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Photo-switchable dithienylethenes: threshold of the photoreactivity

Authors
Journal
Synthetic Metals
0379-6779
Publisher
Elsevier
Publication Date
Volume
115
Identifiers
DOI: 10.1016/s0379-6779(00)00327-1
Keywords
  • Photochromism
  • Diarylethenes
  • Dithienylethenes
  • Optical Switch
Disciplines
  • Chemistry
  • Physics

Abstract

Abstract The quantum yields of the photoinduced ring-closure and ring-opening reactions of a series of 1,2-dithienylperfluorocyclopentene derivatives have been determined in view of the development of materials for photonic applications based on these molecules. The reaction quantum yields as a function of the S 0–S 1 excitation energy exhibit clear threshold behavior and are otherwise little sensitive to the chemical nature of the substituent. A ground state energy difference between the two isomers of >1 eV is deduced from this data. Additional information on the reaction surface is obtained from the temperature dependence of the quantum yields of the ring-opening reaction.

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