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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.; Varga, G.; Nagy, N. V.; Bajnoczi, E. G.; Sipiczki, M.; Carlson, Stefan LU ; Canton, Sophie LU ; Metzinger, A.; Galbacs, G. and Sipos, P., et al. (2015) In Catalysis Today 241. p.264-269
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 are 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... (More)
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 are 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. (C) 2014 Elsevier B.V. All rights reserved. (Less)
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subject
keywords
Biomimetic catalysis, Silica immobilised Mn(II)-complexes, EPR, XAS, Superoxide dismutase activity, Cyclohexene oxidation
in
Catalysis Today
volume
241
pages
264 - 269
publisher
Elsevier
external identifiers
  • wos:000345994300015
  • scopus:84949116697
ISSN
0920-5861
DOI
10.1016/j.cattod.2013.11.066
language
English
LU publication?
yes
id
85d9c9bc-380f-4a70-974b-a89a834ea1c8 (old id 4950658)
date added to LUP
2015-01-28 14:14:46
date last changed
2017-01-01 06:11:20
@article{85d9c9bc-380f-4a70-974b-a89a834ea1c8,
  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 are 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. (C) 2014 Elsevier B.V. All rights reserved.},
  author       = {Csendes, Z. and Varga, G. and Nagy, N. V. and Bajnoczi, E. G. and Sipiczki, M. and Carlson, Stefan and Canton, Sophie and Metzinger, A. and Galbacs, G. and Sipos, P. and Palinko, I.},
  issn         = {0920-5861},
  keyword      = {Biomimetic catalysis,Silica immobilised Mn(II)-complexes,EPR,XAS,Superoxide dismutase activity,Cyclohexene oxidation},
  language     = {eng},
  pages        = {264--269},
  publisher    = {Elsevier},
  series       = {Catalysis Today},
  title        = {Synthesis, structural characterisation, and catalytic activity of Mn(II)-protected amino acid complexes covalently immobilised on chloropropylated silica gel},
  url          = {http://dx.doi.org/10.1016/j.cattod.2013.11.066},
  volume       = {241},
  year         = {2015},
}