W. Rettig et al., INTRAMOLECULAR CHARGE-TRANSFER INDUCED BY SOLVENT INTERACTION, Journal de chimie physique et de physico-chimie biologique, 92(2), 1995, pp. 465-498
The effect of solvation on the appearance of a red shifted Twisted Int
ramolecular Charged Transfer emission is reviewed. Comparison between
condensed phase and small cluster red fluorescence is discussed in the
particular case of methyl 4-N,N-dimethylaminobenzoate (DMABME). Using
a supersonic expansion DMABME-(H2O)(n) clusters are studied by monito
ring at the same time mass spectra and dispersed fluorescence spectra
as well as by lifetime measurements. For DMABME-(H2O)(n) clusters, a c
lear red shifted fluorescence is observed readily when one or two wate
r molecules are clustered to the molecule. The results of this work ar
e compared with those obtained on the model compound 4-N,N-dimethylami
nobenzonitrile (DMABN), where no TICT emission is observed in small DM
ABN-(Solvent)(n) clusters.