Polymer-anchored peroxo compounds of molybdenum and tungsten as efficient and versatile catalysts for mild oxidative bromination

被引：40

作者：

Boruah, Jeena Jyoti ^{[1
]}

Das, Siva Prasad ^{[1
]}

Borah, Rupam ^{[1
]}

Gogoi, Sandhya Rani ^{[1
]}

Islam, Nashreen S. ^{[1
]}

机构：

[1] Tezpur Univ, Dept Chem Sci, Tezpur 784028, Assam, India

来源：

POLYHEDRON | 2013年 / 52卷

关键词：

Polymer immobilized peroxometallates; Molybdenum(VI) catalyst; Tungsten(VI) catalyst; Peroxidative bromination; Bromoperoxidase activity; Functional mimic; LAYERED DOUBLE HYDROXIDES; ALKALINE-PHOSPHATASE ACTIVITY; TRANSITION-METAL-COMPLEXES; HYDROGEN-PEROXIDE; VANADIUM-BROMOPEROXIDASE; AQUEOUS-SOLUTION; PEROXOVANADIUM(V) COMPLEXES; PEROXOTUNGSTEN COMPLEXES; N-BROMOSUCCINIMIDE; BETA-BROMOSTYRENES;

D O I：

10.1016/j.poly.2012.09.036

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

A polymer supported perozomolybdate(VI) compound of the type [MoO2(O-2)(CN)(2)]-PAN [PAN = poly(acrylonitrile)] (PANMo) was obtained by reacting H2MoO4 with 30% H2O2 and the macromolecular ligand, PAN at near neutral pH. The macrocomplex has been characterized by elemental analysis (CHN and EDX analysis), spectral (IR, UV-Vis and C-13 NMR, Mo-95 NMR), thermal (TGA-DTG) as well as SEM studies. The catalytic activity of PANMo and its previously reported tungsten containing analog PANW, in oxidative bromination of organic substrates has been explored. The supported complexes could serve as efficient heterogeneous catalysts for the oxidative bromination of a variety of structurally diverse aromatic compounds, with H2O2 as terminal oxidant, to afford bromo organics in impressive yields under environmentally clean conditions. The catalysts afforded regeneration and could be reused for a minimum of six reaction cycles. (C) 2012 Elsevier Ltd. All rights reserved.

引用

页码：246 / 254

页数：9

共 104 条

[1] Eco-friendly and versatile brominating reagent prepared from a liquid bromine precursor [J].