文献类型：期刊文献

英文题名：Protic ionic liquids with fluorous anions: physicochemical properties and self-assembly nanostructure

作者：Shen, Yan[1,2];Kennedy, Danielle F.[1];Greaves, Tamar L.[1];Weerawardena, Asoka[1];Mulder, Roger J.[1];Kirby, Nigel[3];Song, Gonghua[2];Drummond, Calum J.[1]

机构：[1]CSIRO Mat Sci & Engn CMSE, Clayton, Vic 3169, Australia;[2]E China Univ Sci & Technol, Shanghai Key Lab Chem Biol, Sch Pharm, Shanghai 200237, Peoples R China;[3]Australian Synchrotron, Clayton, Vic 3168, Australia

年份：2012

卷号：14

期号：22

起止页码：7981

外文期刊名：PHYSICAL CHEMISTRY CHEMICAL PHYSICS

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000304102200011)】；

基金：YS acknowledges the China Scholarship Council as the recipient of a visiting scholarship, and CSIRO for hosting her visit. C.J.D was the recipient of an Australian Research Council (ARC) Federation Fellowship. D.F.K. and T.L.G. were recipients of CSIRO post-doctoral fellowships. The authors would like to thank Thomas Ruether, CSIRO Division of Energy Technology, for the use of the conductivity rig. Portions of this work were undertaken on the SAXS/WAXS beamline at the Australian Synchrotron, Clayton.

语种：英文

摘要：A series of 11 new protic ionic liquids with fluorous anions (FPILs) have been identified and their self-assembled nanostructure, thermal phase transitions and physicochemical properties were investigated. To the best of our knowledge this is the first time that fluorocarbon domains have been reported in PILs. The FPILs were prepared from a range of hydrocarbon alkyl and heterocyclic amine cations in combination with the perfluorinated anions heptafluorobutyrate and pentadecafluorooctanoate. The nanostructure of the FPILs was established by using small- and wide-angle X-ray scattering (SAXS and WAXS). In the liquid state many of the FPILs showed an intermediate range order, or self-assembled nanostructure, resulting from segregation of the polar and nonpolar hydrocarbon and fluorocarbon domains of the ionic liquid. In addition, the physicochemical properties of the FPILs were determined including the melting point (T-m), glass transition (T-g), devitrification temperature (T-c), thermal stability and the density rho, viscosity eta, air/liquid surface tension gamma(LV), refractive index n(D), and ionic conductivity kappa. The FPILs were mostly solids at room temperature, however two examples 2-.pyrrolidinonium heptafluorobutyrate (PyrroBF) and pyrrolidinium heptafluorobutyrate (PyrrBF) were liquids at room temperature and all of the FPILs melted below 80 degrees C. Four of the FPILs exhibited a glass transition. The two liquids at room temperature, PyrroBF and PyrrBF, had a similar density, surface tension and refractive index but their viscosity and ionic conductivity were very different due to dissimilar self-assembled nanostructure.