Diffusion mobility of alkali metals in perfluorinated sulfocationic and carboxylic membranes as probed by 1H, 7Li, 23Na, and 133Cs NMR spectroscopy

被引：18
|
作者：
Volkov, V. I. [1 ]
Volkov, E. V. [1 ]
Timofeev, S. V.
Sanginov, E. A. [1 ]
Pavlov, A. A. [1 ]
Safronova, E. Yu. [2 ]
Stenina, I. A. [2 ]
Yaroslavtsev, A. B. [2 ]
机构：
[1] Russian Acad Sci, Inst Chem Phys, Chernogolovka 142432, Moscow Oblast, Russia
[2] Russian Acad Sci, NS Kurnakov Gen & Inorgan Chem Inst, Moscow 119991, Russia
来源：
RUSSIAN JOURNAL OF INORGANIC CHEMISTRY | 2010年 / 55卷 / 03期
基金：
俄罗斯基础研究基金会;
关键词：
NUCLEAR-MAGNETIC-RESONANCE; TRANSPORT; RELAXATION; IONS;
D O I：
10.1134/S0036023610030022
中图分类号：
O61 [无机化学];
学科分类号：
070301 ; 081704 ;
摘要：
The hydration, state, and ion mobility of protons and alkali metal cations (Li+, Na+, and Cs+) in perfluorinated sulfocationic membranes (MF-4SK) and carboxylic membranes (F-4KF) were studied using NMR and impedance spectroscopy. The hydration numbers and translational mobilities of ions and the formation conditions for cation/ionogenic group tight ion pairs were ascertained proceeding from analysis of chemical shifts and H-1, Li-7, Na-23, and Cs-133 NMR line widths. NMR data correlate with the results of ion conductivity measurements. The translational mobility of cations and ionic conductivity in the sulfocationic membranes are higher than in the carboxylic membranes and increase in the order Cs+-Na+-Li+.
引用
收藏
页码：318 / 324
页数：7
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