光异构化
异构化
偶氮苯
结晶
烷基
放热反应
焓
相(物质)
分子
化学
光化学
潜热
化学工程
材料科学
物理化学
有机化学
热力学
催化作用
物理
工程类
作者
Jianming Gao,Yiyu Feng,Wenyu Fang,Hui Wang,Jing Ge,Xiaoyu Yang,Huitao Yu,Mengmeng Qin,Wei Feng
出处
期刊:Energy & environmental materials
日期:2023-03-29
被引量:6
摘要
Photoisomerization‐induced phase change are important for co‐harvesting the latent heat and isomerization energy of azobenzene molecules. Chemically optimizing heat output and energy delivery at alternating temperatures are challenging because of the differences in crystallizability and isomerization. This article reports two series of asymmetrically alkyl‐grafted azobenzene (Azo‐g), with and without a methyl group, that have an optically triggered phase change. Three exothermic modes were designed to utilize crystallization enthalpy (∆ H c ) and photothermal (isomerization) energy (∆ H p ) at different temperatures determined by the crystallization. Azo‐g has high heat output (275–303 J g −1 ) by synchronously releasing ∆ H c and ∆ H p over a wide temperature range (−79 °C to 25 °C). We fabricated a new distributed energy utilization and delivery system to realize a temperature increase of 6.6 °C at a temperature of −8 °C. The findings offer insight into selective utilization of latent heat and isomerization energy by molecular optimization of crystallization and isomerization processes.
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