Laser induced fluorescence spectrum of matrix isolated CS+2

Abstract

The laser induced fluorescencespectrum of the CS2 cation has been obtained in solid Ne and Ar matrices. The transitions observed originate in the X 2Π state and terminate in the A 2Π state. In the Ne matrix, sharp lines with well resolved vibrational structure are observed. There is only a very small difference between gas‐phase and Ne matrix values for the electronic origin and vibrational frequencies, although the latter analysis can be extended somewhat in the matrix. In the Ar matrix only a poorly resolved and strongly shifted CS+ 2spectrum is observed. A qualitative explanation for this different behavior is advanced.