Microscopic Diffusion Dynamics of Silver Complex-Based Room-Temperature Ionic Liquids Probed by Quasielastic Neutron Scattering

被引：33

作者：

Mamontov, Eugene ^{[1
]}

Baker, Gary A. ^{[2
]}

Luo, Huimin ^{[3
]}

Dai, Sheng ^{[2
]}

机构：

[1] Oak Ridge Natl Lab, Neutron Scattering Sci Div, Oak Ridge, TN 37831 USA

[2] Oak Ridge Natl Lab, Div Chem Sci, Oak Ridge, TN 37831 USA

[3] Oak Ridge Natl Lab, Nucl Sci & Technol Div, Oak Ridge, TN 37831 USA

来源：

CHEMPHYSCHEM | 2011年 / 12卷 / 05期

关键词：

diffusion; ionic liquids; molecular dynamics; neutron scattering; silver; 1-BUTYL-3-METHYL IMIDAZOLIUM HEXAFLUOROPHOSPHATE; RELAXATION PROCESSES; SEPARATION; MEMBRANES; WATER; TRANSPORT; FUTURE;

D O I：

10.1002/cphc.201001017

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：

Quasielastic neutron scattering is used to probe the microscopic diffusion dynamics of the hydrogen-bearing cations of two different silver complex-derived room-temperature ionic liquids, [Ag(propylamine)(2)(+)][Tf2N-] (Tf = trifluoromethanesulfonyl) and [Ag(1-pentene)(+)][Tf2N-]. In the temperature range from 300 to 340 K, analysis of the scattering momentum trans-fer dependence of the data provides evidence for three distinct diffusion components. The slowest component describes the long-range cationic translational diffusion. A possible link between the microscopic diffusion parameters and the structural features of the cations comprising these two ionic liquids is discussed.

引用

页码：944 / 950

页数：7

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