Room-temperature ionic liquid-organic solvent mixtures: Conductivity and ionic association

被引：50
|
作者：
Tokuda, H
Baek, SJ
Watanabe, M
机构：
[1] Yokohama Natl Univ, Dept Chem & Biotechnol, Hodogaya Ku, Yokohama, Kanagawa 2408501, Japan
[2] CREST JST, Hodogaya Ku, Yokohama, Kanagawa 2408501, Japan
来源：
ELECTROCHEMISTRY | 2005年 / 73卷 / 08期
关键词：
room temperature ionic liquids; PGSE-NMR; self-diffusion coefficient; ionic association;
D O I：
10.5796/electrochemistry.73.620
中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
Ion-transport properties of room-temperature ionic liquids (RTILs), N, N-diethyl-N-methoxyethyl-N-methyl ammonium (DEME) with different anions, BF4 and (CF3SO2)(2)N, as well as their mixed systems with two different organic solvents, propylene carbonate (PC) and 1,2-dichloroethane (DCE), have been explored by means of conductometry and pulsed-field-gradient spin-echo (PGSE) NMR diffusivity measurements. In a highly concentrated range from the neat ionic liquids to 1 mol dm(-3) solution, an increase in the organic solvent content contributes to an increase in the ionic diffusion coefficients, which is reflected in enhancement of the ionic conductivity. Such increase in the solvent content, on the other, hand, promotes the ionic association, even if highly polar PC is introduced as the solvent.
引用
收藏
页码：620 / 622
页数：3
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