Arylazopyrazoles for Long-Term Thermal Energy Storage and Optically Triggered Heat Release below 0 °C
Arylazopyrazoles for Long-Term Thermal Energy Storage and Optically Triggered Heat Release below 0 °C
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DOI：
10.1021/jacs.0c00374
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发表时间：
2020-05-13
影响因子：
15
通讯作者：
Han, Grace G. D.
中科院分区：
文献类型：
--
作者：
Gerkman, Mihael A.;Gibson, Rosina S. L.;Han, Grace G. D.
基于四种核心结构（4pzMe、3 pzH、4pzH和4pzH-F2）并用十二烷酸酯基团官能化的芳基偶氮吡唑衍生物被证明在其亚稳Z异构体液相中储存热能，并首次通过在-30 ℃下的光学触发结晶来释放能量。三个热存储-释放计划被发现涉及不同的激活方法（光学，热，或组合），用于生成能够存储热能的液态Z异构体。可见光照射诱导的选择性结晶的液相通过Z-到-E异构化，和潜热存储在液体Z异构体保存超过2周，除非光学触发。在化合物中储存了高达92 kJ/mol的热能，证明了Z异构体在高温下的显着热稳定性和在低于0 ℃的温度下的液相稳定性。
Arylazopyrazole derivatives based on four core structures (4pzMe, 3pzH, 4pzH, and 4pzH-F2) and functionalized with a dodecanoate group were demonstrated to store thermal energy in their metastable Z isomer liquid phase and release the energy by optically triggered crystallization at -30 degrees C for the first time. Three heat storage-release schemes were discovered involving different activation methods (optical, thermal, or combined) for generating liquid-state Z isomers capable of storing thermal energy. Visible light irradiation induced the selective crystallization of the liquid phase via Z-to-E isomerization, and the latent heat stored in the liquid Z isomers was preserved for longer than 2 weeks unless optically triggered. Up to 92 kJ/mol of thermal energy was stored in the compounds, demonstrating remarkable thermal stability of Z isomers at high temperatures and liquid-phase stability at temperatures below 0 degrees C.