低临界溶液温度
甲基丙烯酸酯
原子转移自由基聚合
单体
紧身衣
聚合物
共聚物
高分子化学
甲基丙烯酸甲酯
荧光
材料科学
乙二醇
光化学
共轭体系
化学
有机化学
物理
量子力学
作者
R París,Isabel Quijada‐Garrido,Olga Garcı́a,Marta Liras
出处
期刊:Macromolecules
[American Chemical Society]
日期:2010-12-14
卷期号:44 (1): 80-86
被引量:59
摘要
A methacrylic monomer containing the dye 4,4-difluoro-4-bora-3a,4a-diaza-s-indacene (BODIPYMA) was synthesized to provide fluorescence properties to three different thermo-sensitive families of polymers based on 2-(2-methoxyethoxy)ethyl methacrylate (MEO2MA). Initially, linear random terpolymers of MEO2MA, oligo(ethylene glycol) methyl ether methacrylate (OEG8−9MA) with Mn = 475 g mol−1, and a very low proportion of BODIPYMA were synthesized by atom transfer radical polymerization (ATRP). These terpolymers showed lower critical solution temperature (LCST), which values were easily tuned by changing the monomeric composition, and fluorescence, which intensity increases significantly after this thermal transition. Second, a family of diblock copolymers was formed by the ATRP of MEO2MA and a very short block of BODIPYMA. They also behave as a fluorescent thermometer in water but, in this case, the fluorescence quantum yield decreased due to the intermolecular π−π stacking of BODIPY dyes. In addition, a MEO2MA−BODIPYMA based hydrogel was prepared to show that the optical and fluorescence properties also exhibit a sudden and reversible change at the volume transition temperature (VTT) of the hydrogel.
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