Structure and dynamics in protic ionic liquids: a combined optical Kerr-effect and dielectric relaxation spectroscopy study.
Structure and dynamics in protic ionic liquids: a combined optical Kerr-effect and dielectric relaxation spectroscopy study.
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DOI：
10.1039/c1fd00054c
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发表时间：
2012
影响因子：
3.4
通讯作者：
D. Turton;Thomas Sonnleitner;A. Ortner;M. Walther;G. Hefter;K. R. Seddon;S. Stana;N. Plechkova;R. Buchner;K. Wynne
中科院分区：
文献类型：
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作者：
D. Turton;Thomas Sonnleitner;A. Ortner;M. Walther;G. Hefter;K. R. Seddon;S. Stana;N. Plechkova;R. Buchner;K. Wynne
离子液体的结构和动力学是不寻常的，由于离子和反离子之间的强相互作用。这些微观性质决定了对离子液体的应用如先进燃料电池至关重要的本体输运性质。利用飞秒光学克尔效应谱、介电弛豫谱和太赫兹时域谱研究了简单烷基硝酸铵质子离子液体（PIL）的太赫兹动力学和慢弛豫过程.所观察到的动态给洞察更一般的液体行为，而与玻璃形成液体的比较揭示了一个潜在的幂律衰减和弛豫速率建议超分子结构和纳米级偏析。
The structure and dynamics of ionic liquids (ILs) are unusual due to the strong interactions between the ions and counter ions. These microscopic properties determine the bulk transport properties critical to applications of ILs such as advanced fuel cells. The terahertz dynamics and slower relaxations of simple alkylammonium nitrate protic ionic liquids (PILs) are here studied using femtosecond optical Kerr-effect spectroscopy, dielectric relaxation spectroscopy, and terahertz time-domain spectroscopy. The observed dynamics give insight into more general liquid behaviour while comparison with glass-forming liquids reveals an underlying power-law decay and relaxation rates suggest supramolecular structure and nanoscale segregation.