离子液体1-乙基-3-甲基咪唑三氟甲基磺酸盐与水之间的氢键作用.pdf

《离子液体1-乙基-3-甲基咪唑三氟甲基磺酸盐与水之间的氢键作用.pdf》由会员上传分享，免费在线阅读，更多相关内容在行业资料-天天文库。

1、物理化学学~(WuliHuaxueXuebao)SeptemberActaP．一Chim．Sin．2014，30(9)，1605—16101605【Article】doi：10．3866／PKU．WHXB201407012www．whxb．pku．edu．cn离子液体1．乙基．3．甲基咪唑三氟甲基磺酸盐与水之间的氢键作用宋大勇1,2陈静’(中国科学院兰州化学物理研究所，羰基合成与选择氧化国家重点实验室，兰州730000；中国科学院大学，北京100049)摘要：通过衰减全反射#I#I'(ATR．IR)光谱、二维红外相关谱结合量子化学计算研究了1一乙基-3一甲基咪唑三氟甲基磺

2、酸盐([emiml[OTq)和水之间的氢键作用．结果表明，在[emim][OTq一水体系中，当水的浓度较低时(0．1

3、维红外相关谱中图分类号：0645Hydrogen-BondingInteractionsbetweenIonicLiquid1一Ethyl一3-methylimidazoliumTrifluoromethanesulfonateandWaterSONGDa-Yong’，CHENJing’，’fStateKeyLaboratoryforOxoSynthesisandSelectiveOxidation，LanzhouInstituteofChemicalPhysics,ChineseAcademyofSciences．Lanzhou73000~GansuProvince,R

4、．China；UniversityofChineseAcademyofSciences，Beo'inglO004E尼China)Abstract：Attenuatedtotalreflectanceinfrared(ATR-IR)speclroscopyItwo—dimensionaIcorrelationspectroscopy，andquantumchemicalcalculationswereusedtoelucidatethehydrogen-bondinginteractionsbetweenanionicliquid(IL)。namely1-ethyl-3-m

5、ethylimidazoliumtrifluoromethanesulfonate([emim][OTq)，andwateroverawideconcentrationrange．ItwasfoundthatwatermoleculesareisolatedfromeachotherandembeddedirltheILenvironmentatIOWwaterconcentrations(0．1

6、ds，withtwo【OTfl—anions．“【OTfl一⋯HOH⋯[O111’hydrogen-bondedcomplexesexistinthe[emim】【0Tf】一watersystem．Inthisconcentrationmnge，thehydrogen．bondinginteractionsitesbetweenthecationandwateriSthealkylC—HratherthanthearomaticC—H．Athigherwaterconcentrations，thewatermoleculesformhydrogenbondswithfhe

7、mselves，producingwaterclustersinthemixture．Thehydrogen-bondinginteractionsitebetweenthecationandwateriSthearomaticC—HratherthanthealkyIC—H．KeyWords：Ionicliquid；Hydrogenbondinginteraction；Attenuatedtotalreflectanceinfraredspectroscopy；Two-dimensionalcorrelationspectr