UV Photolysis and Thermal Annealing of H2S, HI, and H2CO in Solid Xe: Electronic Absorption Spectra of the Products

Abstract

Photochemical studies on H 2 S, HI, and H 2 CO in solid Xe matrix are described with emphasis on the electronic absorption spectra of the products containing xenon atoms such as HXeSH, HXeI, and HXeH. These rare-gas molecules were prepared using UV photolysis of the precursors and annealing of the matrixes. The assignments are based on correlation between the UV spectra and known IR absorption bands of HXeSH, HXeI, and HXeH. It was found that the absorption maximum of HXeSH is near 290 nm, HXeI has two maxima at 310 and 410 nm, and HXeH absorbs around 230 nm. The present direct absorption measurements are in good agreement with previous photodecomposition data on HXeH.