Investigation of the interfacial water structure on poly[2-(dimethylamino)ethyl methacrylate] at the air/water interface by sum frequency generation vibrational spectroscopy
Investigation of the interfacial water structure on poly[2-(dimethylamino)ethyl methacrylate] at the air/water interface by sum frequency generation vibrational spectroscopy
复制标题
通过和频发生振动光谱研究空气/水界面聚[2-(二甲氨基)乙基甲基丙烯酸酯]的界面水结构
DOI：
10.1007/s11434-011-4963-4
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发表时间：
2012-02
影响因子：
--
通讯作者：
Zhang, Guanzhao
中科院分区：
文献类型：
--
作者：
Wu,Dan;Guo, Yuan;Liu,Guanming;Zhang, Guanzhao
The effect of pH on the conformation of surface alkyl groups and the structure of interfacial water molecules on poly[2-(dimethylamino)ethyl methacrylate] (PDEM) at the air/water interface were investigated with sum frequency generation vibrational spectroscopy (SFG-VS). At pH 4.1, the hydrogen bonding SFG spectra were similar to that of the air/pure water interface. As the pH increased from 5.4 to 9.6, the SFG intensities of both highly ordered hydrogen bonding (3200 cm−1 band) and less-ordered hydrogen bonding (3400 cm−1 band) were enhanced because of the charge-induced effect of deprotonated PDEM. The free OH peak disappeared completely because it was replaced by interfacial PDEM molecules. At pH 11.5, a new spectral band appeared at about 3580 cm−1 in the ppp and sps spectra, and this could be assigned to the C2v asymmetric stretching mode of the water molecules through molecular symmetry simulation. These hydrogen bonding structures are fully consistent with the conformational change of PDEM alkyl groups, and PDEM molecules act as a Hofmeister solvent. PDEM molecules are kosmotropic when they are charged and become more chaotropic as the pH increases.
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影响因子：
6.1
作者：
M. Shultz;Cheryl Schnitzer;Danielle Simonelli;S. Baldelli
通讯作者：
M. Shultz;Cheryl Schnitzer;Danielle Simonelli;S. Baldelli
影响因子：
3.9
作者：
S. An;R. Thomas
通讯作者：
S. An;R. Thomas
影响因子：
3.7
作者：
E. Tyrode;C. M. Johnson;A. Rutland;P. Claesson
通讯作者：
E. Tyrode;C. M. Johnson;A. Rutland;P. Claesson
影响因子：
4.4
作者：
HIROSE, C;AKAMATSU, N;DOMEN, K
通讯作者：
DOMEN, K
DOI：
10.29172/dbd20f34-3917-446f-9ffa-1c49e2c7f5e8
发表时间：
1992-06
期刊：
--
影响因子：
--
作者：
C. Ghélis
通讯作者：
C. Ghélis