Abstract
The appearance of a normal band FN and an anomalous band Fx, to the red of the former, in the fluorescence spectrum of solutions of 4-N,N-diethylaminoethylbenzoate in alkanes has been considered as evidence for the existence of a low energy twisted intramolecular charge transfer (TICT) excited state in electron acceptor substituted aniline derivatives [1]. Objections have been raised against this interpretation of the dual fluorescence [2]. Nevertheless, the TICT state seems to be widely accepted as a reasonable explanation of the phenomenon. Here we will present evidence that the long wavelength band in the spectrum arises from an adiabatic reaction of the molecule on the S2-surface, in which a conformational change takes place along a reaction coordinate Qxinvolving a deformation along the inversion coordinate of the amino group as well as an in-plane deformation of the benzene ring.
© 1992 The Author(s)
PDF ArticleMore Like This
P. Plaza, N. Dai. Hung, M.M. Martin, Y.H. Meyer, and W. Rettig
FC21 International Conference on Ultrafast Phenomena (UP) 1992
M. Sander, U. Brummund, K. Luther, and J. Troe
ThC13 International Conference on Ultrafast Phenomena (UP) 1992
P. Hébert, G. Baldacchino, T. Gustavsson, V. Kabelka, P. Baldeck, and J.-C. Mialocq
FC10 International Conference on Ultrafast Phenomena (UP) 1992