Jiang Jinqiang, Tong Xia, Zhao Yue
Département de chimie, Université de Sherbrooke, Sherbrooke, Québec, Canada J1K 2R1.
J Am Chem Soc. 2005 Jun 15;127(23):8290-1. doi: 10.1021/ja0521019.
A new and general design strategy is presented for amphiphilic block copolymers whose micellar aggregates can be dissociated by light. A diblock copolymer composed of hydrophilic poly(ethylene oxide) (PEO) and a hydrophobic polymethacrylate bearing pyrene pendant groups (PPy) was synthesized using ATRP. Upon UV light irradiation of polymer micellar solutions, the photosolvolysis of pyrene moieties results in their detachment from the polymer and converts the hydrophobic PPy block into hydrophilic poly(methacrylic acid). This effect leads to complete dissociation of polymer micelles.
提出了一种新的通用设计策略，用于制备胶束聚集体可通过光照解离的两亲性嵌段共聚物。使用原子转移自由基聚合（ATRP）合成了一种由亲水性聚环氧乙烷（PEO）和带有芘侧基的疏水性聚甲基丙烯酸酯（PPy）组成的二嵌段共聚物。在对聚合物胶束溶液进行紫外光照射时，芘部分的光解导致其从聚合物上脱离，并将疏水性PPy嵌段转化为亲水性聚甲基丙烯酸。这种效应导致聚合物胶束完全解离。
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