咪唑类离子液体的研究进展

:20079,:2007113(Y2006B29)33e2mail:[e-mail]333(250014),22P()P,P:O64514;O626123:A:10052281X(2008)07P821057207Imidazolium2BasedIonicLiquidsWangZhongni33WangJieyingSiYouhuaZhouWu(CollegeofChemistry,ChemicalEngineeringandMaterialsScience,ShandongNormalUniversity,Jinan250014,China)AbstractTheuniquephysicochemicalpropertiesofimidazolium2basedionicliquids(IBILs)haveattractedincreasinginterestsduetotheirpotentialapplicationsinvariousareas.Inthispaper,combiningwithourworks,recentprogressinsomephysicochemicalpropertiesofIBILshavebeenreviewedanddiscussed,includingthegas2liquidandliquid2liquidequilibriumofIBILs,thesurfactantbehaviourofIBILs,theaggregationsoftraditionalsurfactantinIBILs,aswellasthesupramolecularself2assembliesformedinsurfactantPIBILsPwater(oroil)ternarysystems.Suggestionsforfurtherstudieshavebeenproposedtoinvestigatetheself2assembliesformedinnon2traditionalsurfactantPIBILssystemsandtomakeclearthathowthestructuresofIBILsinfluencetheformationandpropertiesofsurfactantself2assemblies.Keywordsimidazolium2basedionicliquids(IBILs);solubilityequilibrium;supramolecularself2assemblies(ionicliquids,ILs),N2N,N2,X-,BF4-,PF6-,ROSO3-,TfO-(CF3SO3-),NfO-(C4F9SO3-),Tf2N-((CF3SO2)2N-)[1,2]ILs,,[3]N,N2(IBILs),ILs,IBILs,IBILsILs1207P820088PROGRESSINCHEMISTRYVol.20No.7P8Aug.,2008©1994-2008ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.(bmim)cationR1=CH3,R2=n2C4H912n2ethyl232methylimidazolium(emim)cationR1=CH3,R2=n2C2H512n2octyl232methylimidazolium(omim)cationR1=CH3,R2=n2C8H1712n2hexadecyl232methylimidazolium(hmim)cationR1=CH3,R2=n2C6H1312n2alkyl232methylimidazolium(Cnmim)cationR1=CH3,R2=n2CnH2n+1bis(trifluoromethylsulfonyl)imide(Tf2N,BMSI)anionX-=(CF3SO2)N-bis(trifluoroethylsulfonyl)imide(BETI)anionX-=(C2F5SO2)2N-hexafluorophosphate(PF6)anionX-=PF6-tetrafluoroborate(BF4)anionX-=BF4-1R1,R2;X-Fig.1Structureofimidazolium2basedionicliquids:R1andR2representthesubstituentsonimidazoliumcation,X-denotestheanionunit122,,,IBILs221.1IBILsILsILsCO2IBILsCO2+[bmim][PF6],CO2+[omim][PF6],CO2+[omim][BF4]CO2+[bmim][NO3][2,4,5]2004Ally[6],CO2ILs,Cardena[7],,CO2,PF6-BF4-Tf2N-,Costantini[8]CO2[emim][BF4],2,,,2,,CO2[emim][BF4]CO2IL,Langmuir((1))XCO2=aPb+P(1)Anthony[9]92330KCO2[emim][BF4][8]Langmuir((1)),a=017497MPa,b=51044MPaFig.2RelationshipbetweenpressureandthesolubilityofCO2in[emim][BF4][8].ThesolidlinecorrespondstocalculatedresultusingLangmuiradsorptionisotherm(eq1(1)):wherea=017497MPa,b=51044MPaCO2C2H4C2H6CH4ArO2COH2N2[bmim][PF6],CO2IL,;C2H4C2H6;ArO2,;COH2N2[bmim][PF6]Husson2Borg[10](1),,CO2[bmim][BF4]O2,,CO2,O2Anthony[9][bmim][PF6]850120©1994-2008ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.[bmim][BF4](C)(H)[10]Table1Solubility(C)andHenryslawcoefficient(H)ofCO2andO2in[bmim][BF4]asafunctionoftemperature[10]T(K)P(kPa)102C(molPL)H(MPa)CO2+[bmim][BF4]313.8918.401.446.8324.1219.061.347.5334.3819.701.278.1O2+[bmim][BF4]314.0919.880.2836.8324.1920.500.3332.6334.3121.110.4127.11.2IBILsILsPILsPILs,ILs2(LLE)ILsSelvan[11][emim][I3]PP2[emim][PF6][12][bmim][PF6][13][bmim][BF4][1416]2,[bmim][Tf2N][emim][Tf2N][17][emim][PF6][18][hmim][BF4][19,20],2,P(uppercriticalsolutiontemperature,UCST),UCST:(1);(2);(3)3IBILsPUCST:(1)IL,UCSTIL;(2)IL,UCST;(3),UCST:[PF6]-[BF4]-[Tf2N]-3UCST[2,17],[emim][Tf2N]+UCST80,[bmim][Tf2N]+UCST43,2;3IBILs+UCST[2]Fig.3TheUCSTvaluesasafunctionofthecarbonnumberinstraight2chainalcoholsforIBILsPalcoholsystems[2],P(,P)210,,IBILs,2.1IBILs12232(Cnmim)IBILs,2001,LawWatson[21][Cnmim][X](n=4,8,12;X=PF6-,BF4-,Cl-,Br-),,;;1(n)2004,Bowers[22](SANS),312232(Cnmim)ILs;2002,Firestone[23]X(SAXS)12232([C10mim][Br])2007,Iimori[24]2(infrared2visiblesumfrequencygeneration,SFG)95017P8©1994-2008ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.[Cnmim][BF4]P,ILsRivera2Rrbew[25]SFGbmim+Br-I-PF6-BF4-(CF3SO2)2N-SCN-CH3SO3-CH3SO4-(CN)2N-ILs,(FTIR)RamanDong[26](298K),3Cnmim+Xia[27]Winsor,22,,2(interfacebetweentwoimmiscibleelectrolytesolutions,ITIES)ITIES,1,22[28],,()ITIESCnmim+(n=6,8,10,12)[bis(perfluoromethylsulfonyl)imide,BMSI][bis(perfluoroethylsulfonyl)imide,BETI],2,,2ITIES2,(potentialofzerocharge,PZC)Fitchett[29][Cnmim][BMSI][Cnmim][BETI]IBILPIBILs,,2,;2,ITIES2PZCIL,PZC-161mV([C10mim][BMSI]P)-357mV([C6mim][BETI]P)IL,,(secondharmonicgeneration,SHG)2,ILPIBILPITIESSHG,2.2IBILs2003,Anderson[30](23)(Brij35),(SDS)[bmim][Cl][bmim][PF6],ILscmccmc122004FletcherPandey[31]Brij35,Brij700,Tween20TritonX2100[emim][Tf2N],CTAB,SDS[emim][Tf2N],[32][bmim][PF6]2007Seth[33]153(Coumarin153,C2153),C14E8C12E8,[bmim][BF4],[bmim][BF4]2C14E8[bmim][BF4]2C12E8:(1)C2153[bmim][BF4];(2),C12E8,,C2153C12E8,C12E8C14E822(PEO2PPO2PEO),,ILs,PEO2PPO2PEO,Zheng060120©1994-2008ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.[34](FTIR)(FF2TEM)(DLS)(NMR)[bmim][Br]PluronicP104(EO272PO612EO27)PEO2PPO2PEO,[bmim][Br]P104(CMT),[bmim][Br],P104CMT;[bmim][Br]11232molPL,CMT;[bmim][Br]11848molPL,