Phase transition and ionic transport mechanism of (C4H9)4NI

被引：26
作者：
Asayama, R
Kawamura, J
Hattori, T
机构：
[1] Tohoku Univ, Inst Multidsciplinary Res Adv Mat, Aoba Ku, Sendai, Miyagi 9808577, Japan
[2] Tokyo Univ Sci, Dept Appl Phys, Tokyo 1628601, Japan
来源：
CHEMICAL PHYSICS LETTERS | 2005年 / 414卷 / 1-3期
关键词：
D O I：
10.1016/j.cplett.2005.08.055
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：
Phase transition and ionic transport in tetrabutylammoniumiodide (C4H9)(4)NI (TBAI) was investigated using X-ray diffraction, DSC, ionic conductivity and high resolution proton NMR spectroscopy. The TBAI exhibited a solid state phase transition at 391 K of OF Delta S = 95.2 J/mol K from an ordered phase I to a rotationally disordered plastic phase II. Ionic conductivity in phase I increased gradually near the phase transition point. On the other hand, proton NMR diffusion coefficients showed decrease with raising temperature. The observed fast diffusion of the TBA cation has significant contribution to the observed ionic conductivity of this material. (c) 2005 Elsevier B.V. All rights reserved.
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页码：87 / 91
页数：5
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