Nguyen Han P Q, Mukherjee Anurag, Usuba Junichi, Wan Joshua, Han Grace G D
Department of Chemistry, Brandeis University 415 South Street Waltham MA 02453 USA
Chem Sci. 2024 Oct 22;15(45):18846-54. doi: 10.1039/d4sc05374e.
We report a series of -functionalized phenylbenzoxazoles that offer remarkable energy storage, exceeding 300 J g, for the first time among intermolecular cycloaddition-based molecular solar thermal energy storage systems. The [2 + 2] photocycloaddition of phenylbenzoxazoles generates diazetidine cycloadducts that store energy for up to 23 years in the solid state and release energy upon triggered cycloreversion. The solid-state phase transition contributes to increasing overall energy storage densities, and the dearomative cycloaddition process is revealed to be critical for maximizing the intrinsic energy storage capacities. The solvent-assisted cycloreversion is also used to accelerate the energy release from the emerging molecular scaffold.
我们报道了一系列官能化的苯基苯并恶唑，在基于分子间环加成的分子太阳能热能存储系统中，首次实现了超过300 J/g的卓越储能性能。苯基苯并恶唑的[2 + 2]光环加成反应生成二氮杂环丁烷环加成产物，这些产物在固态下可储存能量长达23年，并在触发环反转时释放能量。固态相变有助于提高整体储能密度，且发现脱芳构化环加成过程对于最大化固有储能能力至关重要。溶剂辅助的环反转也被用于加速新兴分子支架的能量释放。
