TRANSPORT OF THALLIUM(I) COUNTERION IN POLYELECTROLYTE SOLUTION DETERMINED BY VOLTAMMETRY WITH MICROELECTRODES AND BY PULSED-FIELD-GRADIENT, SPIN-ECHO NMR

被引：26

作者：

CISZKOWSKA, M ^{[1
]}

ZENG, L ^{[1
]}

STEJSKAL, EO ^{[1
]}

OSTERYOUNG, JG ^{[1
]}

机构：

[1] N CAROLINA STATE UNIV,DEPT CHEM,RALEIGH,NC 27695

来源：

JOURNAL OF PHYSICAL CHEMISTRY | 1995年 / 99卷 / 30期

关键词：

D O I：

10.1021/j100030a022

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Steady-state voltammetry at microelectrodes and pulsed-field-gradient spin-echo NMR are compared as techniques for measurement of diffusion coefficients in solutions of polyelectrolytes. The NMR technique is well established in this application and thus is employed as a reference technique. We used Tl+ as a counterion probe, poly(styrenesulfonic acid) (PSSA) as polyelectrolyte, and LiClO4 as supporting electrolyte, to investigate the interactions of counterions with polyions in systems for various concentration. We measured Tl-205(+) Selfdiffusion coefficients by NMR and compared the NMR results with the results for gradient diffusion from voltammetry with microelectrodes. Identical results show that the electrochemical measurements are free of artifacts associated with the intrinsic interfacial nature of the experiment and confirm the identity of self- and gradient-diffusion coefficients under the range of conditions applied.

引用

页码：11764 / 11769

页数：6

共 63 条

[31] MEAN ACTIVITY-COEFFICIENTS FOR SIMPLE ELECTROLYTE IN AQUEOUS MIXTURES OF POLYELECTROLYTE AND SIMPLE ELECTROLYTE - SYSTEM SODIUM POLYSTYRENESULFONATE-SODIUM CHLORIDE [J].