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International Journal of Photoenergy
Volume 1 (1999), Issue 3, Pages 183-190

Thermally irreversible photochromic dithienylethenes

1N. D. Zelinsky Institute of Organic Chemistry, Leninsky prospect, 47, Moscow 117913, Russia
2M. V. Lomonosov Moscow State University, Chemistry Department, Vorob'evy Gory, Moscow 119899, Russia

Copyright © 1999 Hindawi Publishing Corporation. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


A lot of previously unknown derivatives of dithienylperfluorocyclopentene (DTPFCP) were synthesized. It was shown that 2,2-dialkylsubstituted DTPFCP'S are phtochromes. The quantum yields of forward and backward photochemical reactions and spectral parameters of open and cyclic forms of the photochromes synthesized were measured. An attempt to obtain fluorescing phtochromes by means of introduction of benzoxazolyl, benzthiazolyl and 1,2,4-oxadiazolyl moieties in 5 and 5 positions of DTPFCP failed; these compounds were synthesized but they do not fluoresce.