Electronic transitions of CO, N2 and NO molecules trapped in solid rare gas matrices: Qualitative discussion

The experimental data, previously reported, regarding the electronic transitions of matrix isolated CO, N 2 , and NO are qualitatively related to the site dimension. The magnitude of the perturbation depends essentially on the nature of the transition or, in other words, on the dimension of the excited orbital. Valence transitions are modified very little whereas Rydberg transitions are strongly affected. The problem of rotation in solid is approached and the orientation of N 2 in neon is deduced from the aspect of the spectrum.