Use of immobilized transition metal complexes as recyclable catalysts for oxidation reactions with hydrogen peroxide as oxidant |
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Authors: | Sk Manirul Islam Manir Mobarok Paramita Mondal Anupam Singha Roy Noor Salam Dildar Hossain Sanchita Mondal |
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Institution: | (1) Department of Chemistry, University of Kalyani, Kalyani, Nadia, WB, 741235, India |
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Abstract: | A tetradentate Schiff base (teta), obtained from triethylenetetramine and salicylaldehyde, has been covalently bonded to divinylbenzene
cross-linked chloromethylated polystyrene. This chelating ligand, abbreviated as PS-teta (PS = polymeric support), reacts
with metal chlorides (Cu2+, Co2+, and Ni2+) in methanol to give polymer-bound transition metal complexes, PS-Cu(II)teta/(Cat-1), PS-Ni(II)teta/(Cat-2), and PS-Co(II)teta/(Cat-3),
formation of which has been established by various physiochemical methods and spectroscopic techniques. The catalytic potential
of these materials has been tested for the oxidation of various alkenes, alkanes, alcohols, and thioethers in the presence
of 30% H2O2 as an oxidant. At the same time, these catalysts are very stable and could be reused in oxidation reactions for more than
five times without noticeable loss of their catalytic activity. |
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