LI Xue-li1,2, LI Zuo-peng1, LIU Shi-min1, Zhang Qing-hua1, Zhang Shi-guo1, DENG You-quan*,1
(1 Centre for Green Chemistry and Catalysis, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou, 730000; 2 Graduate University of Chinese Academy of Sciences, Beijing 100039, China)
Abstract: Ten halogen-free ionic liquids (ILs) based on 1,3-dialkylimidazolium cations and methanesulfonate [MS]- or p-toluenesulfonate[TS]- anions were synthesized via one-step reaction, and their physicochemical properties such asaggregation behavior, surface property, thermal property, density, viscosity, refractive index and electrochemical properties have comparatively been studied. The results showed that ion cluster behavior was observed for the methanesulfonate anion ILs. The emission spectra of neat [BEim]MS only gave relatively weak fluorescence, whereas [BEim]TS exhibited strong emission behavior under same conditions. Ten studied ILs displayed five different phase behaviors, of which [C12Mim]MS exhibited a liquid crystal behavior. The [TS]- based ILs showed high refractive indices of > 1.51.
Key words: sulfonate, ionic liquids, halogen-free, synthesis, physicochemical property.
E-mail: ydeng@licp.cas.cn
Journal of Molecular Catalysis, Vol. 24, Issue 6, 2010, 483~491.
