Ying-Liang Liu

A series of novel 2D heterometallic 3d–4f heptanuclear complexes based on the linkages of Ln2(ina)6 chains and [Cu(CN)] chains

Five novel 2D heterometallic coordination polymers, Ln2Cu5(ina)6(CN)5.5·4H2O [Ln = Nd (1), Eu (2), Tb (3), Gd (4), Sm (5); ina = isonicotinic acid], have been synthesized under hydrothermal conditions and characterized by elemental, infrared, thermogravimetric and X-ray diffraction analyses. These complexes are constructed of Ln2(ina)6 chains, Cu–CN–Cu, and CN–Cu–CN chains, which represent the first examples of 3D coordination compounds created by using a combination of metal–cyanide chains, lanthanide–carboxylate linear chains and O–H⋯N hydrogen bonds.

A new family of 3D heterometallic 3d–4f organodisulfonate complexes based on the linkages of 2D [Ln(nds)(H2O)]+ layers and [Cu(ina)2]− chains

Seven novel 3D heterometallic coordination compounds, LnCu(nds)(ina)2·H2O [Ln = Eu (1), Ce (2), Er (3), Gd (4), Sm (5), Tb(6), Dy(7); nds = 2,6-naphthanlenedisulfonate; ina = isonicotinic acid], have been synthesized under hydrothermal conditions and characterized by elemental analysis, infrared spectra, thermogravimetric analysis and single-crystal X-ray diffraction analysis. These compounds are isostructural and constructed by the linkages of 2D [Ln(nds)(H2O)]+ layers and Cu(ina)2− chains, which represent the first examples of 3D heterometallic coordination polymers created by the organodisulfonate ligands. Moreover, the complexes exhibit a novel (3,6)-connected net. The luminescence properties of complexes 1, 5 and 6 and the magnetic property of 4 were also investigated.

Novel three-dimensional Ln–Ag 4d–4f heteropentametallic helix-based microporous metal–organic framework with unprecedented (3,4,5,6)-connected topology constructed from isonicotinate ligand

An unprecedented 4d–4f heterometallic helix-based MMOF with a new (3,4,5,6)-connected topology, {[Ln2Ag3(ina)6(ox)0.5(μ2-OH2)(H2O)2.5]·1.5H2O·2NO3}n, is presented, which consists of coaxial bi-strand helices interconnected by the carboxyl groups of the ligands. Selective anion-exchange functions of the title compound containing NO3− counter anions were identified.

Syntheses, crystal structures, and luminescence of carboxylato-bridged coordination compounds

Two 2-D metal carboxylate coordination compounds [Tb(pydc)(ox)1/2(H2O)2] (1) and [Cd(pydc)(me)(H2O)]2 · H2O (2) (pyridine-2,5-dicarboxylic acid = pydc, oxalic acid = ox, me = methanol) have been synthesized under hydrothermal conditions. Carboxylates are building blocks in the formation of zigzag chain and cockle stair-like chain structures for 1 and 2, respectively. Both the compounds have been structurally determined by single-crystal X-ray diffraction, and characterized by elemental analysis, infrared spectroscopy, thermogravimetric analysis, and fluorescence spectra.

One new lanthanide complex with mixed sulfate and oxalate ligands: hydrothermal synthesis, crystal structure, and magnetic properties

A new lanthanide complex K[Gd(ox)(SO4)(H2O)] (1) with sulfate and oxalate ligands has been synthesized under hydrothermal conditions. The compound crystallizes in the monoclinic space group P21/c with a = 6.5849(1) Å, b = 8.5660(1) Å, c = 14.7660(2) Å, β = 112.470(1)°, C2H2GdKO9S, M = 398.46, Z = 4, V = 769.66(2) Å3, F(000) = 740, R 1 = 0.0199 and ωR = 0.0514. The solid-state DC magnetic susceptibility measurements of 1 revealed antiferromagnetic behavior with an S = 7/2 ground spin state.

Construction of a porous Na–Cd mixed metal–organic framework based on biphenyl-4,4′-dicarboxylate and benzotriazole

A novel mixed metal–organic framework, 2H3O·[NaCd3(C14H8O4)3(C6H4N3)3]·5.5H2O, has been synthesized under solvothermal conditions and characterized by single-crystal X-ray structure determination, IR spectroscopy, elemental analysis, TGA, and powder X-ray diffraction. Crystal structure analysis shows that the complex is a 3D framework with hexagonal channels accommodating guest water molecules. Furthermore, the photoluminescence properties and nitrogen gas adsorption of this complex were investigated. The complex exhibits strong photoluminescence emission, and its open cavities possess nitrogen adsorptive ability.Graphical abstract

Two lanthanide luminescent coordination compounds based on 3,5-pyrazoledicarboxylate and oxalic acid

Two isostructural 3-D complexes [Ln(pdc)(ox)0.5(H2O)2]⋅H2O (Ln = Tb(1), Eu(2); pdc = 3,5-pyrazoledicarboxylate; ox = oxalate) have been synthesized under hydrothermal conditions. Both are characterized by single crystal X-ray diffraction, elemental analysis, and IR. Compounds 1 and 2 possess a 3-D framework with 1-D rectangular channels built from 2-D, brick-like networks, and pdc ligands. The photoluminescence and lifetimes of 1 and 2 in the solid state have been studied.