Large and Long-term Photon Energy Storage in Diazetidines [2+2] Photocycloaddition

Overview

Journal Chem Sci

Publisher Royal Society of Chemistry

Specialty Chemistry

Date 2024 Nov 1

PMID 39483249

Authors

Han P Q Nguyen

Anurag Mukherjee

Junichi Usuba

Joshua Wan

Grace G D Han

Affiliations

Soon will be listed here.

Abstract

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.

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