Ultra-fast dynamics in Coumarin 153 obtained by differential fluorescence
Date
2001
Authors
Villagrán-Muníz, M., author
García-Segundo, C., author
Marconi, Mario Carlo, author
Torga, J., author
Elsevier Science B. V., publisher
Journal Title
Journal ISSN
Volume Title
Abstract
We present measurements of the molecular rotational diffusion dynamics in the picosecond scale in a Coumarin 153 ethylene-glycol solution. A novel technique is used in which the fluorescent sample is excited with two femtosecond laser pulses in a pump and probe scheme. The spatial anisotropy generated by the first pulse excitation is sampled as a function of delay time through the fluorescence produced by the delayed pulse. The rotational time is obtained from the change in the fluorescence produced as a function of the delay time.
Description
Rights Access
Subject
time-resolved fluorescence
rotational diffusion time
rotational depolarization