A photoluminescent polymeric chain complex: synthesis and structure of [(PPh3)2Cu2(μ-I)2(μ-4,4′-bpy)]n

The synthesis and crystal structure of a new one-dimensional mixed-ligand Cu(I) coordination polymer, [(PPh3)2Cu2(μ-I)2(μ-4,4′-bpy)]n (4,4′-bpy=4,4′-bipydine) are reported. The neutral polymer consists of (PPh3)2Cu2(μ-I)2(μ-4,4′-bpy) units bridged by 4,4′-bpy to construct an infinite chain architecture. Crystal data: C23H19CuINP, Mr=530.80, Triclinic space group (P1, No. 2), a=9.2279(8) Å, b=9.4014(8) Å, c=13.3663(12) Å, α=107.445(2)°, β=106.707(2)°, γ=93.479(2)°, V=1045.8(2) Å3, Dcalc=1.686 g m−3, Z=2. The solid state of the complex is luminescent with a peak maximum at 535 nm, upon excitation at 300–400 nm at room temperature. The emission is assigned to Copper(I) to 4,4′-bpy charge transfer (MLCT).