Single chain contraction and re-expansion of polystyrene sulfonate: A study on its re-entrant condensation at single molecular level

doi:10.1063/1.3276278

CORC > 化学研究所 > 中国科学院化学研究所

	Single chain contraction and re-expansion of polystyrene sulfonate: A study on its re-entrant condensation at single molecular level
	Jia, Pengxiang 1; Zhao, Jiang 1,2
刊名	JOURNAL OF CHEMICAL PHYSICS
	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
出版者	AMER INST PHYSICS
WOS记录号	WOS:000273036300003
内容类型	期刊论文
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).