Photochemical Oxidation of MnSO4 in Dimethyl Sulfoxide in the Presence of Water
- Authors: Tsaplev Y.B.1
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Affiliations:
- Emanuel Institute of Biochemical Physics
- Issue: Vol 92, No 11 (2018)
- Pages: 2330-2336
- Section: Photochemistry and Magnetochemistry
- URL: https://journals.rcsi.science/0036-0244/article/view/170224
- DOI: https://doi.org/10.1134/S0036024418110432
- ID: 170224
Cite item
Abstract
A solution of MnSO4 in dimethyl sulfoxide is obtained at a water concentration of 0.2–0.6 M. Most of the water molecules in this solution belong to the hydration shell of [Mn(OH)(H2O)5]+ · \({\text{HSO}}_{4}^{ - }\)(H2O)x ion pairs. The photooxidation of manganese to MnIII in the presence of an electron acceptor (oxygen or nitro blue tetrazolium) in the solution proceeds when the solution is irradiated with light at the wavelength corresponding to the absorption bands of MnII ions. The solution and its photochemical conversions are studied by means of spectroscopy, chemiluminescence, and conductometry. The photolysate is found to contain neither hydrogen peroxide nor free superoxide radical anions. The quantum yield for the photochemical generation of MnIII is determined for the light absorbed by MnII at the 6A1 → 4E, 4A1 band: 0.01 ± 0.002 mol/Einstein.
About the authors
Yu. B. Tsaplev
Emanuel Institute of Biochemical Physics
Author for correspondence.
Email: tsap_04@mail.ru
Russian Federation, Moscow, 119334