Construction of new 1 D and 2D coordination polymers generated from rigid N,N′-bis(4-pyridylmethylene)-1,5-naphthalenediamine ligand: Syntheses, crystal structures and luminescence properties

Treatment of N,N'-bis(4-pyridylmethylene)-1,5-naphthalenediamine (L) with Pb(OAc)(2)/KBr, Cu(acac)(2), and Cu(OAc)(2) afforded three new coordination polymers [Pb(mu-L)(mu-Br)(2)](n), (1), [Cu(mu-L)(acac)(2)](n) (2), and [cu(2)(mu-L)(mu-OAc)(4)](n), (3). These coordination polymers have been structurally characterized by single crystal X-ray diffraction. Compound 1 has a 2D sheet structure in which the lead(II) centers are bridged by both L and bromide ligands. Compound 2 adopts a 10 neutral coordination chain and consists of bis (2,4-pentanedionato) copper(II) units connected by rigid bridging L ligands. The structure of compound 3 also adopts a 1D neutral coordination chain in which two copper centers are connected through four acetate groups to form a Cu(OAc)(4)Cu paddle-wheel-type cage between two bridging L ligands. The FrIR spectra, thermal behavior and photoluminescence properties of these coordination polymers have also been investigated. (C) 2016 Elsevier B.V. All rights reserved.