Crystal Structure and Luminescent Properties of Diverse Cadmium(II) Coordination Polymers Based on A Semirigid Multicarboxylate Ligand

摘要: Four CdII metal coordination polymers, namely, [Cd(HL)(H2O)3]n (1), [Cd(HL)(4,4′-bpy)]n·nH2O (2), [Cd3(L)2(2,2′-bpy)3(H2O)3]n·2nH2O (3), and [Cd3(L)2(phen)2(H2O)]n·2.5nH2O (4) [H3L = 3-(3-carboxyphenoxy) phthalic acid, 4,4′-bpy 4,4′-bipyridine, 2,2′-bpy 2,2′-bipyridine, phen 1,10-phenanthroline], were synthesized structurally characterized by X-ray diffraction, elemental analysis, IR spectroscopy. Single-crystal analyses reveal that complexes 1–3 have different one-dimensional (1D) chain structures including zigzag chain, ladder helical whereas complex 4 shows a 0D trinuclear motif. These low-dimensional are further extended to 3D supramolecular networks intermolecular π–π interactions hydrogen bonds. The ligand H3L exhibits five modes: μ1-η2-chelating/μ1-η2-chelating, μ1-η2-chelating/μ1-η2-chelating/μ1-η2-chelating, μ1-η2-chelating/μ1-η2-chelating/μ1-η1-bridging, μ1-η2-chelating/μ2-η2-bridging/μ2-η1:η1-bridging, μ2-η2-chelating:η1-bridging/μ2-η2-chelating:η1-bridging/μ1-η1-bridging. Moreover, the photoluminescent properties of 1–4 studied in solid-state at room temperature.