Solvent-free oxidation of alcohols by hydrogen peroxide over chromium Schiff base complexes immobilized on MCM-41 |
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Authors: | Xiaoli Wang Gongde Wu Wei Wei Yuhan Sun |
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Institution: | (1) Department of Environment and Technology, Nanjing Institute of Technology, Nanjing, 211167, People’s Republic of China;(2) State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan, 030001, People’s Republic of China |
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Abstract: | A series of chromium(III) Schiff base complexes immobilized on MCM-41 were prepared and characterized by various physicochemical
and spectroscopic methods. The complexes were used for the selective oxidation of alcohols by 30% hydrogen peroxide without
any organic solvent, phase transfer catalyst or additive. The immobilized complexes proved to be effective catalysts and generally
exhibited much higher catalytic performance than their corresponding homogeneous analogs. The catalytic performance of the
immobilized complexes was also found to be closely related to the Schiff base ligands used. Under the optimal reaction conditions,
secondary alcohols, cyclic alcohols and benzyl alcohol were prevailingly oxidized to their corresponding ketones or aldehydes. |
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