The allomorphism of a photochromic diarylethene

✍ Scribed by Shou-Zhi Pu; Fu-Shi Zhang; Fan Sun; Ru-Ji Wang; Xin-Hong Zhou; Shek-Kiu Chan

• Book ID: 104252820
• Publisher: Elsevier Science
• Year: 2003
• Tongue: French
• Weight: 323 KB
• Volume: 44
• Category: Article
• ISSN: 0040-4039
• DOI: 10.1016/s0040-4039(02)02739-9

✦ Synopsis

The photochromic diarylethene, 1,2-bis(2-methyl-5-(2,2%-dicyanovinyl)-thien-3-yl)perfluorocyclopentene (1a), was synthesized by a novel method. Two kinds of single crystals of the compound were obtained depending on the different recrystallization conditions and their structures were determined by X-ray crystallographic analysis. Allomorphism of the photochromic diarylethene was discovered. The compound underwent a photochromic reaction both in solution and in the single crystalline phase of the anti-parallel conformer.