Assembly of TM−Containing Polyoxotungstates−Based on Metal−Organic frameworks with catalytic oxidation performances for various sulfides

Abstract

The catalytic selectivity oxidation of sulfides to sulfoxides is the central organic reaction for future sustainable development. Herein, two remarkable polyoxotungstates−based on metal−organic frameworks, [{Ag₆(ptz)₄}{PW₁₂O₄₀}]·0.5H₂O and [{Cu₃(ptz)₃}{PW₁₂O₄₀}]·4H₂O (ptz = 5−(4−pridyl)−1H−tetrazole), were deliberately designed and isolated. In compound 1, the {PW₁₂} polyoxoanions occupy the 1D big rectangular porous original from the 3D Ag−organic framework, constructing a fascinating 3D POMs−based 3D framework. Compound 2 exhibit a glamorous 2D sheet structure comprise of bicapped anions {PW₁₂} and 1D Cu−organic chains. Additionally, two compounds can be severed as the high−efficiency heterogeneous catalysts for the selective oxidation of sulfides. In particularly, compound 1 exhibits satisfying catalytic performance in the oxidation of MPS (conv. 97.5 %; sele. 99 %). Notedly, after five cyclic catalytic reaction, compound 1 maintains excellent catalytic performance and structural stability.