Cobalt(II), Copper(II) and Zinc (II) complexes of 2-methyl benzimidazole encapsulated in zeolite as catalysts for the hydroxylation of phenol

被引：0
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作者：
Bhadravathi Puttappa Nethravathi
Kadidal Nagappa Mahendra
机构：
[1] Bangalore University,Department of Studies in Chemistry, Central College Campus
来源：
Journal of Porous Materials | 2010年 / 17卷
关键词：
Encapsulation; Zeolite-Y; ZSM-5; Hydrogen peroxide decomposition; Oxidation of phenol; Catechol and hydroquinone formation;
D O I：
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学科分类号：
摘要：
Cobalt(II), Copper(II) and Zinc (II) complexes of 2-methylbenzimidazole (Mebzlh) encapsulated in the super cages of zeolite-Y and ZSM-5 have been synthesized by flexible ligand method and characterized by various physico-chemical measurements. The catalytic activity of encapsulated complexes was investigated for the decomposition of H2O2 and for the hydroxylation of phenol using H2O2 as an oxidant. The hydroxylation of phenol yielded catechol and hydroquinone as the major products. All catalysts show good selectivity for diphenol products. The results showed that conversion of phenol varies in the order [Cu(Mebzlh)]-Y > [Cu(Mebzlh)]-ZSM-5 > [Zn(Mebzlh)]-Y > [Co(Mebzlh)]-Y > [Zn(Mebzlh)]-ZSM-5 > [Co(Mebzlh)]-ZSM-5 after 6 h of reaction time.
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页码：107 / 113
页数：6
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