Excited-State Solvation Dynamics in 4-Aminophthalimide
Solvation plays a major role in nearly every liquid-phase chemical reaction. Picosecond measurements of the dynamics of excited-state solvation have been exploited in the past for the study of such processes as hydrogen bond formation, “solvent-assisted” intramolecular charge transfer, and conformational isomerization[1–5]. This work explores the solvation dynamics following electronic excitation of isolated solute molecules. Molecules initially undergo a vertical transition to a Franck-Condon excited state, producing electronically excited molecules in ground state solvent environments. The equilibrium solvent configuration around an excited molecule may be significantly different than the ground state solvent configuration. Relaxation to the excited-state configuration would result in a time-dependent red shift in the emission spectrum.
KeywordsIntramolecular Charge Transfer Excited Molecule Isosbestic Point Streak Camera Conformational Isomerization
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