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MECHANISM OF ACTION AND CATALYTIC EFFICIENCY OF DICYANOPYRAZINE PHOTOREDOX CATALYST

Authors: Ludwig Miroslav | Burešová Zuzana | Grygarová Monika | Perglová Pavlína | Bureš Filip

Year: 2025

Type of publication: ostatní - přednáška nebo poster

Page from-to: nestránkováno

Titles:

Language	Name	Abstract	Keywords
eng	MECHANISM OF ACTION AND CATALYTIC EFFICIENCY OF DICYANOPYRAZINE PHOTOREDOX CATALYST	Visible light is considered a valuable and eco-friendly tool for performing radicaltransformations. In photoredox catalysis, the energy of light is combined with a light-absorbingmolecule (photoredox catalyst) to achieve its excited state (more potent redox agent) and to enableradical reactions on unprecedented substrates with high selectivity under mild reaction conditions. Historically, organic catalysts such as xanthene dyes, acridinium salts, flavins, and(di)cyano(hetero)arenes have demonstrated remarkable activity in numerous photoredox transformations. In 2014, X-shaped dicyanopyrazine (DPZ) photocatalyst has been synthesized in our working group and subsequently its multigram synthesis and potential applications have been explored. The recent photophysical and theoretical study disclosed DPZ’s fundamental mechanism of action and its catalytic efficiency. Hence, this contribution will discuss the fundamental photophysical properties, including optical properties, electrochemistry, ground and excited state reduction potentials, and their correlation to the DPZ’s catalytic activity in selected photoredox reactions such as crosscoupling, deuteration of aldehydes, and annulation.	dicyanopyrazine; photoredox catalysis; mechanism