【作者】 汪杰； 郑卓群； 吴瑛； 周小平； 吴廷华；

【Author】 Jie Wang, Zhuoqun Zheng, Ying Wu, Xiaoping Zhou, Tinghua Wu Institute of Physical Chemistry, Zhejiang Key Laboratory for Reactive Chemistry on Solid Surfaces, Zhejiang Normal University , Jinhua, 321004, China

【机构】 浙江师范大学物理化学所,浙江省固体表面反应化学重点实验室；

【Abstract】 Halide-free ionic liquids containing different ainons can be prepared by the reaction of protonated imidazolium salts with dimethyl carbonate (DMC). Protonated imidazolium salts can be quantitative synthesized from 1-alkylimidazole and acids by neutralization reaction. The ionic liquids prepared were analyzed on a NMR spectrometer. The presence of halide contamination in ionic liquids will drastically change the physical properties, and may result in catalyst poisoning and deactivation if used as solvents for transition metal catalyzed reactions. But the halide are always contained in ionic liquids prepared by the materthesis. Now different ionic liquids with pure anions (such as Cl-,Br-,BF4-,PF6-,NO3-,OAc-,SO4-, PO43-,C2O4- and etc) can be easily prepared under mild conditions with no contaminations. Also DMC is a good eco-friendly alkylating reagent alternative to both methyl halide and dimethyl sulfate, and its by-products are only methanol and carbon dioxide.更多还原