The luminescence quenching was studied of excited UO22+ by Ni(CO)4, Fe(CO)5, M(CO)6, (M = W, Mo, Cr, V), and Mn2(CO)10, in aprotic solvents. Flash photolysis and ESR and IR spectroscopy show that the quenching occurs with formation of the paramagnetic reactive intermediate, M(CO)n+, and UO2+ ion. The bimol. quenching consts. k are related to the free energy change of the electron-transfer process; thus values of log k are correlated with the oxidn. potentials of M(CO)n. The primary photoproducts react in an irreversible redox process with formation of U(IV) and Mn+.
Quenching of Excited Uranyl Ion by Metal Carbonyls in Aprotic Solvents.
DI BERNARDO, PLINIO;
1979
Abstract
The luminescence quenching was studied of excited UO22+ by Ni(CO)4, Fe(CO)5, M(CO)6, (M = W, Mo, Cr, V), and Mn2(CO)10, in aprotic solvents. Flash photolysis and ESR and IR spectroscopy show that the quenching occurs with formation of the paramagnetic reactive intermediate, M(CO)n+, and UO2+ ion. The bimol. quenching consts. k are related to the free energy change of the electron-transfer process; thus values of log k are correlated with the oxidn. potentials of M(CO)n. The primary photoproducts react in an irreversible redox process with formation of U(IV) and Mn+.File in questo prodotto:
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