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@ARTICLE{Mourzina:888497,
author = {Mourzina, Youlia and Offenhäusser, Andreas},
title = {{E}lectrochemical properties and biomimetic activity of
water-soluble meso-substituted {M}n({III}) porphyrin
complexes in the electrocatalytic reduction of hydrogen
peroxide},
journal = {Journal of electroanalytical chemistry},
volume = {866},
issn = {1572-6657},
address = {New York, NY [u.a.]},
publisher = {Elsevier},
reportid = {FZJ-2020-04961},
pages = {114159 -},
year = {2020},
abstract = {The aim of this study was to investigate biomimetic
activity of water-soluble manganese porphyrin complexes with
a series of meso-substituents of the porphyrin macrocycle in
the electrocatalytic reduction of hydrogen peroxide in
aqueous solutions and to obtain information on possible
intermediates, processes, and mechanisms. Mn porphyrins were
compared in the process of the electrocatalytic reduction of
hydrogen peroxide at pH 4, 7.4, and 10 in the deoxygenated
solutions and in the presence of oxygen. The highest
sensitivity, defined as the reduction current increase in
relation to the concentration of hydrogen peroxide, was
found in the case of Mn(III) meso-tetra(N-methyl-4-pyridyl)
porphyrin, MnTMPyP, in alkaline 2.9·10−2 A M−1 and
acidic 1.6·10−2 A M−1 solutions in the presence of
oxygen. The reduction currents at pH 7.4, 10, and 4 in the
presence of H2O2 were about 4, 7, and 12 times higher,
respectively, in the solutions with the MnTMPyP complex than
those at a GCE without a porphyrin complex in the solution.
The electrocatalytic reduction of hydrogen peroxide occurs
in parallel with an oxidative degradation of the porphyrin
catalyst depending on the conditions of the experiment and
was most significant in the presence of oxygen. The effect
of the functional substituents at the meso-positions of a
porphyrin ligand on the electrocatalytic activity of the
water-soluble Mn(III) porphyrins complexes is discussed and
reaction mechanisms are proposed.},
cin = {IBI-3},
ddc = {620},
cid = {I:(DE-Juel1)IBI-3-20200312},
pnm = {523 - Controlling Configuration-Based Phenomena (POF3-523)},
pid = {G:(DE-HGF)POF3-523},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000534394000006},
doi = {10.1016/j.jelechem.2020.114159},
url = {https://juser.fz-juelich.de/record/888497},
}