Photochromism of a diarylethene derivative in aqueous solution capping with a water-soluble nano-cavitand
Photochromism of a diarylethene derivative in aqueous solution capping with a water-soluble nano-cavitand
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DOI：
10.1016/j.jphotochem.2009.03.010
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发表时间：
2009-09-05
影响因子：
4.3
通讯作者：
Irie, Masahiro
中科院分区：
文献类型：
--
作者：
Saitoh, Masashi;Fukaminato, Tuyoshi;Irie, Masahiro
将光致变色的二芳基乙烯1，2-bis(3-methyl-2-thienyl)perfluorocyclopentene(1)包埋在水溶性纳米空泡和2中，以诱导其在水溶液中的光致变色性能。H-1核磁共振测量证实了在D2O溶液中1和2之间形成了1：1的络合物。在紫外光和可见光的照射下，包裹在纳米空穴中的二芳基乙烯即使在水溶液中也表现出可逆和高效的光致变色反应。光环化和光环还原量子产率与在有机溶剂中观察到的基本相似。H-1NOESY测量表明，二芳基乙烯在水溶液中的高效光致变色性能归因于2的空孔选择性地捕获了疏水的全氟环戊烯部分，而活性的噻吩部分则不存在于空腔中。(C)2009爱思唯尔B.V.保留所有权利。
A photochromic diarylethene, 1,2-bis(3-methyl-2-thienyl)perfluorocyclopentene (1) was encapsulated into water-soluble nano-cavitand 2 to induce the photochromic performance in aqueous solution. H-1 NMR measurements confirmed the formation of 1:1 complex between 1 and 2 in a D2O solution. Upon irradiation with UV and visible light, encapsulated diarylethene within nano-cavitand exhibited reversible and efficient photochromic reactions even in the aqueous solution. The photocyclization and photocycloreversion quantum yields are almost similar to those observed in organic solvents. The efficient photochromic performance of the diarylethene in aqueous solution is attributed to the fact that the empty pore of 2 selectively captures the hydrophobic perfluorocyclopentene moiety and the reactive thiophene moieties are free from the cavity, as evidenced by H-1 NOESY measurement. (C) 2009 Elsevier B.V. All rights reserved.