Selective photooxidation of diols with silica bound W10O324-

被引：48

作者：

Maldotti, A. ^{[1
]}

Molinari, A. ^{[1
]}

Bigi, F. ^{[2
]}

机构：

[1] Univ Ferrara, Dipartmento Chim, I-44100 Ferrara, Italy

[2] Univ Parma, Dipartimento Chim Organ & Ind, I-43100 Parma, Italy

来源：

JOURNAL OF CATALYSIS | 2008年 / 253卷 / 02期

关键词：

heterogeneous photocatalysis; polyoxotungstates; oxidative catalysis; alcohol oxidation;

D O I：

10.1016/j.jcat.2007.11.008

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The decatungstate anion W10O324- has been heterogenized on silica previously functionalized with different ammonium cations covalently bound to the surface of the solid support. These materials are investigated as photocatalysts for the oxygen-assisted oxidation of 1,3-butanediol and 1.4-pentanediol. Product distribution and adsorption experiments indicate that the polarity of the environment surrounding the photoactive anion plays a crucial role in controlling the adsorption of diols on the surface and, consequently, their reaction with the photoexcited decatungstate. Proper reaction conditions are found for obtaining more than 90% of 4-hydroxy-2-butanone from 1,3-butanediol and for stopping the oxidation of 1,4-pentanediol to 4-hydroxypentanal with good yield. The employed photocatalysts present a very good stability in repeated experiments. (c) 2007 Elsevier Inc. All rights reserved.

引用

页码：312 / 317

页数：6

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