A cross-coupling strategy for the synthesis of dimetallic assemblies containing mixed bipyridine–terpyridine bridging ligands: luminescence and energy transfer properties

Abstract

Tris-bidentate complexes of the form [Ir(N^C)₂(N^N)]⁺ and [Ru(N^N)₃]²⁺ incorporating a boronic acid substituent (N^C = 2-phenylpyridyl, N^N = a 2,2′-bipyridyl ligand), are cross-coupled with bromo-substituted bis-terpyridyl ruthenium and iridium complexes to generate heterometallic assemblies comprising bpy-ϕ_n-tpy bridges; they display efficient energy transfer from Ir(III) to Ru(II).