Light-Induced Charge Separation in Covalently Linked BODIPY-Quinone-Alkyne Dyads

in: Chemistry-A European Journal (2024)
Knoll, Sebastian; Zens, Clara; Maisuradze, Tamar; Schmidt, Heiner; Kupfer, Stephan; Zedler, Linda; Dietzek-Ivanšić, Benjamin; Streb, Carsten
Visible light-induced charge separation and directional charge transfer are corner stones for artificial photosynthesis and the generation of solar fuels. Here, we report synthetic access to a series of noble metal-free donor-acceptor dyads based on bodipy light-absorbers and redox-active quinone/anthraquinone charge storage sites. Peripheral functionalization of the quinone/anthraquinone units with alkynes primes the dyads for integration into a range of light-harvesting systems, e.g.,by Cu-catalyzed cyclo additions (CLICKchemistry) or Pd-catalyzed C-C cross-coupling reactions. Initial photophysical, electrochemical and theoretical analyses reveal the principal processes during the light-induced charge separation in the reported dyads.

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