期刊
JOURNAL OF MATERIALS CHEMISTRY
卷 19, 期 48, 页码 9153-9162出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/b915559g
关键词
-
资金
- University of Padova
We report on the synthesis and characterisation of novel ionic liquid crystals and ionic liquids based on asymmetric viologen salts of bis(trifluoromethanesulfonyl)amide (Tf2N-). The thermotropic behaviour of the salts has been thoroughly characterized by DSC, X-ray diffraction and polarized light optical microscopy. The occurrence of smectic mesophases and the temperature range over which they are stable has been discussed as a result of the asymmetry of the viologen dications. Strongly asymmetric systems, not showing mesomorphism, have a rather low melting point (just beyond 40 degrees C) while slightly asymmetric samples exhibit a smectic phase with a wide range of stability, from about 0 degrees C up to above 140 degrees C, thus increasing the range of stability of the mesophase observed for the symmetric compounds. Finally, we report on the lyotropic behaviour in non-polar solvents, such as benzene, where liquid clathrates have been found.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据