Phase transition and ionic transport mechanism of (C4H9)4NI
Phase transition and ionic transport mechanism of (C4H9)4NI
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DOI：
10.1016/j.cplett.2005.08.055
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发表时间：
2005-10-03
影响因子：
2.8
通讯作者：
Hattori, T
中科院分区：
文献类型：
--
作者：
Asayama, R;Kawamura, J;Hattori, T
采用x射线衍射、DSC、离子电导率和高分辨率质子核磁共振光谱研究了四丁基碘化铵（C4H9）(4)NI （TBAI）的相变和离子输运。在391 K （S = 95.2 J/mol K）的温度下，TBAI从有序相I转变为旋转无序塑性相II。在相变点附近，I相的离子电导率逐渐增大。另一方面，质子核磁共振扩散系数随温度升高而减小。观察到的TBA阳离子的快速扩散对观察到的该材料的离子电导率有重要贡献。(c) 2005 Elsevier B.V.版权所有
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.