Synthesis, catalytic oxidation and oxidative bromination reaction of a reusable polymer anchored oxovanadium(IV) complex

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• 作者：Sk. Manirul Islamp> ; p>p>manir65@rediffmail.comp> ; Anupam Singha Roy ; Paramita Mondal ; Noor Salam
• 关键词：Polymer anchored ; Oxovanadium(IV) complex ; Oxidation ; Oxidative bromination ; Aqueous medium ; H2O2
• 刊名：Journal of Molecular Catalysis A ; Chemical
• 出版年：2012
• 期刊代码：57_13811169
• 类别：ch
• 出版时间：June, 2012
• 卷：358
• 期：Complete
• 页码：38-48
• 文件大小：900 K

摘要

Polymer anchored oxovanadium catalyst was synthesized and characterized. The solid catalyst was characterized by Fourier transform infrared spectroscopy (FT-IR), UV-vis diffuse reflectance spectroscopy (DRS), thermogravimetric analysis (TGA) and scanning electron microscope (SEM). Its catalytic activity was evaluated for the oxidation of various alkenes, sulfides and aromatic alcohols with 30%Hb>2b>Ob>2b> under mild reaction conditions. This catalyst was also effective for the oxidative bromination reaction of organic substrates with 80-100%selectivity of mono substituted products with Hb>2b>Ob>2b>/KBr at room temperature. The above reactions require minimum amount of Hb>2b>Ob>2b>, short time period and most importantly all the above reactions occur in aqueous medium. The developed catalyst can be facilely recovered and reused six times without significant decrease in activity and selectivity. This result confirms that the polymer anchored complex was not leached during the reaction, suggesting the true heterogeneous nature of the catalyst.