halides with 11 different nucleophiles using the polymeric carbon nitride CN-OA-m as a photocatalyst under the same reaction conditions (same pre-catalyst, same temperature, same solvent, same base, Scheme 1C). 71 This versatile, semiheterogeneous catalyst system enabled the formation of four different types of carbon-heteroatom bonds (C-N, C-O, C-S, C-Se) and exhibited a broad substrate scope (more than 200 examples, with yields up to 94%).