321735-27-7Relevant academic research and scientific papers
Photochromic fluorescent diarylethene nanocrystals grown in sol-gel thin films
Sanz-Menez, Nathalie,Monnier, Virginie,Colombier, Isabelle,Baldeck, Patrice L.,Irie, Masahiro,Ibanez, Alain
, p. 241 - 245 (2011)
Nanocrystals of two diarylethene compounds, 1,2-bis(2-ethyl-5-phenyl-3- thienyl)perfluorocyclopentene (D1) and 1,2-bis(3-methyl-2-thienyl)ethene (D2), were grown in sol-gel thin films and their optical properties (fluorescence and photo-conversion) were c
Alkyl substituent effects in photochemical and thermal reactions of photochromic thiophene-S,S-dioxidized diarylethenes
Shoji, Hiroaki,Kitagawa, Daichi,Kobatake, Seiya
, p. 933 - 941 (2014/03/21)
Thiophene-S,S-dioxidized diarylethenes introducing various alkyl groups at the reactive positions were newly synthesized. The diarylethenes showed reversible photochromism, whereas the photocycloreversion reaction was suppressed by thiophene-oxidation. Th
Photocyclization/cycloreversion quantum yields of diarylethenes in single crystals
Shibata, Katsunori,Muto, Keishi,Kobatake, Seiya,Irie, Masahiro
, p. 209 - 214 (2007/10/03)
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.
Photochromism of 1,2-Bis(2-ethyl-5-phenyl-3-thienyl)perfluorocyclopentene in a single-crystalline phase. Conrotatory thermal cycloreversion of the closed-ring isomer
Kobatake,Shibata,Uchida,Irie
, p. 12135 - 12141 (2007/10/03)
1,2-Bis(2-ethyl-5-phenyl-3-thienyl)perfluorocyclopentene (1a) was found to undergo a thermally reversible photochromic reaction in solution as well as in the single-crystalline phase. Upon irradiation with ultraviolet light the hexane or toluene solution
