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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.

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Subject

time-resolved fluorescence
rotational diffusion time
rotational depolarization

Citation

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