A Prussian blue/carbon dot nanocomposite as an efficient visible light active photocatalyst for C–H activation of amines

A Prussian blue/carbon dot (PB/CD) nanocomposite was synthesised and used as a visible-light activephotocatalyst for the oxidative cyanation of tertiary amines to α-aminonitriles by using NaCN/acetic acidas a cyanide source and H2O2 as an oxidant. The developed photocatalyst afforded high yields of productsafter 8 h of visible light irradiation at room temperature. The catalyst was recycled and reused severaltimes without any significant loss in its activity.