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Ultraviolet absorption studies of the alkali metal atom-oxygen molecule matrix reaction

1976; Elsevier BV; Volume: 61; Issue: 3 Linguagem: Inglês

10.1016/0022-2852(76)90324-6

1096-083X

Lester Andrews,

Advanced Chemical Physics Studies

Alkali metal atoms were codeposited with oxygen at high dilution in argon on a sapphire window cooled to 17 K. Ultraviolet spectra contained a medium intensity absorption near 250 nm which exhibited a long wavelength component between 269 and 275 nm for the heavier alkali metals. The 250 nm band arises from M+O2− and is assigned to a π → π∗ superoxide transition, and the absorption near 270 nm, which increased on sample warming, is attributed to M+O4−.