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Abstract: Three 3D Ln(III)–Zn(II) 3d-4f heterometallic coordination polymers (HCPs) constructed from the coligands 3-amino-1H-1,2,4-triazole and oxalate, {[Ln2Zn19(atz)18(ox)9(Cl)8]·17H2O}n(Ln=Eu 1, Gd 2, Tb 3, Hatz=3-amino-1H-1,2,4-triazole, ox=oxalic acid) have been synthesized under hydrothermal conditions and characterized by elemental analysis, FT-IR, TG analysis and X-ray diffraction. X-ray diffraction analysis reveals that these complexes are isostructural and feature 3D pillar-layered coordination frameworks constructed by the linkages of 2D layers and 1D zigzag chains, possessing a 5-nodal net topology with Schläfli symbol of {32;52;62}3{33;44;57;65;72}6{33;45;55;6;7}6{36;415;56;6}2{53}4. In addition, the magnetic property of 2 and the luminescence properties of 1 and 3 were also investigated. [Copyright &y& Elsevier]

Abstract: Two different types of novel lanthanide coordination polymers constructed from 5-nitroisophthalic acid, and picolinic acid as auxiliary ligand, namely, {[Ln2(nip)2(pic)2(H2O)]}n (type I, Ln=Pr 1, Nd 2, Sm 3, Eu 4, and H2nip=5-nitroisophthalic acid, Hpic=picolinic acid), and {[Ln4(nip)5(pic)2(H2O)2]·2H2O}n (type II, Ln=Tb 5, Dy 6, Ho 7, Er 8), have been hydrothermally synthesized and characterized by IR, elemental analysis, thermogravimetric analysis (TGA), single-crystal X-ray diffraction analyses and powder X-ray diffraction (PXRD). Complexes 1–4 (type I) are isostructural and the infinite 1D Sm-carboxylate chains are bridged by pia ligands to form 2D sheets, such sheets are further united together to generate a 3D supramolecular structure. Complexes 5–8 (type II) are isostructural and the infinite 1D Tb–carboxylate chains are bridged by pia ligands to form 2D sheets, such sheets are further united together to generate a 3D supramolecular structure. Furthermore, the luminescence properties of compounds 4 and 5 have also been studied. [Copyright &y& Elsevier]

In this work, we obtained a highly rare three-dimensional Zn(II) MOF, namely [Zn2(BTC)2(L)][(Me2NH2)2]·DMF (BTC3− =1,3,5-benzenetricarboxylate, L=N1,N4-bis(pyridin-3-ylmethyl)cyclohexane-1,4-dicarboxamide), and Me2NH2 =dimethylamine cation) by solvo(hydro)thermal method. This polymer was characterized by single-crystal X-ray diffraction, thermogravimetry and solid-state luminescence analysis. The outstanding structural feature of it is (3, 4)-connected net with unprecedented (6·82)(6·85)(62 ·10)(62 ·83 ·10) topology and self-penetrating motif. [ABSTRACT FROM AUTHOR]

Abstract: Four novel functional supramolecular metal–organic coordination polymers, [Cd2Cl3(IP)2(NIPH)2](1), [Zn2(IP)2(μ2-SO4)2(NIPH)2]·2H2O(2), [Cd(IP)2(BPDC)](3), [Zn2(IP)2(NDC)2](4) (IP=1-H-imidazo[4,5-f][1,10]-phenanthroline, H2NIPH=5-nitro-isophthalic acid, H2BPDC=4,4′-biphenyldicarboxylic acid, H2NDC=2,6-naphthalenedicarboxylic acid), have been obtained through three types of dicarboxylate linkers. All the four compounds are extended into a 3-D supramolecular framework by hydrogen bonds or weak aromatic interactions. The different structures demonstrate the effect of the dicarboxylate ligands on the formation of such coordination architectures. Compound 1 is a 1-D double-stranded loop-like chain with repeated [Cd4(Cl)4]4+ units connected by H2NIPH ligands. In compound 2, there are two indie 1D zigzag chains jointed by sulfate anions with μ2-bridging mode. With different metal centers, compounds 1 and 2 hold different crystal structures. With different auxiliary dicarboxylate ligands, compounds 3 and 4 exhibit disparate 1D chains. The fluorescence property and thermal stability of all complexes are also investigated. [Copyright &y& Elsevier]

Abstract: Six novel functional metal–organic frameworks, namely, [CdCl(IP)(Hpydc)(H2O)]·2H2O (1), [Cd(IP)(H2imdc)]Cl (2), [Cd(IP)2(H2O)2](1,5-nds)·2H2O (3), [Co(IP)(H2O)4](1,5-nds)·H2O (4), [Zn(IP)(μ2-SO4)(H2O)]·H2O (5), [Zn(IP)(SO4)(H2O)3] (6) (IP = 1-H-imidazo[4,5-f][1,10]-phenanthroline, H2pydc = pyridine-2,6-dicarboxylic acid, H3imdc = imidazole-4,5-dicarboxylic acid, 1,5-nds = 1,5-naphthanlenedisulfonate), were synthesized by controlling auxiliary ligands, metal centers and solvents. In compound 1, Cd(II) is chelated by IP and Hpydc ligands, forming 0D→3D supramolecular structure. Compound 2 is a 1D chain with repeated [Cd(IP)]2+ units connected by H2imdc ligands. With different metal centers, compounds 3 and 4 possess different crystal structures. With solvents regulated, compounds 5 and 6 exhibit distinct structures. In compound 5, sulfate anions show μ2-bridging mode, which results in the formation of 1D chain. In compound 6, only one oxygen atom from sulfate anion coordinates to the metal center, resulting in discrete repeated units. The luminescent properties of 1, 2, 3, 5, 6 and thermal stabilities of all compounds were measured. [Copyright &y& Elsevier]