Lead-free Cs2AgBiBr6 double perovskite microcrystals for effective visible-light photocatalytic thio/selenocyanation

An efficient lead-free double perovskite Cs 2 AgBiBr 6 catalyzed C-3 thio/selenocyanation of indoles under visible-light have been developed, in which the photocatalyst can be recycled at least five times without a substantial decrease in efficiency.