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Ionic Liquids–Cobalt(II) Thermochromic Complexes: How the Structure Tunability Affects “Self-Contained” Systems
ACS Sustainable Chemistry & Engineering ( IF 7.1 ) Pub Date : 2021-03-10 , DOI: 10.1021/acssuschemeng.0c08586 Floriana Billeci 1, 2 , H. Q. Nimal Gunaratne 2, 3 , Peter Licence 4 , Kenneth R. Seddon 2, 5 , Natalia V. Plechkova 2, 5 , Francesca D’Anna 1
ACS Sustainable Chemistry & Engineering ( IF 7.1 ) Pub Date : 2021-03-10 , DOI: 10.1021/acssuschemeng.0c08586 Floriana Billeci 1, 2 , H. Q. Nimal Gunaratne 2, 3 , Peter Licence 4 , Kenneth R. Seddon 2, 5 , Natalia V. Plechkova 2, 5 , Francesca D’Anna 1
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With the aim of obtaining thermochromic systems with potential applications in solar energy storage, we evaluated the behavior of some sugar-based ionic liquids (ILs)–Co(NTf2)2 complexes, in IL solution, as a function of temperature. Different structural changes on the cation, the nature of the anion, and the nature of the IL used as the solvent were considered. The analysis of the above factors was carried out through a combined approach of different techniques, that is, variable temperature UV–vis and NMR spectroscopies, conductivity, and thermal gravimetric analysis. The thermochromic systems were analyzed both as solutions and as thin films, and the data collected highlight the defining role played by both the cation structure and the solvent nature in determining their performance. Most of the investigated systems show a chromogenic transition from pink to blue, occurring in a temperature range suitable for practical applications (40–60 °C). Interestingly, when embedded in a polymeric matrix, thin films with high recyclability and long life are also described.
中文翻译：
离子液体–钴（II）热致变色配合物：结构可调性如何影响“自包含”系统
为了获得在太阳能存储中具有潜在应用的热致变色系统，我们评估了一些糖基离子液体（ILs）–Co（NTf 2）2的行为。IL溶液中的配合物随温度的变化。考虑了阳离子的不同结构变化，阴离子的性质以及用作溶剂的IL的性质。上述因素的分析是通过不同技术的组合方法进行的，即可变温度紫外可见和核磁共振谱，电导率和热重分析。对热致变色体系进行了溶液和薄膜分析，所收集的数据突出了阳离子结构和溶剂性质在确定其性能方面所起的决定性作用。大多数研究过的系统显示出从粉红色到蓝色的发色转变，发生在适合实际应用的温度范围内（40–60°C）。有趣的是，当嵌入聚合物基体中时，
更新日期：2021-03-22
中文翻译：
离子液体–钴（II）热致变色配合物：结构可调性如何影响“自包含”系统
为了获得在太阳能存储中具有潜在应用的热致变色系统，我们评估了一些糖基离子液体（ILs）–Co（NTf 2）2的行为。IL溶液中的配合物随温度的变化。考虑了阳离子的不同结构变化，阴离子的性质以及用作溶剂的IL的性质。上述因素的分析是通过不同技术的组合方法进行的，即可变温度紫外可见和核磁共振谱，电导率和热重分析。对热致变色体系进行了溶液和薄膜分析，所收集的数据突出了阳离子结构和溶剂性质在确定其性能方面所起的决定性作用。大多数研究过的系统显示出从粉红色到蓝色的发色转变，发生在适合实际应用的温度范围内（40–60°C）。有趣的是，当嵌入聚合物基体中时，
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