Femtosecond transient absorption spectroscopy of a spirooxazine photochromic reaction

Naoto Tamai*, Hiroshi Masuhara

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

106 Scopus citations


The dynamics of CO bond cleavage followed by the structural change to merocyanine in the photochromic reaction of a spirooxazine derivative has been studied by femtosecond transient absorption spectroscopy. Within 2 ps after excitation, the very broad spectra assigned to the absorption of the transition state, following the Sn←S1 absorption spectrum of spirooxazine, were observed. The rate constants of CO bond cleavage and the relaxation from the transition state to a metastable merocyanine were estimated to be approximately (700 fs)-1 and (470 fs)-1, respectively.

Original languageEnglish
Pages (from-to)189-194
Number of pages6
JournalChemical Physics Letters
Issue number1-2
StatePublished - 27 Mar 1992

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