Molar Mass Dependence of the Apparent Diffusion Coefficient of Flexible Highly Charged Polyelectrolytes in the Dilute Concentration Regime

Autor:	J. J. Tanahatoe, Maxim E. Kuil
Rok vydání:	1997
Předmět:	Condensed Matter::Soft Condensed Matter Persistence length Quantitative Biology::Biomolecules Molar mass Virial coefficient Counterion condensation Chemistry Ionic strength Diffusion Thermodynamics Effective diffusion coefficient Physical and Theoretical Chemistry Polyelectrolyte
Zdroj:	The Journal of Physical Chemistry A. 101:8389-8394
ISSN:	1520-5215 1089-5639
DOI:	10.1021/jp971086u
Popis:	In this study dynamic light scattering experiments have been performed on the flexible highly charged polyelectrolyte sodium poly(styrenesulfonate). The apparent diffusion coefficient was determined for five molar masses at a fixed ionic strength of 0.1 M at dilute polyelectrolyte concentrations. The apparent diffusion coefficients extrapolated to zero polyelectrolyte concentration were compared with theoretical D0 values calculated with a theoretical procedure based on the translational friction coefficient of the wormlike chain model of Yamakawa and Fujii. With the excluded volume theories of Fixman and Skolnick, and Barrett, the electrostatic persistence length according to Le Bret, and the counterion condensation theory of Manning, a satisfactory agreement was found for all molar masses. From the polyelectrolyte concentration dependence of the apparent diffusion coefficient, the diffusion second virial coefficient could be obtained. The molar mass dependence of the diffusion second virial coefficient ...
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::7d852833e9155052b3356e4cae296cf3 https://doi.org/10.1021/jp971086u Zobrazit plný text záznamu