Photon Energy Storage in Strained Cyclic Hydrazones: Emerging Molecular Solar Thermal Energy Storage Compounds
Photon Energy Storage in Strained Cyclic Hydrazones: Emerging Molecular Solar Thermal Energy Storage Compounds
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DOI：
10.1021/jacs.2c05384
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发表时间：
2022-07-08
影响因子：
15
通讯作者：
Han, Grace G. D.
中科院分区：
文献类型：
--
作者：
Qiu, Qianfeng;Yang, Sirun;Han, Grace G. D.
到目前为止，hydrazone Photoswitches的Z和E异构体之间的通常很小的Gibbs自由能差已排除在光子能量存储应用中的使用。在这里，我们报告了一系列循环和无环氢酶，它们具有不同程度的环应变，因此E异构体的稳定性。光诱导的异构化和同时的循环氢酶从晶体到液相的相变导致大量能量的储存，可与偶氮苯衍生物相当。我们证明，大环光色设计与相变相结合是分子太阳能热储能应用的有前途的策略。
The generally small Gibbs free energy difference between the Z and E isomers of hydrazone photoswitches has so far precluded their use in photon energy storing applications. Here, we report on a series of cyclic and acyclic hydrazones, which possess varied degrees of ring strain and, hence, stability of E isomers. The photoinduced isomerization and concurrent phase transition of the cyclic hydrazones from a crystalline to a liquid phase result in the storage of a large quantity of energy, comparable to that of azobenzene derivatives. We demonstrate that the macrocyclic photochrome design in combination with phase transition is a promising strategy for molecular solar thermal energy storage applications.