A chitosan supported peroxidovanadium(V) complex: Synthesis, characterization and application as an eco-compatible heterogeneous catalyst for selective sulfoxidation in water

被引：11

作者：

Saikia, Gangutri ^{[1
]}

Ahmed, Kabirun ^{[1
]}

Gogoi, Sandhya Rani ^{[1
]}

Sharma, Mitu ^{[1
]}

Talukdar, Hiya ^{[1
]}

Islam, Nashreen S. ^{[1
]}

机构：

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

来源：

POLYHEDRON | 2019年 / 159卷

关键词：

Peroxidovanadium(V) complex; Chitosan immobilized vanadium(V); Heterogeneous catalysis; Green oxidation catalyst; Aqueous sulfide oxidation; 30-PERCENT HYDROGEN-PEROXIDE; MAGNETIC FE3O4 NANOPARTICLES; CROSS-LINKED CHITOSANS; HEAVY-METAL COMPLEXES; BIOGENIC CO-LIGANDS; ONE-POT SYNTHESIS; ORGANIC-REACTIONS; GREEN OXIDATION; MILD OXIDATION; EFFICIENT CATALYST;

D O I：

10.1016/j.poly.2018.11.028

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Anchoring of peroxidovanadium(V) (pV) species to chitosan, a natural chelating polymer, afforded a new and structurally defined immobilized complex, VO(O-2)(2)(NH2)-chitosan (ChpV) which was comprehensively characterized by elemental analysis (CHN, ICP-OES, energy dispersive X-ray spectroscopy), spectral studies (FT-IR, Raman, C-13 NMR, diffuse reflectance UV-Vis and XPS), SEM, XRD, Brunauer-Emmett-Teller (BET) and thermogravimetric analysis (TGA). Apart from being thermally stable, the compound is water-tolerant and non-hygroscopic. The compound effectively facilitated chemoselective oxidation of thioethers with H2O2 in aqueous medium to the respective high purity sulfoxide, in impressive yield (TOF 5628 h(-1)) and with high H2O2 efficiency, under mild reaction condition. In addition to water, the heterogeneous catalyst is highly compatible in a variety of organic solvents and is recyclable for several catalytic cycles without significant loss in selectivity. The catalytic procedure is amenable to ready scalability and is free from halogen, co-catalyst and acidic or any other hazardous additive. (C) 2018 Elsevier Ltd. All rights reserved.

引用

页码：192 / 205

页数：14

共 38 条

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