354528-32-8Relevant academic research and scientific papers
Substituent effect on the photochromic reactivity of bis(2-thienyl)perfluorocyclopentenes
Uchida, Kingo,Matsuoka, Toyokazu,Kobatake, Seiya,Yamaguchi, Tadatsugu,Irie, Masahiro
, p. 4559 - 4565 (2001)
Substituent effect on the photochromic reactivity of bis(2-thienyl)perfluorocyclopentenes was examined. Introduction of phenyl groups having electron-donating substituents on the para-position of the phenyl ring to the 5-position of the thiophene rings shifted the absorption bands of the open-ring isomers to longer wavelengths and reduced the quantum yield of the cyclization reactions. The substitution with p-(N,N-diethylamino)phenyl groups prohibited the cyclization reaction. The absorption spectra of the closed-ring isomers were not influenced by the substitution.
Solid-State fluorescence behavior induced by photochemical ring-opening reaction of 1,2-bis(3-methyl-5-phenyl-2-Thienyl)perfluorocyclopentene
Nakahama, Tatsumoto,Kitagawa, Daichi,Sotome, Hikaru,Ito, Syoji,Miyasaka, Hiroshi,Kobatake, Seiya
, p. 153 - 157 (2018/02/21)
Crystals consisting of the closed-ring form of 1,2-bis(3- ethyl-5-phenyl-2-Thienyl)perfluorocyclopentene underwent a photochemical ring-opening reaction accompanying crystal fragmentation upon irradiation with visible light. The open-ring form crystal produced by the ring-opening reaction exhibited green fluorescence, whereas open-ring form crystals produced by recrystallization exhibit orange or yellow fluorescence depending on the polymorphic forms. The fluorescence quantum yield of the photogenerated open-ring form crystal was larger than that in n-hexane. The open-ring form exhibits different fluorescence colors depending on the intermolecular interaction in different states.
