An excitation profile study of the resonance Raman effect of I2 in solutions

The resonance Raman effect of I 2 was observed in chloroform, benzene- d 6 and tetrahydrofuran solutions with eleven exciting frequencies by Ar + , Kr + and He-Ne lasers. Excitation profiles obtained for the ν I-I fundamental in benzene- d 6 and tetrahydrofuran showed apparently different features from that of chloroform. It is demonstrated in a simulative calculation that the anomalous profile in the former two solvents could be caused by the interference between partial contributions to the scattering tensor, one from the locally excited state responsible for the visible absorption and the other from the charge-transfer state, both of the complex formed.