Раrаdохical Sесоndаrу Emissiоn Mаss Sресtrum оf thе Lеuсо Fоrm оf Mеthуlеnе Bluе
- Authors: Kosevich M.V.1, Boryak O.A.1, Shelkovsky V.S.1, Zobnina V.G.1, Orlov V.V.1
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Affiliations:
- Vеrkin Institutе fоr Lоw Tеmреrаturе Рhуsiсs аnd Еnginееring, Nаtiоnаl Асаdеmу оf Sсiеnсеs оf Ukrаinе
- Issue: Vol 73, No 14 (2018)
- Pages: 1327-1333
- Section: Articles
- URL: https://journals.rcsi.science/1061-9348/article/view/182922
- DOI: https://doi.org/10.1134/S1061934818140058
- ID: 182922
Cite item
Abstract
A paradoxical relation between the secondary emission mass spectra of Methylene Blue and its leuco form is revealed: in the mass spectrum of the dye cation Cat+ (oxidized form with the molecular weight 284), an intense product of its reduction with m/z 285 is recorded, while the mass spectrum of the leuco dye (reduced form with the molecular weight 285) corresponds to an oxidized form with a dominating peak at m/z 284. An explanation of this empirical fact is proposed: the redox reactions induced by ionizing factors under the conditions of secondary emission experiments pass in the direction permitted for the particular initial form of the redox-active compound. Namely, an oxidized form undergoes reduction, whereas the reduced form is oxidized. This effect should be taken into account for the correct identification of redox-active compounds by their secondary emission mass spectra and for simulating redox reactions in the systems containing redox-active dyes under mass spectrometric conditions.
About the authors
M. V. Kosevich
Vеrkin Institutе fоr Lоw Tеmреrаturе Рhуsiсs аnd Еnginееring, Nаtiоnаl Асаdеmу оf Sсiеnсеs оf Ukrаinе
Author for correspondence.
Email: mvkosevich@ilt.kharkov.ua
Ukraine, Khаrkiv, 61103
O. A. Boryak
Vеrkin Institutе fоr Lоw Tеmреrаturе Рhуsiсs аnd Еnginееring, Nаtiоnаl Асаdеmу оf Sсiеnсеs оf Ukrаinе
Email: mvkosevich@ilt.kharkov.ua
Ukraine, Khаrkiv, 61103
V. S. Shelkovsky
Vеrkin Institutе fоr Lоw Tеmреrаturе Рhуsiсs аnd Еnginееring, Nаtiоnаl Асаdеmу оf Sсiеnсеs оf Ukrаinе
Email: mvkosevich@ilt.kharkov.ua
Ukraine, Khаrkiv, 61103
V. G. Zobnina
Vеrkin Institutе fоr Lоw Tеmреrаturе Рhуsiсs аnd Еnginееring, Nаtiоnаl Асаdеmу оf Sсiеnсеs оf Ukrаinе
Email: mvkosevich@ilt.kharkov.ua
Ukraine, Khаrkiv, 61103
V. V. Orlov
Vеrkin Institutе fоr Lоw Tеmреrаturе Рhуsiсs аnd Еnginееring, Nаtiоnаl Асаdеmу оf Sсiеnсеs оf Ukrаinе
Email: mvkosevich@ilt.kharkov.ua
Ukraine, Khаrkiv, 61103