172612-67-8Relevant articles and documents
Photocyclization/cycloreversion quantum yields of diarylethenes in single crystals
Shibata, Katsunori,Muto, Keishi,Kobatake, Seiya,Irie, Masahiro
, p. 209 - 214 (2002)
Photocyclization and photocycloreversion quantum yields of three diarylethene derivatives were determined in the single-crystalline phase. The former yields in the crystalline phase were twice as large as those in solution. This can be attributed to only photoreactive antiparallel conformers being packed in the crystals, while in solution both photoreactive antiparallel and photoinactive parallel conformers coexist in almost equal amounts. The quantum yields in the crystals were found to be extremely high and 1,2-bis(2-ethyl-5-phenyl-3-thienyl)perfluorocyclopentene (3a) exhibited the quantum yield of unity (100%). The latter yield of the closed-ring isomer of 1,2-bis(2,5-dimethyl-3-thienyl)perfluorocyclopentene (1a) was similar to that in solution, while the yields of the closed-ring isomers of 1,2-bis(2,4-dimethyl-5-phenyl-3-thienyl)perfluorocyclopentene (2a) and 3a were higher than those in solution by a factor of 2 to 3. The high yields are attributable to the constrained conformation of the photogenerated closed-ring isomers in the crystal lattice.
Temperature dependence of the photoinduced micro-crystalline surface topography of a diarylethene
Fujinaga, Noriko,Nishikawa, Naoki,Sakiyama, Shingo,Yamazoe, Seiji,Kojima, Yuko,Tsujioka, Tsuyoshi,Yokojima, Satoshi,Nakamura, Shinichiro,Uchida, Kingo
, p. 8400 - 8403 (2013)
By alternate irradiation with UV and visible light, reversible topographical changes were observed. Step and valley formation while keeping the crystal confinement was observed below the glass transition temperature (T g), while crystal growth via a softened state was observed above the Tg on the same diarylethene crystalline surface.
Nanocrystallization of diarylethene and photochromic properties
Tagawa, Norio,Masuhara, Akito,Kasai, Hitoshi,Nakanishi, Hachiro,Oikawa, Hidetoshi
, p. 2857 - 2859 (2010)
We have succeeded, for the first time, in fabrication of diarylethene (DAE), 1,2-bis(2,4-dimethyl-5-phenyl-3-thienyl)-perfluorocyclopentene, nanocrystals using two nanocrystallization processes based on the reprecipitation method. Process I was the microwave irradiation after reprecipitation step. Process II uses a nucleating agent of a closed-DAE molecule without microwave irradiation. The crystal structure of the obtainedDAEnanocrystals was elucidated as the lattice structure of an open-DAE bulk crystal. Moreover, the DAE nanocrystals clearly exhibited photochromism by alternate irradiation of UV and visible light.
Photoswitchable Turn-on Mode Fluorescent Diarylethenes: Strategies for Controlling the Switching Response
Irie, Masahiro,Morimoto, Masakazu
, p. 237 - 250 (2018/02/21)
A new type of photoswitchable fluorescent diarylethenes, which have no fluorophore unit but emit strong fluorescence (ˉf3 0.9) in the closed-ring isomers, has been developed. They are sulfone derivatives of 1,2-bis(2-alkyl-4-methyl-5-phenyl-3-thienyl)perfluorocyclopentenes and 1,2-bis(2-alkyl-1-benzothiophen-3-yl)perfluorocyclopentenes. By chemical modifications of the structures their switching response was tuned to meet the requirements for super-resolution fluorescence microscopies. The water-soluble derivatives have been successfully applied to acquire super-resolution bioimages using a single-wavelength visible beam.
