Syntheses, structures, magnetic and luminescence properties of a series of coordination polymers constructed from 1,4-naphthalenedicarboxylate and N-donor ligands

Abstract

Five new coordination polymers constructed from 1,4-naphthalenedicarboxylate and N-donor ligands including [Cd₂(1,4-ndc)₂(bpy)₂]·0.5H₂O (1), [Cd(1,4-ndc)(phen)]·0.5H₂O (2), [Cu₂(1,4-ndc)₂(L1)]·H₂O (3), [Co₃(H₂O)₂(1,4-ndc)₄(HL2)₂] (4), and [Cd₂(NO₃)₂(1,4-ndc)(L3)₂]·H₂O (5) have been synthesized under hydrothermal conditions and characterized by elemental analysis, infrared spectroscopy, powder X-ray diffraction and single crystal X-ray diffraction. Compounds 1 and 2 are 2D layers with 4-connected (4⁴·6²) topology. Compound 3 is a 3D two-fold interpenetrating pcu network based on a binuclear cluster. Compound 4 exhibits an eight-connected bcu network constructed by a trinuclear cluster. Compound 5 is a 3D two-fold interpenetrating network with uninodal 4-connected cds (CdSO₄) topology. Furthermore, the magnetic properties of compounds 3 and 4 were investigated and the photoluminescence properties of compounds 1, 2 and 5 show that the three compounds have strong emission under λ_ex = 320 nm at room temperature.