具有超大光穿透深度的偶氮双吡唑中的光控能量存储
Photocontrolled Energy Storage in Azobispyrazoles with Exceptionally Large Light Penetration Depths.
作者信息
Gonzalez Alejandra, Odaybat Magdalena, Le My, Greenfield Jake L, White Andrew J P, Li Xiang, Fuchter Matthew J, Han Grace G D
机构信息
Department of Chemistry, Brandeis University, 415 South Street, Waltham, Massachusetts 02453, United States.
Molecular Sciences Research Hub, Department of Chemistry, Imperial College London, White City Campus, 82 Wood Lane, London W12 0BZ, U.K.
出版信息
J Am Chem Soc. 2022 Oct 26;144(42):19430-19436. doi: 10.1021/jacs.2c07537. Epub 2022 Oct 12.
Azobispyrazole, 4pzMe-5pzH, derivatives with small terminal substituents (Me, Et, -Pr, and -Pr) are reported to undergo facile reversible photoswitching in condensed phases at room temperature, exhibiting unprecedentedly large effective light penetration depths (1400 μm of UV at 365 nm and 1400 μm of visible light at 530 nm). These small photoswitches exhibit crystal-to-liquid phase transitions upon UV irradiation, which increases the overall energy storage density of this material beyond 300 J/g that is similar to the specific energy of commercial Na-ion batteries. The impact of heteroarene design, the presence of methyl substituents, and the terminal functional groups is explored for both condensed-phase switching and energy storage. The design principles elucidated in this work will help to develop a wide variety of molecular solar thermal energy storage materials that operate in condensed phases.
据报道，具有小的末端取代基（甲基、乙基、正丙基和异丙基）的偶氮双吡唑（4-甲基-5-吡唑氢）衍生物在室温下的凝聚相中能够轻松进行可逆光开关转换，展现出前所未有的大有效光穿透深度（365nm紫外线为1400μm，530nm可见光为1400μm）。这些小型光开关在紫外线照射下会发生晶相到液相的转变，这使得该材料的整体储能密度超过300J/g，与商用钠离子电池的比能量相似。研究了杂芳烃设计、甲基取代基的存在以及末端官能团对凝聚相开关转换和能量存储的影响。这项工作中阐明的设计原则将有助于开发多种在凝聚相中运行的分子太阳能热能存储材料。
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