M. M. Krayushkin, B. M. Uzhinov, A. Yu. Martynkin, D. L. Dzhavadov, M. A. Kalik, V. L. Ivanov, F. M. Stoyanovich, L. D. Uzhinova, O. Yu. Zolotarskaya, "Thermally irreversible photochromic dithienylethenes", International Journal of Photoenergy, vol. 1, Article ID 628965, 8 pages, 1999. https://doi.org/10.1155/S1110662X9900032X
Thermally irreversible photochromic dithienylethenes
A lot of previously unknown derivatives of dithienylperfluorocyclopentene (DTPFCP) were synthesized. It was shown that -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 positions of DTPFCP failed; these compounds were synthesized but they do not fluoresce.
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