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Synthesis, structural characterisation, and catalytic activity of Mn(II)– protected amino acid complexes covalently immobilised on chloropropylated silica gel

Csendes, Z. and Varga, G. and Nagy, N. V. and Bajnóczi, É. G. and Sipiczki, M. and Carlson, S. and Canton, S. E. and Metzinger, A. and Galbács, G. and Sipos, P. and Pálinkó, I. (2015) Synthesis, structural characterisation, and catalytic activity of Mn(II)– protected amino acid complexes covalently immobilised on chloropropylated silica gel. Catalysis Today, 241. pp. 264-269. ISSN 0920-5861

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Abstract

In this work the syntheses, structure, superoxide dismutase (SOD) activity and the catalytic use in the oxidative transformations of cyclohexene of covalently grafted Mn(II)-complexes formed with various C-protected amino acid (L-histidine, L-cysteine and L-cystine) ligands is presented. The structural features of the surface complexes were studied by EPR, X-ray absorption, and mid/far IR spectroscopies. The superoxide dismutase activities of the materials were determined in a biochemical test reaction. The obtained materials were used as catalysts for the oxidation of cyclohexene with peracetic acid in acetone. Covalent grafting and building the complex onto the surface of the chloropropylated silica gel were successful in all cases. It was found that in many instances the structures obtained and the coordinating groups substantially varied upon changing the conditions of the syntheses. All the covalently immobilised Mn(II)–complexes displayed superoxide dismutase activity and could catalyse the oxidation of cyclohexene.

Item Type: Article
Subjects: Q Science / természettudomány > QD Chemistry / kémia
Q Science / természettudomány > QD Chemistry / kémia > QD03 Inorganic chemistry / szervetlen kémia
Q Science / természettudomány > QD Chemistry / kémia > QD04 Organic chemistry / szerves kémia
Depositing User: Dr. xAranka xPilbáth
Date Deposited: 08 Dec 2014 10:01
Last Modified: 08 Dec 2014 15:57
URI: http://real.mtak.hu/id/eprint/18933

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