A comparative study on Keggin and Wells-Dawson sandwich type polyoxometallates in the oxidation of alcohols with 30% hydrogen peroxide

作者：Farsani Mostafa Riahi; Jalilian Fariba; Yadollahi Bahram^*; Rudbari Hadi Amiri

来源：Polyhedron, 2014, 76: 102-107.

DOI：10.1016/j.poly.2014.03.060

• Sandwich type polyoxometallatates
• Catalysis
• Oxidation
• Alcohols
• Hydrogen peroxide

The tetra-n-butylammonium (TBA) salts of Keggin and Wells-Dawson sandwich type polyoxotungstates, [M-4(PW9O34)(2)](m-) and [M-4(P2W15O55)(2)](n-) (M = Mn2+, Fe3+, Co2+, Ni2+ and Zn2+), proved to be effective catalysts for the oxidation of benzylic alcohols to the corresponding aldehydes with 30% hydrogen peroxide in acetonitrile. The Wells-Dawson type polyoxometallates showed lower activity than the Keggin ones, and both the Zn substituted polyoxometallates depicted higher conversions. Oxidation of different benzylic alcohols with electron withdrawing and electron donating substituents gave high to excellent yields in the presence of Zn substituted POMs.

• 出版日期2014-7-7