Infra-red cryogenic studies. Part 8.—Carbon monoxide in matrices

Abstract

Infra-red spectra are reported of carbon monoxide in argon, methane, sulphur hexafluoride and neopentane matrices at a wide range of concentrations and over a temperature range 20 to 40 K. Multiple bands have been observed which, on the basis of their behaviour with concentration, have been unequivocally assigned to aggregates of CO molecules within the matrices. No evidence has been found for the rotation of CO in any of these matrices.