Yuan-Yuan Huang

Alkaline earth metal ion doped Zn(II)-terephthalates

Alkaline earth metal ion doped Zn(II)-terephthalates, [Zn2Mg(PBDC)3(DMA)2]n (1), [ZnCa(PBDC)2(DMA)2]n (2), [ZnSr(PBDC)2(DMA)2]n (3) and [Zn2Ba(PBDC)3(μ2-O1w)2(DMF)]n·n(DMF) (4) (H2PBDC = terephthalic acid, DMA = N,N′-dimethylacetamide, DMF = N,N′-dimethylformamide), have been solvothermally synthesized and characterized by single-crystal X-ray diffraction, powder X-ray diffraction, elemental analyses, IR spectra, and thermal analyses. Different secondary building subunits, [Zn2Mg(μ2-COO)3] for 1, [ZnCa(μ2-COO)3] for 2, [ZnSr(μ2-COO)3] for 3, and [Zn2Ba(μ2-COO)4(μ2-O1w)2] for 4, are realized by the introduction of different alkaline earth ions. Compound 1 is a two-dimensional (2D) layer structure with 6-connected hxl topology. Compounds 2 and 3 are isostructural and exhibit a three-dimensional (3D) framework with (3,5)-connected {4.62}{4.66.83} topology owing to their similar secondary building subunits. Compound 4 is a three-dimensional (3D) opened framework with the channels occupied by the disordered lattice DMF molecules and can be simplified into a (3,8)-connected {42.6}2{44.614.78.82} topology. Moreover, the solid-state fluorescence of compounds 1–4 have also been investigated at room temperature.

Homochiral 3D lanthanide camphorates with high thermal stability

Three isomorphous homochiral 3D lanthanide coordination polymers ([Ln(HCOO)(D-cam)]n, where Ln = Dy (1), Ho (2), Er (3)), featuring sra topology have been constructed from triple-strand helical {Ln–O}n rod SBUs and chiral D-cam spacers. Thermogravimetric analyses show the remarkable thermal stabilities of all three rigid lanthanide camphorate frameworks up to 450 °C.

Hydrothermal In Situ Ligand Synthesis to Fabricate a New Heterometallic Cu(II)-Sr(II) Coordination Polymer: Synthesis, Structure, and Thermal Analysis

A new heterometallic coordination polymer, [Cu2Sr(ipO)2(H2O)3]n·2n(H2O) (1 H3ipO = 2-hydroxyisophthalate), has been successfully synthesized and characterized. Single-crystal X-ray diffraction analysis reveals that compound 1 features a 2D layer structure based on butterfly-like [Cu2(ipO)2]2− metallo-ligand subunits, and can be simplified into a rare (3,6)-connected kgd topological network. Through intermolecular hydrogen bonds, this 2D sheet extends into a 3D supramolecular framework. In addition, thermal stability of this compound was also investigated.