STARK EFFECT STUDIES OF THE ELECTRONIC SPECTRUM OF 1-PHENYLPYRROLE AT HIGH RESOLUTION. CHARGE TRANSFER STATES?

Abstract

We report Stark effect studies of the $S_{1}$-$S_{0}$ electronic spectrum of 1-phenylpyrrole (1PP) at high resolution. Analyses of these data yield values of the magnitudes and orientations of the permanent electric dipole moments of both electronic states. When combined with an earlier analysis of the vibrationally resolved spectrum,, 64$^{th}$ International Symposium on Molecular Spectroscopy, TB06, 2009.} the results provide new insights into the extent to which the $S_{1}$ state of 1PP is a charge transfer state.