Single chains of strong polyelectrolytes in aqueous solutions at extreme dilution: Conformation and counterion distribution
文献类型：期刊论文
| 作者 | Xu, Guofeng1,2; Luo, Shuangjiang1,2; Yang, Qingbo1,2; Yang, Jingfa1; Zhao, Jiang1 |
| 刊名 | JOURNAL OF CHEMICAL PHYSICS
 |
| 出版日期 | 2016-10-14 |
| 卷号 | 145期号:14 |
| 英文摘要 | The molecular conformation of two typical polyelectrolytes, sodium polystyrene sulfonate (NaPSS) and quarternized poly-4-vinylpyridine (QP4VP), was studied in aqueous solutions without salt addition at the single molecular level. By fluorescence correlation spectroscopy, the hydrodynamic radius (Rh) of NaPSS and QP4VP with the molecular weight ranging more than one order of magnitude was measured. The scaling analysis of Rh exhibits scaling exponent of 0.70 and 0.86 for NaPSS and QP4VP in solutions without added salts, respectively, showing the conformation is much more expanded than random coil. Numerical fittings using the model of diffusion of a rod molecule agree with the data well, indicating that the polyelectrolyte chains take the rod-like conformation under the condition without salt addition. Further investigations by determining the electric potential of single PSS- chains using the photon counting histogram technique demonstrate the enhanced counterion adsorption to the charged chain at higher molecular weight. Published by AIP Publishing. |
| 收录类别 | SCI |
| 语种 | 英语 |
| 源URL | [http://ir.iccas.ac.cn/handle/121111/35162]  |
| 专题 | 化学研究所_高分子物理与化学实验室 |
| 作者单位 | 1.Chinese Acad Sci, Inst Chem, Beijing 100190, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Xu, Guofeng,Luo, Shuangjiang,Yang, Qingbo,et al. Single chains of strong polyelectrolytes in aqueous solutions at extreme dilution: Conformation and counterion distribution[J]. JOURNAL OF CHEMICAL PHYSICS,2016,145(14). |
| APA | Xu, Guofeng,Luo, Shuangjiang,Yang, Qingbo,Yang, Jingfa,&Zhao, Jiang.(2016).Single chains of strong polyelectrolytes in aqueous solutions at extreme dilution: Conformation and counterion distribution.JOURNAL OF CHEMICAL PHYSICS,145(14). |
| MLA | Xu, Guofeng,et al."Single chains of strong polyelectrolytes in aqueous solutions at extreme dilution: Conformation and counterion distribution".JOURNAL OF CHEMICAL PHYSICS 145.14(2016). |
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来源：化学研究所
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