Investigation of the interfacial water structure on poly[2-(dimethylamino)ethyl methacrylate] at the air/water interface by sum frequency generation vibrational spectroscopy
文献类型：期刊论文
| 作者 | Wu Dan2; Guo Yuan1; Liu GuangMing3; Zhang GuangZhao3 |
| 刊名 | CHINESE SCIENCE BULLETIN
 |
| 出版日期 | 2012-03-01 |
| 卷号 | 57期号:9页码:984-991 |
| 关键词 | Ph Hydrogen Bonding Pdem Interface Sfg-vs |
| ISSN号 | 1001-6538 |
| DOI | 10.1007/s11434-011-4963-4 |
| 英文摘要 | 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 C (2v) 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. |
| 语种 | 英语 |
| WOS记录号 | WOS:000301441800005 |
| 出版者 | SCIENCE PRESS |
| 源URL | [http://ir.iccas.ac.cn/handle/121111/49435]  |
| 专题 | 中国科学院化学研究所 |
| 通讯作者 | Guo Yuan |
| 作者单位 | 1.Chinese Acad Sci, Inst Chem, State Key Lab Mol React Dynam, Beijing Natl Lab Mol Sci, Beijing 100190, Peoples R China 2.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China 3.Univ Sci & Technol China, Hefei Natl Lab Phys Sci Microscale, Hefei 230026, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wu Dan,Guo Yuan,Liu GuangMing,et al. Investigation of the interfacial water structure on poly[2-(dimethylamino)ethyl methacrylate] at the air/water interface by sum frequency generation vibrational spectroscopy[J]. CHINESE SCIENCE BULLETIN,2012,57(9):984-991. |
| APA | Wu Dan,Guo Yuan,Liu GuangMing,&Zhang GuangZhao.(2012).Investigation of the interfacial water structure on poly[2-(dimethylamino)ethyl methacrylate] at the air/water interface by sum frequency generation vibrational spectroscopy.CHINESE SCIENCE BULLETIN,57(9),984-991. |
| MLA | Wu Dan,et al."Investigation of the interfacial water structure on poly[2-(dimethylamino)ethyl methacrylate] at the air/water interface by sum frequency generation vibrational spectroscopy".CHINESE SCIENCE BULLETIN 57.9(2012):984-991. |
入库方式： OAI收割
来源：化学研究所
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