).Ultimate analysis: theoretical value C 9H 15F 6N 3O 4S 2: C, 26.54; H, 3.71; N, 10.32; Experimental value C, 26.51; H, 3.82; N, 10.00.
Embodiment 19: ionic liquid [(CH 3) (CH 3CH 2) 2NCH 2CH 2CN] [TFSI]
By [(CH 3) (CH 3CH 2) 2NCH 2CH 2CN] I and the preparation of K [TFSI] room temperature reaction.
Colourless liquid, productive rate 85%.Nuclear magnetic resonance data: 1H NMR (acetone-d 6, TMS, 400MHz): δ=1.49 (t, 2 * 3H), 3.29 (s, 3H), 3.29 (t, 2H), 3.67 (q, 2 * 2H), 3.92ppm (t, 2H); 19F NMR (acetone-d 6, CC1 3F, 376.5MHz): δ=-79.8ppm (s).Ultimate analysis: theoretical value C 10H 17F 6N 3O 4S 2: C, 28.50; H, 4.07; N, 9.97; Experimental value C, 28.16; H, 4.22; N, 10.22.

Claims (4)

1. by perfluoroalkyl sulfimide negatively charged ion with following formula (IV)
Wherein:
R f 1＝C mF 2m+1，m＝1-8；R f 2＝C mF 2m+1，m＝1-8；
And R f 1And R f 2Identical or inequality;
With the ionic liquid that is selected from the sulfonium of following formula V to (XII), ammonium, microcosmic salt cation composition,
Figure FDA00001935923600012
The substituent R of formula V in (XII) wherein 1, R 2, R 3, R 4Identical or inequality, and have following implication respectively, separately or jointly: 1. C 1-C 12Alkyl, preferential C 1-C 4Alkyl; 2. substituted alkyl-(CH 2) nY (n=1-8; Y=CN); 3.-(CH 2CH 2O) x(CH 2) yCH 3(x=1-12; Y=0-4); 4.-CH 2O (CH 2) zCH 3(z=0-4).
2. ion liquid compound method according to claim 1; It is characterized in that; Will be with an alkali metal salt of following formula (II) or with an alkali metal salt and sulfonium salt, ammonium salt or the microcosmic salt reaction of following formula (III); Promptly obtain the hydrophobic ionic liquid that sulfonium, ammonium or phosphorus positively charged ion and perfluoroalkyl sulfimide negatively charged ion are formed
Figure FDA00001935923600021
In the formula (II): M 1 +Be K, Rb or Cs; R f 1=C mF 2m+1, m=1-8;
R f 2=C mF 2m+1, m=1-8; And R f 1And R f 2Identical or inequality;
Figure FDA00001935923600022
In the formula (III), M 2 +Be Li or Na; R f 1=C mF 2m+1, m=1-8;
R f 2=C mF 2m+1, m=1-8; And R f 1And R f 2Identical or inequality.
3. ion liquid compound method according to claim 2 is characterized in that, an alkali metal salt of formula (II) is the product by following method preparation:
(1) potassium (rubidium, caesium) salt, perfluoroalkyl sulfo nyl acyl chlorides or sulfonic acid fluoride, the salt of wormwood (rubidium, caesium) with the perfluoroalkyl sulphonamide is that mixing in 1: 1: 1～1: 1.2: 1.2 places reaction flask in molar ratio;
(2) organic solvent acetonitrile of 5～10 times of volumes of adding reacted 8～24 hours down at 25～70 ℃;
(3) boil off solvent and get white solid, add the solvents tetrahydrofurane of 3～5 volumes then;
(4) stir 0.5～1 hour under the room temperature after, remove by filter insolubles;
(5) will filtrate concentrate boil off solvent after, carry out recrystallization with alcohol, crystal is filtered, after the drying, obtains potassium (rubidium, caesium) the salt solid of colourless perfluoroalkyl sulfimide.
4. ion liquid compound method according to claim 2; It is characterized in that an alkali metal salt of formula (III) is the product by following method preparation: an alkali metal salt and the perchloric acid that waits mole number or the lithium salts or the sodium salt of Tetrafluoroboric acid of formula (II) are carried out replacement(metathesis)reaction in organic aprotic polar solvent.
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