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+.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11577/115444
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