Vibronic features of 2,6-dimethylaniline, 2,6-dimethylaniline–NHD, and 2,6-dimethylaniline–ND2 by resonant two-photon ionization mass spectrometry
Abstract
The vibronic spectra of jet-cooled 2,6-dimethylaniline, 2,6-dimethylaniline–NHD, and 2,6-dimethylaniline–ND2 resulting from the S1←S0 electronic transition have been simultaneously recorded using resonant two-photon ionization mass spectrometry. The newly observed spectral features show that the active vibronic transitions are related to the aromatic ring vibrations, the NH2 inversion, and the CH3 rotational motions. These spectroscopic data are found to be consistent with the structural change upon electronic excitation, as predicted by abinitio calculations.