Nishimura Ryo, Fujisawa Eri, Ban Ifu, Iwai Ryota, Takasu Shoya, Morimoto Masakazu, Irie Masahiro
Department of Chemistry and Research Center for Smart Molecules, Rikkyo University, Nishi-Ikebukuro 3-34-1, Toshima-ku, Tokyo 171-8501, Japan.
Chem Commun (Camb). 2022 Apr 12;58(30):4715-4718. doi: 10.1039/d2cc00554a.
This paper presents a strategy for improving the all-visible-light switching response of turn-on mode fluorescent diarylethene derivatives. Introduction of neopentyl or isobutyl substituents at the reactive carbons (2- and 2'-positions) of an oxidized bis(benzothienyl)perfluorocyclopentene derivative, which undergoes both cyclization and cycloreversion reactions upon irradiation with visible light, was effective in increasing the cycloreversion quantum yield by one or two orders of magnitude in comparison with the yield of an ethyl-substituted derivative. Any significant influence on the cyclization and fluorescence quantum yields was not observed by the introduction of neopentyl or isobutyl substituents.
本文提出了一种改善开启模式荧光二芳基乙烯衍生物全可见光切换响应的策略。在氧化双（苯并噻吩基）全氟环戊烯衍生物的反应性碳（2-位和2'-位）引入新戊基或异丁基取代基，该衍生物在可见光照射下会发生环化和环反转反应，与乙基取代衍生物相比，有效提高了环反转量子产率一到两个数量级。引入新戊基或异丁基取代基未观察到对环化和荧光量子产率有任何显著影响。
