950207-97-3Relevant academic research and scientific papers
Thiophene-S, S -dioxidized diarylethenes for light-starting irreversible thermosensors that can detect a rise in heat at low temperature
Kitagawa, Daichi,Tanaka, Koki,Kobatake, Seiya
, p. 6210 - 6215 (2017/07/11)
Diarylethenes having trimethylsilyl and triethylsilyl groups at the reactive positions and their S,S-dioxidized diarylethenes were synthesized and their optical and thermal properties were investigated. Upon irradiation with ultraviolet light, the diarylethenes and thiophene-S,S-dioxidized diarylethenes underwent photochromic reactions from the colourless open-ring isomer to the coloured closed-ring isomer. The photogenerated closed-ring isomers were found to undergo thermal bleaching reactions to produce colourless byproducts. In particular, the thiophene-S,S-dioxidized diarylethene having a triethylsilyl group at the reactive positions underwent the thermal bleaching reaction even at -40 °C. Such materials could be used as light-starting irreversible thermosensors that can detect a rise in heat at low temperature.
The irreversible thermo-bleaching function of a photochromic diarylethene having trimethylsilyl groups
Kobatake, Seiya,Imagawa, Hiroyuki,Nakatani, Hidenori,Nakashima, Seiichiro
body text, p. 1362 - 1367 (2009/09/24)
A new function of a photochromic diarylethene, having trimethylsilyl groups at the reactive positions, has been developed. Upon alternating ultraviolet and visible light irradiation, the diarylethene showed photoreversible photochromism in a polymer film, as well as in solution. The colored state changed to colorless immediately upon heating at 100 °C. The colorless state, which is different from the open-ring isomer, was stable under both ultraviolet and visible light irradiation. Such photochromic materials could potentially be used in applications as secret display materials. The Royal Society of Chemistry and the Centre National de la Recherche Scientifique 2009.
