Single chain contraction and re-expansion of polystyrene sulfonate: A study on its re-entrant condensation at single molecular level
文献类型：期刊论文
| 作者 | Jia, Pengxiang1; Zhao, Jiang1,2 |
| 刊名 | JOURNAL OF CHEMICAL PHYSICS
 |
| 出版日期 | 2009-12-21 |
| 卷号 | 131期号:23 |
| 关键词 | Aggregation Dissolving Fluorescence Liquid Structure Polymer Electrolytes Polymer Solutions Precipitation |
| ISSN号 | 0021-9606 |
| DOI | 10.1063/1.3276278 |
| 英文摘要 | Single chain conformation of a polyelectrolyte (polystyrene sulfonate, PSS(-)Na(+)) during its re-entrant condensation was studied by fluorescence correlation spectroscopy (FCS) with single molecule sensitivity. The contraction and re-expansion of PSS(-)Na(+) chain were observed with the addition of counterions of different valencies. The formation of aggregation and precipitation of PSS(-)Na(+) and its redissolution were observed in accordance with the chain contraction and re-expansion process for the PSS(-)Na(+) chain upon the addition of trivalent La(3+) ion. Chain contraction and re-expansion of the PSS(-)Na(+) chain were also observed with the addition of monovalent Cs(+) and divalent Ca(2+) ions, under which condition, the re-entrant condensation was not observed. The results demonstrate that the high sensitivity of FCS can really study single PSS(-)Na(+) chain under extremely dilute situation. |
| 语种 | 英语 |
| WOS记录号 | WOS:000273036300003 |
| 出版者 | AMER INST PHYSICS |
| 源URL | [http://ir.iccas.ac.cn/handle/121111/66441]  |
| 专题 | 中国科学院化学研究所 |
| 通讯作者 | Zhao, Jiang |
| 作者单位 | 1.Chinese Acad Sci, Inst Chem, Beijing Natl Lab Mol Sci, Joint Lab Polymer Sci & Mat, Beijing 100190, Peoples R China 2.Chinese Acad Sci, Grad Sch, Beijing 100190, Peoples R China |
| 推荐引用方式 GB/T 7714 | Jia, Pengxiang,Zhao, Jiang. Single chain contraction and re-expansion of polystyrene sulfonate: A study on its re-entrant condensation at single molecular level[J]. JOURNAL OF CHEMICAL PHYSICS,2009,131(23). |
| APA | Jia, Pengxiang,&Zhao, Jiang.(2009).Single chain contraction and re-expansion of polystyrene sulfonate: A study on its re-entrant condensation at single molecular level.JOURNAL OF CHEMICAL PHYSICS,131(23). |
| MLA | Jia, Pengxiang,et al."Single chain contraction and re-expansion of polystyrene sulfonate: A study on its re-entrant condensation at single molecular level".JOURNAL OF CHEMICAL PHYSICS 131.23(2009). |
入库方式： OAI收割
来源：化学研究所
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