Sum frequency generation study on the structure of water in the vicinity of an amphoteric polymer brush.
Sum frequency generation study on the structure of water in the vicinity of an amphoteric polymer brush.
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DOI：
10.1016/j.colsurfb.2011.11.012
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发表时间：
2012-03
期刊：
影响因子：
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通讯作者：
T. Kondo;Makoto Gemmei-Ide;H. Kitano;K. Ohno;H. Noguchi;K. Uosaki
中科院分区：
文献类型：
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作者：
T. Kondo;Makoto Gemmei-Ide;H. Kitano;K. Ohno;H. Noguchi;K. Uosaki
以甲基丙烯酸（MA）和甲基丙烯酸二甲氨基乙酯（DMAEMA）为单体，通过表面引发可逆加成-断裂链转移聚合反应，在石英棱镜表面制备了两性聚电解质刷。和频产生方法表明，在两性聚合物刷-水界面的水分子并没有很大的取向相比，在裸露的石英棱镜，带负电荷的PolyMA和带正电荷的PolyDMAEMA刷的表面。两性聚合物刷对邻位水结构的微扰效应与用拉曼和红外光谱分别观察到的两性聚合物水溶液和两性聚合物薄膜的微扰趋势一致。
A polyampholyte brush was prepared on the surface of a quartz prism by surface-initiated reversible addition-fragmentation chain-transfer polymerization of methacrylic acid (MA) and 2-(dimethylamino)ethyl methacrylate (DMAEMA) at a monomer ratio of 1:1. The sum frequency generation method indicated that water molecules at the amphoteric polymer brush–water interfaces were not greatly oriented in comparison with those at the surfaces of bare quartz prisms, and negatively charged PolyMA and positively charged PolyDMAEMA brushes. The small perturbation effect of an amphoteric polymer brush on the structure of vicinal water was in accordance with the tendency of aqueous solution and thin films of amphoteric polymers observed by using Raman and infrared spectroscopies, respectively.