Zhang Yongya, Wang Binshen, Elageed Elnazeer H M, Qin Li, Ni Bing, Liu Xiuli, Gao Guohua
Shanghai Key Laboratory of Green Chemistry and Chemical Processes, Department of Chemistry, East China Normal University, North Zhongshan Road 3663, Shanghai 200062, China.
School of Life Sciences, East China Normal University, Shanghai 200062, China.
ACS Macro Lett. 2016 Apr 19;5(4):435-438. doi: 10.1021/acsmacrolett.6b00178. Epub 2016 Mar 10.
Homogeneous catalysts generally show higher catalytic activities, while heterogeneous catalysts are more easily separated from products. To combine the advantages of heterogeneous and homogeneous catalysts has been of great interest for many years. Here, we report a kind of facilely prepared cross-linked poly(ionic liquid)s (PILs) with swelling property to increase catalytic activities of heterogeneous catalysts. The swelling ability of PILs was greatly affected by cross-linking density and chain length of substituents on imidazolium, and the unique swelling property prompted the nonporous PILs to contact with substrates sufficiently, enhancing their catalytic activities similar to homogeneous ionic liquid monomers.
均相催化剂通常表现出较高的催化活性，而异相催化剂则更容易从产物中分离出来。多年来，将均相催化剂和异相催化剂的优点结合起来一直备受关注。在此，我们报道了一种易于制备的具有溶胀性能的交联聚离子液体（PILs），以提高异相催化剂的催化活性。PILs的溶胀能力受到咪唑鎓上取代基的交联密度和链长的极大影响，这种独特的溶胀性能促使无孔的PILs与底物充分接触，增强了它们类似于均相离子液体单体的催化活性。
