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1,2-Bis(2-ethyl-5-hydroxy­methyl-3-thien­yl)-3,3,4,4,5,5-hexa­fluoro­cyclo­pent-1-ene, a new photochromic diaryl­ethene compound

✍ Scribed by Yang, Tian-She ;Pu, Shou-Zhi ;Luo, Fu-Sheng ;Xu, Jing-Kun

Publisher
International Union of Crystallography
Year
2006
Tongue
English
Weight
258 KB
Volume
62
Category
Article
ISSN
1600-5368

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✦ Synopsis

The title compound, C 19 H 18 F 6 O 2 S 2 , is one of the most promising materials for optical memories and other optoelectronic devices. The molecular structure has a photoactive antiparallel conformation. The dihedral angles between the cyclopentene ring and the attached thiophene rings are 52.12 (1) and 52.70 (1) . The distance between the two reactive C atoms, i.e. the ring C atoms to which the ethyl groups are attached, is 3.596 (4) A ˚. A dichloromethane solution of the colorless crystals turns pink when exposed to UV radiation, with an absorption maximum of 542 nm.

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