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Solvothermal condition reaction of Ln(NO3)3 ⋅ 6H2O (Ln = Er, Eu) with 5-nitroisophthalate (Nipt2–) and mononuclear macrocyclic oxamide complex ML (M = Ni or Cu) afforded two new 3d–4f heterometallic coordination polymers [Er2(CuL)2(Nipt)3(H2O)] ⋅ 0.75H2O (I) and [Eu2(NiL)2(Nipt)3(H2O)] ⋅ H2O (II) (ML, H2L = 2,3-dioxo-5,6,14,15-dibenzo-1,4,8,12-tetraazacyclo-pentadeca-7,13-dien; H2Nipt = 5-nitroisophthalic acid). Their structures have been characterized by elemental analyses, FT-IR, UV, and single-crystal X-ray diffraction analyses (CIF files CCDC nos. 1880429 (I), 1880430 (II)). Both complexes I and II exhibit a 2D dimensional heterometallic framework with 3,3,4,5-connected (3.4.5)(32.42.5.63.72)(42.63.8)(42.6) topology, and adjacent 2D structures are connect together with intermolecular O–H⋅⋅⋅O and C–H⋅⋅⋅O hydrogen bonds to form a 3D superamolecular architectures. Moreover, the visible and near-infrared luminescence properties of the compound I are also discussed. [ABSTRACT FROM AUTHOR]

Abstract: Two novel 3d-4f coordination polymers [Ln(NiL)(Nipt)(C2O4)0.5 · H2O] · H2O (Ln = Er (I), Eu (II) (H2L = 2,3-dioxo-5,6,14,15-dibenzo-1,4,8,12-tetraazacyclopentadeca-7,13-dien; H2Nip = 5-nit-roisophthalic acid) were obtained by using 5-nitroisophthalate and mononuclear macrocyclic oxamide complex NiL as co-ligand to react with Ln(NO3)3 ⋅ 6H2O (Ln = Er, Eu) under solvothermal condition, and characterized by single crystal X-ray diffraction (CIF files CCDC nos. 1587618 (I) and 1587619 (II)). Two complexes are isostructural structure and exhibit a two-dimensional network architecture formed by [Ln(III)Ni(II)] units via the oxamide, 5-nitroisophthalate and oxalate bridges, and adjacent 2D structures are linked together with C-H⋅⋅⋅O and O-H⋅⋅⋅O intermolecular hydrogen bonds to form a 3D superamolecular architectures. The fluorescence properties of I and II are also characterized. [ABSTRACT FROM AUTHOR]

One novel heterometallic trinuclear complex of macrocyclic oxamide [Ni(CuL) 2(HBTC)H 2O] ( I) (H 2L = 2,3-dioxo-5,6,14,15-dibenzo-1,4,8,12-tetraazacyclopentadeca-7,13-dien; H 3BTC = 1,3,5-benzenetricarboxylic acid) has been solvothermally synthesized and structurally characterized by elemental analysis, IR spectroscopy, XRD, and single-crystal X-ray diffraction. The crystals crystallize in the monoclinic system, space group P2 1/ c, a = 11.435(3), b = 20.646(5), c = 18.430(5) Å, β = 94.131(4)°. The structure of I has oxamido-bridged trinuclear [Cu 2IINi II] units and consists of two-dimensional supramolecular architecture formed by strong intermolecular hydrogen bonds. Furthermore, the magnetic properties of complex I was investigated and discussed in detail. [ABSTRACT FROM AUTHOR]