Two Zn(II) coordination polymers based on 1,3-di(4’-carboxyl-phenyl)benzene and N-donor coligands: syntheses, crystal structures, and luminescent properties

Two coordination polymers, {[Zn(dpb)(3-bpmp)_0.5]·1.5(DMF)}_n (1) and [Zn(dpb)(4-bpmp)]_n (2) (H₂dpb = 1,3-di(4′-carboxyl-phenyl)benzene, 3-bpmp = 1,4-bis(3-pyridylmethy)piperazine, 4-bpmp = 1,4-bis(4-pyridylmethy)piperazine and DMF = N,N-dimethylformamide), were solvothermally synthesized and characterized. Tuning the difference of N-donor ligands, we obtained 1 and 2 which display different topological nets. Complex 1 features a 6-connected topological net and 2 shows a 4-connected three-fold interpenetrated framework. Luminescent properties of 1 and 2 are investigated at room temperature.