1D CuI coordination polymers based on triphenylarsine and N,N'-ditopic co-ligands: synthesis, crystal structure and TADF properties

1D coordination polymers [Cu2I2(AsPh3)2(L)]n (L = 4,4'-bi-pyridine, pyrazine) were synthesized via the reaction of CuI with AsPh3 and N,N'-ditopic co-ligand s L. At ambient temperature, these polymers exhibit short-lived (2.3–3.2 μs) thermally activated delayed fluorescence (TADF) with max at 530 nm (L = 4,4'-bipyridine) and 605 nm (L = pyrazine) and quantum efficiency up to 45%.