Intermolecular vibrations of the van der Waals complex p-C6H4FCH3-Ar

Resonant two-photon ionization spectrum of p-C6H4FCH3...Ar through the S-1<-- S-0 transition revealed a number of bands near the origin 0(0)(0). All these bands except for those due to the internal rotational transitions of the CH3 group, are assigned to the low-frequency intermolecular vibrations. Quantum calculations using the method of linear-combination of three-dimensional harmonic oscillator products (LCHOP) were carried out to assist the spectral assignments