Remarkable bromination and blue emission of 9-anthracenyl Pt(II) complexes.

Contrary to expectations, molecular bromine addition to trans-Pt(Br)(9-anthracenyl)(PEt3)2 does not result in Pt oxidation or Pt−C bond cleavage but rather in selective multiple bromination of the anthracenyl ligand. The resulting complexes are highly photoluminescent in the blue region due to triplet−triplet annihilation induced delayed fluorescence from the anthracene.