Dicyanopyrazine-derived push-pull chromophores for highly efficient photoredox catalysis

• Main Authors: Zhao, Yu, Zhang, Chenhao, Chin, Kek Foo, Pytela, Oldřich, Wei, Guo, Liu, Hongjun, Bureš, Filip, Jiang, Zhiyong
• Other Authors: School of Physical and Mathematical Sciences
• Format: Article
• Language: English
• Published: 2015
• Subjects: DRNTU::Science::Chemistry::Physical chemistry::Catalysis
• Online Access: https://hdl.handle.net/10356/79351; http://hdl.handle.net/10220/38468
• Institution: Nanyang Technological University

Here, we report dicyanopyrazine (DPZ)-derived push–pull chromophores, easily prepared and tunable organic compounds, as new kinds of photoredox catalysts. In particular, the DPZ derivative H, containing 2-methoxythienyl as electron-donating moiety, exhibits a broad absorption of visible light with an absorption edge up to 500 nm and excellent redox properties, and has been demonstrated as a desirably active and efficient photoredox catalyst in four challenging kinds of photoredox reactions. The amount of catalyst in most reactions is less than 0.1 mol% and even 0.01 mol%, representing the lowest catalyst loading in the current photoredox organocatalysis.