Photochemistry of SmCl 3 and SmBr 3 in air-saturated methanol solution

Abstract

Photochemistry of Sm 3+ has been studied by means of the nanosecond laser flash photolysis using a KrF excimer laser with the oscillation wavelength of 248 nm. Samples were an air-saturated methanol solution of SmCl 3 and that of SmBr 3. It is found that the photoreduction of Sm 3+ to Sm 2+ is induced in the methanol solution of SmCl 3 and the photoreduction yield at 100 ns after the laser irradiation and the lifetime of Sm 2+ are estimated to be 0.29 ± 0.06 and 5.2 ± 0.7 μs, respectively. In the photolysis of the methanol solution of SmBr 3, a solvated electron, e sol − and Br 2 − were formed.