Spectroscopic study and laser photochemistry of chlorine monofluoride in gaseous phase and in cryogenic solutions

This work aims at attaining a better understanding of phenomena induced in a system under photonic excitation, using isotopic selectivity as a tracer of the reaction routes. After a study of visible and infrared absorption spectroscopy of ClF, thermal and laser induced reactions with SF4 are reported, essentially in the gas phase. The proper conditions to obtain an isotopic effect are then determined, and experiments achieved accordingly have allowed us to propose a kinetic model for the reactions involved in the system. This was made possible especially owing to the obtained isotopic selectivity. A vibrational spectroscopic study of ClF in cryogenic solutions is also reported. Results obtained for ClF in liquid N2, O2 and Ar have been analyzed from the point of view of molecular dynamics, and have allowed us to emphasize specific interactions of ClF with N2. This effect has been also pointed out from spectra of ClF: N2 mixtures in liquid O2 or Ar