Abstract
Three amphiphilic sulphonato-salen–chromium(III) complexes immobilized on MCM-41 were prepared for the solvent-free selective oxidation of benzyl alcohol with 30 % hydrogen peroxide. The immobilized complexes were effective catalysts and exhibited much higher catalytic performance than their corresponding homogeneous analogues and immobilized lipophilic complexes. Under the optimum reaction conditions, benzyl alcohol conversion could reach 60.3 % with 100 % of the selectivity to benzaldehyde. In addition, the catalysts could be recycled at least five times.
Graphical Abstract
The immobilized amphiphilic sulphonato-salen–chromium(III) complexes were effective in the selective oxidation of benzyl alcohol due to the increased accessibility of oxidant to catalyst and reactant. The best benzyl alcohol conversion reached 60.3% with 100% of the selectivity to benzaldehyde.
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Acknowledgments
The authors acknowledge the financial supports from the National Natural Science Foundation of China (21003073, 21203093), the Qing Lan Project of Jiangsu Province, the Collegiate Natural Science Fund of Jiangsu Province (12KJD150007), and the Undergraduate Scientific and Technological Innovation Project of Nanjing Institute of Technology (N20131202).
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Wu, G., Wang, X., Liu, X. et al. Environmental Benign Oxidation of Benzyl Alcohol Catalyzed by Sulphonato-Salphen–Chromium(III) Complexes Immobilized on MCM-41. Catal Lett 144, 364–371 (2014). https://doi.org/10.1007/s10562-013-1102-7
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DOI: https://doi.org/10.1007/s10562-013-1102-7