FREE IONS AND ION-PAIRING CLUSTERING IN THE SYSTEM LICF3SO3-PPON

被引：93
作者：
BERNSON, A
LINDGREN, J
机构：
[1] Institute of Chemistry, Uppsala University, S-751 21 Uppsala
来源：
SOLID STATE IONICS | 1993年 / 60卷 / 1-3期
关键词：
D O I：
10.1016/0167-2738(93)90271-4
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：
The LiCF3SO3-PPO(n) system (average PPO molecular weight: 3000) has been investigated using infrared spectroscopy. The effect of varying concentration (n = 10-140) and temperature (25-140-degrees-C) on the upsilon(SO3)s and upsilon(SO3)a stretching bands has been studied systematically and a model study in acetonitrile has been made. Cryptand [211] has gradually been added to the system to suppress the interaction between the lithium and the triflate ions by encapsulating the lithium ions in a controlled way. The number of non-coordinated triflate ions is clearly observed to increase as the concentration of cryptand increases. When equal amounts of lithium and cryptand are present virtually all triflate ions are free.
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页码：37 / 41
页数：5
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