title: Synthesis, crystal structure and characterization of photochromic 1,2-bis{2-ethyl-5-[2-(1,3-dioxolane)]-3-thienyl}perfluorocyclopentene.
abstract: A novel photochromic diarylethene, 1,2-bis{2-ethyl-5-[2-(1,3-dioxolane)]-3-thienyl}perfluorocyclopentene (BEDTP), was synthesized and its structure was determined by single-crystal X-ray diffraction analysis. Its photochromic and fluorescent properties were also investigated. The results showed that this compound exhibited reversible photochromism, changing from colorless to magenta after irradiation with UV light both in solution and in the crystalline phase. In hexane solution, the open-ring isomer of BEDTP exhibited relatively strong fluorescence at 400 nm when excited at 282 nm. The fluorescence intensity decreased along with the photochromism upon irradiation with 254 nm light and its closed-ring isomer showed almost no fluorescence.
authors.affiliation: Jiangxi Key Lab of Organic Chemistry, Jiangxi Science & Technology Normal University, Nanchang 330013, China. pushouzhi@tsinghua.org.cn
authors.forename: Shouzhi
authors.initials: S
authors.lastname: Pu
authors.forename: Tianshe
authors.initials: T
authors.lastname: Yang
authors.forename: Ruji
authors.initials: R
authors.lastname: Wang
authors.forename: Fushi
authors.initials: F
authors.lastname: Zhang
authors.forename: Jingkun
authors.initials: J
authors.lastname: Xu
mesh_terms: D003460:Crystallization; D018360:Crystallography, X-Ray; D003517:Cyclopentanes / Q000138:chemical synthesis* / Q000737:chemistry*; D005453:Fluorescence; D007536:Isomerism; D008958:Models, Molecular; D015394:Molecular Structure; D010777:Photochemistry; D013237:Stereoisomerism; D014466:Ultraviolet Rays
chemical_list: D003517:Cyclopentanes