- Dicyanopyrazine-derived push-pull chromophores for highly efficient photoredox catalysis
-
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. the Partner Organisations 2014.
- Zhao, Yu,Zhang, Chenhao,Chin, Kek Foo,Pytela, Oldrich,Wei, Guo,Liu, Hongjun,Bures, Filip,Jiang, Zhiyong
-
p. 30062 - 30067
(2014/08/05)
-
- Syntheses of octa(2-heteroaryl) azaphthalocyanines
-
Magnesium, copper(II) and nickel(II) complexes of octasubstituted azaphthalocyanines 3-5 have been prepared from di-fur-2-yl, di-thien-2-yl and di-pyrid-2-yl pyrazine-2,3-dicarbonitriles 2. Compounds 2 were prepared in good yields from condensations of diaminomaleonitrile and the diketones 2,2′-furil, 2,2′-thenil and 2,2′-pyridil. AzaPcs 3-5 give green pyridine solutions with Q-bands at 650-670 nm and ε-values of 60 000-190 000. Wiley-VCH Verlag GmbH, 2000.
- Morkved, Eva H.,Ossletten, Hege,Kjosen, Helge,Bjorlo, Olav
-
-