Tanifuji Naoki, Matsuda Kenji, Irie Masahiro
Precursory Research for Embryonic Science and Technology (PRESTO), Japan Science and Technology Agency (JST), Kyushu University, 6-10-1 Hakozaki, Higashi-ku, Fukuoka 812-8581, Japan.
Org Lett. 2005 Aug 18;7(17):3777-80. doi: 10.1021/ol051463i.
Diarylethene derivatives having imino nitroxide and nitronyl nitroxide have been prepared to examine the effect of the radical substituents on the photochromic reactivity of 1,2-bis(2-methyl-1-benzothiophen-3-yl)perfluorocyclopentene. These radical substituents reduce the quantum yields of both cyclization and cycloreversion reactions. The nitronyl nitroxyl moiety is more effective to suppress the reactivity in comparison with the imino nitroxide moiety. [reaction: see text]
已制备出具有亚氨基氮氧自由基和硝酰氮氧自由基的二芳基乙烯衍生物，以研究自由基取代基对1,2-双(2-甲基-1-苯并噻吩-3-基)全氟环戊烯光致变色反应活性的影响。这些自由基取代基降低了环化反应和环化逆反应的量子产率。与亚氨基氮氧自由基部分相比，硝酰氮氧部分在抑制反应活性方面更有效。[反应：见正文]
