Novel mesoporous polyoxometalate hybrid catalysts for heterogeneous oxidation of thioethers

作者：Karimi Z; Mahjoub A R^*

来源：Catalysis Communications, 2011, 12(11): 984-988.

DOI：10.1016/j.catcom.2011.03.015

• Mesoporous silica
• Functionalized
• Preyssler
• Dawson
• Heterogeneous oxidation catalyst
• Thioethers

K(6)P(2)W(18)O(62) and K(14)[NaP(5)W(30)O(110)] polyoxometalate salts are synthesized and immobilized within MCM-48, SBA-3, SBA-15 and NH(3)(+) functionalized mesoporous silicas. The newly designed hybrid materials are studied as catalysts for oxidation of thioethers. Preyssler complex is found to be a more active catalyst compared to its Dawson analog. Texture and chemical composition of the silica framework is shown to have indispensable effect on oxidation efficiency, stability, and reusability of catalysts. Catalysts with larger pores are proved to be more proper for the oxidation of relatively large thioethers and functionalization improves catalyst's properties.

• 出版日期2011-6-10