Jia-Guo Wang

Nano-dimensional square grid, helix chain, interpenetrated double layer, and chain of ring structures in new cobalt(II) metal–organic polymers based on 4,4′-oxybis-(benzoic acid) and 1,n-bis(imidazol-l-yl-methyl)benzene (n = 2, 3, 4)

Four cobalt(II) coordination polymers, [Co2(oba)2(1,2-bix)2]n (1), [Co(oba)(1,3-bix)]n (2), {[Co4(oba)4(1,4-bix)4]·6H2O}n (3), and {[Co6(oba)6(1,4-bix)6]·2H2oba·3DMF·11H2O}n (4), where H2oba = 4,4′-oxybis(benzoic acid), DMF = N,N-Dimethyl formamide, and 1,n-bix = 1,n-bis(imidazol-l-yl-methyl)benzene (n = 2, 3, 4), have been synthesized. These compounds were structurally characterized by single-crystal X-ray crystallography, IR spectroscopy, and thermogravimetric analysis. Compound 1 exhibits a 2-D nano square grid (4,4) network, while 2 features a 2-D structure with two distinct left- and right-handed helical chains. Compound 3 possesses a doubly interpenetrated double-layered framework structure. The structure of 4 is comprised of 1-D chains of rings. The structural differences reveal that the flexible dicarboxylate and neutral bis(imidazole) are effective building blocks in constructing coordination polymers with diverse architectures.

La(III) and Eu(III) 2-D coordination polymers of 5-nitroisophthalic acid (H2Nip) and 1,10-phenanthroline (phen), [M(phen)(HNip)(Nip)] n

Lanthanum(III) and europium(III) complexes of 1,10-phenanthroline (phen) with 5-nitroisophthalate, [La(phen)(HNip)(Nip)] n (1) and [Eu(phen)(HNip)(Nip)] n (2), have been synthesized and characterized by elemental analysis and IR spectroscopy and studied by X-ray crystallography. The single crystal X-ray analyses show that both lanthanum(III) and europium(III) are coordinated by two nitrogens of phen and six oxygens from “Nip2−” and “HNip−”, resulting in a distorted square antiprism.

Synthesis, crystal structures, and photoluminescence of two silver(I) coordination polymers based on 2-sulfoterephthalic acid and N-donor ligands

The reactions of 2-sulfoterephthalic acid (H3stp) with silver nitrate in the presence of 2-aminopyrimidine (apym) or 2-amino-4,6-dimethylpyrimidine (dapym) generated two 2-D coordination polymers {[Ag3(stp)(apym)3]·2H2O}n (1) and {[Ag2(Hstp)(dapym)2 (H2O)]·H2O}n (2). The complexes have been characterized by single-crystal X-ray diffraction, physico-chemical, and spectroscopic methods. Both complexes have a 2-D layer structure with infinite 1-D chains linked by stp3− ligands and hydrogen bonds. The luminescent properties of the complexes were investigated.

Two new Pb(II) coordination polymers, [Pb2(μ-4,4′-bipy) (μ-2-sb)2(DMF)] n and {[Pb2(μ-4,4′-bipy) (μ-2-sb)2(H2O)2] · H2O} n (4,4′-bipy = 4,4′-bipyridine and 2-H2sb = 2-sufobenzoic acid)

Two new 2D Pb2(μ-4,4′-bipy)(μ-2-sb)2 coordination polymers, [Pb2(μ-4,4′-bipy)(μ-2-sb)2(DMF)] n (1) and {[Pb2(μ-4,4′-bipy)(μ-2-sb)2(H2O)2] · H2O} n (2), have been synthesized, characterized and studied by X-ray crystallography. The structural studies show the Pb atoms to have seven- and eight-coordinate holodirected geometries.

Hydrothermal synthesis and characterization of LaIII and CuII coordination polymers with 5-nitroisophthalic acid (H2Nip), [La2(μ-Nip)(μ-SO4)2(H2O)5] n and {[Cu3(μ-OH)2(μ-Nip)2(μ-H2O)2] · 2H2O} n

3D LaIII and 2D CuII coordination polymers with 5-nitroisophthalate anions, [La2(μ-Nip)(μ-SO4)2(H2O)5] n (1) and {[Cu3(μ-OH)2(μ-Nip)2(μ-H2O)2]  · 2H2O} n (2), have been synthesized, characterized and studied by X-ray crystallography. The La atoms have eight–coordinate geometries in distorted square antiprism environments and the Cu atoms have five- and six–coordinate geometries with distorted square pyramidal and octahedral environments. Self-assembly of these compounds in the solid state occurs through coordination and hydrogen bonding.

Cadmium(II) nano-dimensional square grid polymers based on bis(imidazol-1-yl-methyl)benzene: synthesis, characterization, and photoluminescence

Two new nano-dimensional square grid metal–organic polymers, {[Cd(1,3-bix)2(H2O)2](NO3)2} n (1) and [Cd(1,3-bix)2(NO3)2] n (2) (1,3–bix = 1,3-bis(imidazol-1-yl-methyl)benzene), have been synthesized and structurally characterized by single-crystal X-ray crystallography and FT-IR spectroscopy. Polymers 1 and 2 are 2-D layer structures consisting of nano-dimensional square grid units. The photoluminescent properties of 1 and 2 were investigated.

Chloro­bis(1,10‐phenanthroline)copper(II) 2‐carboxy­benzene­sulfonate monohydrate

In the title compound, [CuCl(C12H8N2)2](C7H5O5S)·H2O, copper(II) is coordinated by four N atoms and one chloride anion in a distorted trigonal-bipyramidal geometry. The Cu—N bond lengths are in the range 1.992 (3)–2.121 (3) A, while the Cu—Cl distance is 2.3046 (11) A.

catena‐Poly[[[(1,10‐phenanthroline)nickel(II)]‐μ‐4,4′‐oxydibenzoato] 0.25‐hydrate]

In the title compound, {[Ni(C14H8O5)(C12H8N2)]·0.25H2O}n, the Ni atom displays a distorted octahedral geometry defined by four carboxy O atoms from two 4,4′-oxydibenzoate (oba) dianions and two N atoms from a 1,10-phenanthroline molecule. The V-shaped oba anion acts as a bridge between two Ni atoms in a tris-bidentate coordination mode, forming a zigzag coordination polymer.