Ionic conductivity of deep eutectic solvents: the role of orientational dynamics and glassy freezing.
Ionic conductivity of deep eutectic solvents: the role of orientational dynamics and glassy freezing.
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DOI：
10.1039/c9cp00742c
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发表时间：
2019-02
期刊：
影响因子：
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通讯作者：
D. Reuter;C. Binder;P. Lunkenheimer;A. Loidl
中科院分区：
文献类型：
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作者：
D. Reuter;C. Binder;P. Lunkenheimer;A. Loidl
我们利用宽带介电谱对三种典型的低共熔溶剂（乙醇、甘油和 reline）的重新取向弛豫动力学和离子电荷传输进行了彻底的检查。我们的实验涵盖了从低粘度液体到深度过冷状态的广泛温度范围，使我们能够研究玻璃态冻结对这些系统中离子电荷传输的重大影响。此外，我们还提供了这些材料中的离子电导率与重新取向偶极运动紧密耦合的证据，在寻找针对电化学应用优化的低共熔溶剂时应考虑这一点。
We have performed a thorough examination of the reorientational relaxation dynamics and the ionic charge transport of three typical deep eutectic solvents, ethaline, glyceline and reline, by using broadband dielectric spectroscopy. Our experiments cover a broad temperature range from the low-viscosity liquid down to the deeply supercooled state, allowing us to investigate the significant influence of glassy freezing on the ionic charge transport in these systems. In addition, we provide evidence for a close coupling of the ionic conductivity in these materials to reorientational dipolar motions, which should be considered when searching for deep eutectic solvents optimized for electrochemical applications.