The structure and low-frequency vibrations of jet-cooled molecules of diphenyl ether are studied with the resonance-enhanced two-photon ionization technique. The origin for the S1 S0 transition is assigned at 35,873 cm-1 and, within 400 cm-1, the vibrational progressions suggest the existence of different conformations proposed for this molecule. A potential energy surface for the ground state, obtained with the use of group theory, is checked against the conformational energy surface given by molecular mechanics simulations.
Int. J. Mass Spectrom.

Paiva, A. C. S., Kistemaker, P. G., & Weeding, T. L. (2002). A REMPI investigation of the minimum energy conformations of diphenyl ether. Int. J. Mass Spectrom., 221, 107–115. doi:10.1016/s1387-3806(02)00910-7