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The Photochemistry of Solutions of Eu(III) and Eu(II)
Author(s) -
Haas Yehuda,
Stein Gabriel,
Tenne Reshef
Publication year - 1972
Publication title -
israel journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.908
H-Index - 54
eISSN - 1869-5868
pISSN - 0021-2148
DOI - 10.1002/ijch.197200051
Subject(s) - chemistry , scavenger , aqueous solution , proton , photochemistry , kinetics , excited state , irradiation , ion , hydrogen , radical , atomic physics , organic chemistry , physics , quantum mechanics , nuclear physics
Irradiation in the CT band of Eu 3+ in aqueous solution, in the presence of scavengers for H atoms, gives rise to formation of Eu 2+ and evolution of molecular hydrogen. The kinetics of these processes were studied as functions of the concentrations of Eu 3+ and scavenger, of pH, and of light intensity. The results are interpreted by means of a complex scheme in which an excited Eu 2+ donates an electron to a proton, the resulting H* initiating a series of dark reactions which lead to evolution of H 2 and oxidation of the scavenger.