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Improved olefin epoxidation performance of a discrete bis(8-quinolinol)oxovanadium(IV) complex covalently attached on SBA-15 by a metal-template/metal-exchange method

Paper ID Volume ID Publish Year Pages File Format Full-Text
51040 46827 2010 4 PDF Available
Title
Improved olefin epoxidation performance of a discrete bis(8-quinolinol)oxovanadium(IV) complex covalently attached on SBA-15 by a metal-template/metal-exchange method
Abstract

A metal-template/metal-exchange method was used for the covalent attachment of a discrete bis(8-quinolinol)oxovanadium(IV) complex onto mesoporous silica SBA-15 to obtain a heterogeneous catalyst VOIVT. For comparison, its homogeneous counterpart VOIVN and the randomly ligand-grafted heterogeneous analogue VOIVG were also prepared. UV–vis spectra of the VOIV catalysts show VOIVT adopts a more solution-like bis(8-quinolinol) coordination environment than VOIVG. Correspondingly, olefin epoxidation with tert-butyl hydroperoxide shows VOIVT has improved reactivity, epoxide selectivity and recyclability than VOIVN or VOIVG. The homogeneity of the discrete bis(8-quinolinol)oxovanadium(IV) complex immobilized on SBA-15 should be responsible for the superior performances of the templated catalyst.

Keywords
Metal-template method; Olefin epoxidation; 8-quinolinol; Oxovanadium; SBA-15
First Page Preview
Improved olefin epoxidation performance of a discrete bis(8-quinolinol)oxovanadium(IV) complex covalently attached on SBA-15 by a metal-template/metal-exchange method
Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Communications - Volume 11, Issue 9, 30 April 2010, Pages 808–811
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis