Catalytic Epoxidation of Olefins with Graphene Oxide Supported Copper (Salen) Complex

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• 作者：Qingshan Zhao ; Chan Bai ; Wenfeng Zhang ; Yang Li ; Guoliang Zhang ; Fengbao Zhang ; Xiaobin Fan
• 刊名：Industrial & Engineering Chemistry Research
• 出版年：2014
• 出版时间：March 19, 2014
• 年：2014
• 卷：53
• 期：11
• 页码：4232-4238
• 全文大小：434K
• 年卷期：v.53,no.11(March 19, 2014)
• ISSN：1520-5045

文摘

Immobilization of metal complexes on solid supports is an efficient approach to remedy the drawbacks of homogeneous catalysis. In this study, an in situ strategy of synthesis and immobilization of a copper (salen) complex onto graphene oxide (GO) support has been developed. To provide the salen ligands, GO was covalently modified with an aminosilane, followed by condensation with salicylaldehyde. The copper (salen) complex was subsequently synthesized and simultaneously immobilized onto the GO surface with a designed tetrahedral chelate structure. The immobilized copper (salen) complex [Cu(salen)鈥?i>f鈥揋O] kept the two-dimensional sheetlike character of GO and was demonstrated to be highly effective for the epoxidation of olefins. It could be readily reused for successive twelve times without discernible activity and selectivity deterioration, which displays potential for practical applications.