2025/12/11 by Qianfeng Qiu, Junichi Usuba, Wai Lean Koay +5 · 1 voice
Chemistry · Materials Science · #Cyclopropane Reaction Mechanisms #Photochromic and Fluorescence Chemistry #Radical Photochemical Reactions
paper · pdf · doi:10.1039/d5sc07833d
openalex created_date 2025/12/11 · openalex publication_date 2025/12/11 · openalex updated_date 2026/06/22
-palladation, the resulting Pd(ii) complexes exhibit strong charge-transfer absorption bands in the visible range (430-570 nm) and adopt a clamshell geometry that preorganizes the reactive alkenes in close spatial proximity. This unique coordination environment facilitates fast, near-quantitative, and reversible [2 + 2] photocycloaddition in both solution and amorphous solid state under the irradiation of green light or standard sunlight. The cycloadducts formed are stable, isolable solids with long thermal half-lives (up to 504 days at 298 K), enabling long-term energy storage. The combination of visible-light responsiveness, robust reversibility, and solid-state reactivity demonstrates the potential of transition metal complexes as a promising molecular platform for molecular solar thermal energy storage applications.