Efficient Photoredox Cycles to Control Perylenediimide Self‐Assembly

Autor: Chunfeng Chen, Jorge S. Valera, Takuji B. M. Adachi, Thomas M. Hermans
Přispěvatelé: Chimie de la matière complexe (CMC), Université de Strasbourg (UNISTRA)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Université de Genève = University of Geneva (UNIGE), univOAK, Archive ouverte
Jazyk: angličtina
Rok vydání: 2022
Předmět:
Zdroj: Chemistry-A European Journal
Chemistry-A European Journal, 2022, 29 (1), ⟨10.1002/chem.202202849⟩
ISSN: 0947-6539
1521-3765
Popis: Photoreduction of perylenediimide (PDI) derivatives has been widely studied for use in photocatalysis, hydrogen evolution, photo-responsive gels, and organic semiconductors. Upon light irradiation, the radical anion (PDI⋅- ) can readily be obtained, whereas further reduction to the dianion (PDI2- ) is rare. Here we show that full 2-electron photoreduction can be achieved using UVC light: 1) in anaerobic conditions by 'direct photoreduction' of PDI aggregates, or 2) by 'indirect photoreduction' in aerobic conditions due to acetone ketyl radicals. The latter strategy is also efficient for other dyes, such as naphthalenediimide (NDI) and methylviologen (MV2+ ). Efficient photoreduction on the minute time-scale using simple LED light in aerobic conditions is attractive for use in dissipative light-driven systems and materials.
Databáze: OpenAIRE
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