Journal of Molecular Liquids ( IF 6 ) Pub Date : 2021-09-14 , DOI: 10.1016/j.molliq.2021.117553 Yuqing Fei 1, 2 , Zhengjian Chen 1, 2 , Jiliang Zhang 1, 2 , Mingyuan Yu 2 , Jing Kong 2 , Zhisheng Wu 3 , Jun Cao 4 , Jiaheng Zhang 5
Thiazolium salts are structurally analogous to the most common imidazolium-based ionic liquids (ILs), and are supposed to be a new class of ILs. However, there are up to now only a few reports and absence of systematic study on thiazolium ILs. In this work, several thiazolium-based ILs were prepared, characterized and comparatively studied. Most of the thiazolium ILs are liquid at room temperature, with melting points below 43.0 °C. Good thermal stability was observed for thiazolium ILs, resulting in thermal decomposition temperatures up to 264 ∼ 358 °C. In comparison with the conventional imidazolium ILs, thiazolium ILs exhibit moderate density, refractive index and surface tension, which all generally decrease with temperature. According to the temperature-dependent viscosity and conductivity, thiazolium ILs follow fractional Walden’s rule, indicating strong ion-ion coupling. Besides, thiazolium ILs display relatively narrow electrochemical window (3.1 ∼ 4.0 V).
中文翻译:
噻唑鎓离子液体:合成、表征和理化性质
噻唑鎓盐在结构上类似于最常见的基于咪唑鎓的离子液体 (IL),并且被认为是一类新的 IL。然而,目前关于噻唑鎓离子液体的报道较少,缺乏系统研究。在这项工作中,制备、表征和比较研究了几种基于噻唑鎓的离子液体。大多数噻唑鎓离子液体在室温下为液体,熔点低于 43.0 °C。噻唑鎓离子液体具有良好的热稳定性,热分解温度高达 264 ~ 358 °C。与传统的咪唑离子液体相比,噻唑离子液体具有适中的密度、折射率和表面张力,它们通常都随着温度的升高而降低。根据温度依赖的粘度和电导率,噻唑鎓离子液体遵循分数瓦尔登定律,表明强离子-离子耦合。此外,噻唑鎓离子液体显示出相对较窄的电化学窗口(3.1 ∼ 4.0 V)。