文献类型：期刊文献

英文题名：Reversible light-controllable intelligent gel based on simple spiropyran-doped with biocompatible lecithin

作者：Chang, Dongdong;Yan, Wenhao;Yang, Yide;Wang, Qiaochun;Zou, Lei[1]

机构：[1]East China Univ Sci & Technol, Key Lab Adv Mat, Shanghai 200237, Peoples R China; East China Univ Sci & Technol, Inst Fine Chem, Shanghai 200237, Peoples R China

年份：2016

卷号：134

起止页码：186

外文期刊名：DYES AND PIGMENTS

收录：;EI(收录号：20162902614880);WOS:【SCI-EXPANDED(收录号:WOS:000383526000023)】；

基金：This work was financially supported by National Basic Research 973 Program (2013CB733700), National Natural Science Foundation of China (Nos. 21302056, 21372076, 21190033). Professor He Tian is also acknowledged for helpful discussion.

语种：英文

外文关键词：Spiropyran; Lecithin; Light-controllable; Reversible; Organogel

摘要：A photochromic spiropyran (SP) compound was doped into a two-component lecithin-Ca2+ organogel, which could coordinate with calcium ions or not by UV/Vis irradiation. Under UV irradiation, SP was isomerized into merocyanine (MC) that coordinated with Ca2+ and resulted in the original pale grey transparent gel transforming to deep-purple fluid, causing the fluid viscosity to decrease nearly 12-fold. Upon exposure to visible light, the MC reverted to the SP form which released the Ca2+ and the organogel was retrieved, also the viscosity recovered its initial value. This cycle could be repeated several times without loss of response. All the gelation components were commercially cheap available and the SP could be prepared by facile material and simple process, so a novel economic and simple organic doped type light-controllable gel-to-sol transition system was constructed, which provide more possibility for its practical application in controlled drug delivery. (C) 2016 Elsevier Ltd. All rights reserved.