Knowledge Bank

Samples of $CO2$ at high dilution in argon were deposited at 12K on a CaI window with concurrent argon resonance radiation from a microwave discharge, and the previously identified (1,2) product $CO3$ was isolated is the argon matrix. Consistent with the earlier work, visible light from a 1000W Hg-Xe are lamp destroyed the product species. Similar experiments involving the deposition of COS and $CS2$, or deposition of these molecules with an oxygen/argon mixture passing through the discharge, have yielded new photosensitive infrared product bands that may be assigned to $CO2S,COS2$, and $CS3$. Photolysis of these matrix samples using various cut-off filters, and use of carbon-13 and oxygen-18 isotopically-labeled precursors, indicate that more than one isomer of some of these species are being formed. A discussion of the products generated in these experiments will be presented.