Femtosecond reaction dynamics of a photochromic dithienylethene derivative

J. Ern, A. Bens, H. D. Martin, S. Mukamel, D. Schmid, S. Tretiak, E. Tsiper, C. Kryschi

Research output: Contribution to journalConference articlepeer-review

33 Citations (Scopus)


The dynamics of the photochromic ring-closure reaction of 1,2-bis[5-formyl-2-methyl-thien-3-yl]perfluorocyclopentene (CHO-BMTFP) in dichloromethane were monitored by fs transient absorption spectroscopy. The open isomer was excited using a 260 fs pump pulse tuned to the S0-S1 absorption transition at 308 nm. A temporally delayed white-light continuum probe pulse measures the rise dynamics of the ground-state absorption spectrum of the closed isomer which exactly displays the monoexponential dynamics of the ring-closure reaction with a time constant of about 2.3 ps. These spectroscopic data are discussed in terms of a model potential calculated in the collective electronic oscillator (CEO) approach.

Original languageEnglish
Pages (from-to)742-744
Number of pages3
JournalJournal of Luminescence
Publication statusPublished - May 2000
Externally publishedYes
EventInternational Conference on Luminescence and Optical Spectroscopy of Condensed Matter (ICL'99) - Osaka, Jpn
Duration: 23 Aug 199927 Aug 1999


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