Cyclometalated luminescent platinum(ii) complexes of dissymmetrical 2,2′:4′,2′′-terpyridine and its self-assembled dimer presenting Pt–Ag dative bonds

Abstract

A series of cyclometalated (N^C^N) Pt(II)-platinum complexes featuring a terpyridine ligand with a non-coordinating nitrogen atom and a Pt–C bond was synthesized. In the presence of Ag⁺, the bis(isonitrile)Pt(II) complex formed a remarkable self-assembled helicoidal dimer stabilized by coordination of Ag(I) and metallophilic Pt–Ag interactions. Its assembly was observed in the solid state and maintained in solution. All complexes show strong luminescence and multiple emitting states, which could be rationalized based on solid state X-ray structures and coordinating environment.