Department of Applied Chemistry, Graduate School of Engineering, Osaka City University, 3-3-138 Sugimoto, Osaka 558-8585, Japan.
Chem Commun (Camb). 2013 Mar 21;49(23):2362-4. doi: 10.1039/c3cc00053b.
Thiophene-S,S-dioxidized diarylethenes introducing bulky substituents at the reactive positions were newly synthesized. The diarylethenes showed reversible photochromism, whereas the photocycloreversion reaction was suppressed by thiophene-oxidation. The diarylethene closed-ring isomers having secondary alkyl groups at the reactive positions were found to undergo thermal bleaching reactions which produce at least three types of byproducts. Such materials could find application as light-starting irreversible thermosensors.
新合成了在反应位置带有大体积取代基的噻吩-S,S-二氧化物二芳基乙烯。这些二芳基乙烯表现出可逆光致变色性，而光环化反应则被噻吩氧化抑制。在反应位置带有仲烷基的二芳基乙烯闭环异构体被发现会发生热消色反应，产生至少三种类型的副产物。这些材料可作为光引发的不可逆热传感器应用。
