一种水溶性且“自组装”的多金属氧酸盐，作为在水中用过氧化氢氧化醇类的可循环催化剂。

A water-soluble and "self-assembled" polyoxometalate as a recyclable catalyst for oxidation of alcohols in water with hydrogen peroxide.

作者信息

Sloboda-Rozner Dorit, Alsters Paul L, Neumann Ronny

机构信息

Department of Organic Chemistry, Weizmann Institute of Science, Rehovot, Israel, 76100.

出版信息

J Am Chem Soc. 2003 May 7;125(18):5280-1. doi: 10.1021/ja0344821.

DOI:10.1021/ja0344821

PMID:12720432

Abstract

We have demonstrated that a simply prepared water-soluble polyoxometalate, Na12[WZnZn2(H2O)2(ZnW9O34)2], synthesized from readily available zinc and tungsten salts in the presence of nitric acid, is an effective catalyst for selective alcohol oxidation with hydrogen peroxide in biphasic (water-alcohol) reaction media. Experiments have shown that the "self-assembled" catalyst in its mother liquor was as active as the isolated catalyst. The aqueous catalyst solution is easily separated from the water-insoluble products and can be recycled without loss in activity or selectivity.

摘要

我们已经证明，一种通过在硝酸存在下由易得的锌盐和钨盐简单制备的水溶性多金属氧酸盐Na12[WZnZn2(H2O)2(ZnW9O34)2]，在双相（水-醇）反应介质中是用过氧化氢进行选择性醇氧化的有效催化剂。实验表明，母液中的“自组装”催化剂与分离出后催化剂的活性相当。催化剂水溶液很容易与水不溶性产物分离，并且可以循环使用而不会损失活性或选择性。