Copper(<scp>I</scp>)‐Assisted Formation of an “Organic” Sandwich Structure: Structural Prerequisites for Luminescence of the Dinuclear Complexes [(μ‐Bipyrimidine){Cu(PR₃)₂}₂]X₂

Abstract

A phenyl…bpym…phenyl π interaction together with a trapping of BF counterions by solvent molecules, form the basis for the intense solid-state luminescence of 1. This conclusion follows from the fact that with a series of other arylphosphane ligands, with PF or ClO as counterions, or even in solution, luminescence from the metal-to-ligand chargetransfer excited state is either very weak or totally absent.