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High photoreduction yield of Eu3+to Eu2+in alcoholic solutions and its wavelength dependence

Authors
Journal
Journal of Alloys and Compounds
0925-8388
Publisher
Elsevier
Publication Date
Volume
192
Identifiers
DOI: 10.1016/0925-8388(93)90250-q
Disciplines
  • Physics

Abstract

Abstract Photoreduction yields of Eu 3+ to Eu 2+ in aqueous and alcoholic solutions were determined. The highest quantum yields were found to be 0.97 ± 0.16 for EuCl 3 in methanol under 308 nm excitation and 0.94 ± 0.17 in 2-propanol under 248 nm excitation. The lowest quantum yield was 0.12 ± 0.02 for Eu(ClO 4) 3 in aqueous solution under 193 nm excitation. The high photoreduction yields for EuCl 3 indicate that Cl' reacts efficiently with neighbouring alcohols. The yield was found to depend on the excitation wavelength for EuCl 3 in methanol solution.

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