Raman spectroscopic study of water in the poly(ethylene glycol) hydration shell
Raman spectroscopic study of water in the poly(ethylene glycol) hydration shell
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DOI：
10.1016/0022-2860(96)09308-8
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发表时间：
1996-07-31
影响因子：
3.8
通讯作者：
Ponterio, R
中科院分区：
文献类型：
--
作者：
Crupi, V;Jannelli, MP;Ponterio, R
本文报道了聚乙二醇水溶液的拉曼散射光谱随浓度和温度的变化。我们表明，O-H带的形状可以再现由一个适当的叠加体和水化水的光谱。这两种贡献的相对量随浓度和温度而变化，提供了与聚合物链结合的水分子数量的信息。结果表明，当水浓度增加时，水分子饱和聚合物的每个氧原子的两个孤对，与先前的绝热压缩性和非相干准弹性中子散射测量一致。
Raman scattering spectra of polymeric aqueous solutions of poly(ethylene glycol) vs. concentration and temperature are presented. We show that the shape of the O-H band can be reproduced by a suitable superposition of the spectra of bulk and hydration water. The relative amount of the two contributions changes with concentration and temperature, furnishing information on the number of water molecules bonded to the polymer chain. The results show that, when water concentration increases, water molecules saturate the two lone pairs of each oxygen atom of the polymer in agreement with previous adiabatic compressibility and Incoherent Quasi Elastic Neutron Scattering measurements.