The structure and characteristics of photochromic dithienylethenes

Autor: M. M. Krayushkin, L. G. Vorontsova, B. M. Uzhinov
Jazyk: angličtina
Rok vydání: 2001
Předmět:
Zdroj: International Journal of Photoenergy, Vol 3, Iss 1, Pp 25-32 (2001)
Druh dokumentu: article
ISSN: 1110-662X
1110662X
DOI: 10.1155/S1110662X01000034
Popis: The data on X-ray diffraction analysis for dihetarylethenes with perfluorocyclopentene (F), maleic anhydride (M) and cyclobutenedione (S) bridges between thienyl fragments were summarized and their photochromic properties were discussed. It was established that benzoxazole and benzothiazole substituents in position 5 of thienyl rings are coplanar to the plane of thiophene cycles. Thienyl fragments in A form of all dithienylethenes are considerably turned relative to the plane of bridging cycle. It means that there is no conjugation between π-electrons of aromatic heterocycles and double bond of the bridge.
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