文献类型：期刊文献

英文题名：Temperature-Dependent Immobilization of a Tungsten Peroxo Complex That Catalyzes the Hydroxymethoxylation of Olefins

作者：Chen, Jizhong[1];Hua, Li[1];Chen, Chen[1];Guo, Li[1];Zhang, Ran[1];Chen, Angjun[1];Xiu, Yuhe[1];Liu, Xuerui[1];Hou, Zhenshan[1]

机构：[1]E China Univ Sci & Technol, Res Inst Ind Catalysis, Key Lab Adv Mat, Shanghai 200237, Peoples R China

年份：2015

卷号：80

期号：6

起止页码：1029

外文期刊名：CHEMPLUSCHEM

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000355263100015)】；

基金：We are grateful for support from the National Natural Science Foundation of China (21373082), Innovation Program of Shanghai Municipal Education Commission (15ZZ031), and the Fundamental Research Funds for the Central Universities.

语种：英文

外文关键词：-alkoxy alcohols; functionalized silica; hydrogen bonds; heterogeneous catalysis; tungsten peroxo complexes

摘要：A tungsten peroxo complex stabilized by the bidentate picolinato ligand has been synthesized and then immobilized successfully on imidazole-functionalized silica. The immobilized tungsten-based catalyst was employed as an efficient catalyst for the one-pot synthesis of -alkoxy alcohols from olefins and methanol with H2O2. Regarding the catalyst evaluation and the results of characterization by the various methods, it was demonstrated that the immobilization of tungsten peroxo complex was highly temperature-dependent. The tungsten peroxo complex can dissociate and diffuse into the liquid phase at reaction temperature, resulting in a homogeneous reaction. Nevertheless, the catalytically active species was anchored on the imidazole-functionalized silica by hydrogen bonding as the temperature was lowered to 0 degrees C after the reaction, which thus offered a highly effective approach for recycling the catalyst for consecutive cycles. In addition, various olefins can be converted to the corresponding -alkoxy alcohols with good conversion and selectivity under relative mild conditions by H2O2.