Efficient Photoredox Cycles to Control Perylenediimide Self-Assembly.

Autor: Chen C; Université de Strasbourg, CNRS, UMR7140, 4 Rue Blaise Pascal, 67081, Strasbourg, France., Valera JS; Université de Strasbourg, CNRS, UMR7140, 4 Rue Blaise Pascal, 67081, Strasbourg, France., Adachi TBM; Department of Physical chemistry Sciences II, 30 Quai Ernest Ansermet, 1211, Genève 4, Switzerland., Hermans TM; Université de Strasbourg, CNRS, UMR7140, 4 Rue Blaise Pascal, 67081, Strasbourg, France.
Jazyk: angličtina
Zdroj: Chemistry (Weinheim an der Bergstrasse, Germany) [Chemistry] 2023 Jan 02; Vol. 29 (1), pp. e202202849. Date of Electronic Publication: 2022 Nov 10.
DOI: 10.1002/chem.202202849
Abstrakt: 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 (PDI 2- ) 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 (MV 2+ ). 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.
(© 2022 The Authors. Chemistry - A European Journal published by Wiley-VCH GmbH.)
Databáze: MEDLINE
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