Introducing intramolecular, interligand arene–alkynyl π-interactions into heteroleptic [Cu(N^N)(P^P)]⁺complexes

Abstract

The synthesis and characterization of six new heteroleptic copper(I) compounds incorporating wide bite-angle bisphosphanes (POP = oxydi(2,1-phenylene)]bis(diphenylphosphane), xantphos = (9,9-dimethyl-9H-xanthene-4,5-diyl)bis(diphenylphosphane) combined with 6,6'-di(but-3-yn-1-yl)-2,2'-bipyridine (1), 6-(but-3-yn-1-yl)-6'-methyl-2,2'-bipyridine (2) or 6-(but-3-yn-1-yl)-2,2'-bipyridine (3) are...

Introducing sterically demanding substituents and π–π-interactions into [Cu(P^P)(N^N)]+ complexes

“…A noteworthy property of certain families of copper(I) based coordination compounds is that they can exhibit thermally activated delayed fluorescence (TADF), enabling enhanced photoluminescence quantum yields (PLQYs). [1][2][3][4][5][6][7] Copper(I) complexes of the type [Cu(P^P)(N^N)] + (N^N = chelating diimine ligand and P^P = bidentate bis( phosphane) ligand) are of interest for use in light-emitting electrochemical cells (LECs). 6 McMillin et al first reported the photoluminescence of [Cu (PPh 3 ) 2 (bpy)] + complexes (bpy = 2,2′-bipyridine) following a metal-to-ligand charge-transfer (MLCT) excitation 8 with subsequent studies employing [Cu(N^N) 2 ] + and [Cu(P^P)(N^N)] + emitters.…”