Abstract
Spectral properties and chemical stability of Mn(III), Mn(IV), Fe(III), Fe(IV), and Cu(III) complexes of β-octabromotriphenylcorrole [(β-Br)8(ms-Ph)3Cor], synthesized from β-unsubstituted compounds by their reaction with molecular bromine, were studied. Cyclic voltammetry, electron microscopy, and X-ray spectral microanalysis were used to obtain electrochemical characteristics of metal corroles M(β-Br)8(ms-Ph)3Cor and gain insight into the surface texture of active catalysts on the basis of metal corroles. The electron-acceptor β-bromine substitution in the MCor macrocycle shifts the equilibrium in electron-donor solvents to lower oxidation states of the metals and also stabilizes manganese and destabilizes copper complexes in the protondonor medium HOAc-H2SO4. The electrocatalytic activity of the complexes in the reduction of molecular oxygen depends on the nature of the ligand and increases in the order Mn ≤ Cu ≪ Fe in the case of β-octabrominated macrocycles. The character of distribution of active centers on the surface of the catalysts was established for the first time.
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Original Russian Text © N.M. Berezina, Vu Thi Thao, D.R. Karimov, R.S. Kumeev, A.V. Kustov, M.I. Bazanov, D.B. Berezin, 2014, published in Zhurnal Obshchei Khimii, 2014, Vol. 84, No. 4, pp. 661–669.
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Berezina, N.M., Thao, V.T., Karimov, D.R. et al. synthesis and properties of β-brominated metal complexes of meso-triphenylcorrole. Russ J Gen Chem 84, 737–744 (2014). https://doi.org/10.1134/S1070363214040239
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DOI: https://doi.org/10.1134/S1070363214040239