Tie-Gang Wang

Hydrothermal syntheses and characterizations of two novel frameworks constructed from polyoxometalates, metals and organic units.

Two novel compounds have been hydrothermally synthesized and characterized by IR spectra and single crystal X-ray diffraction analyses. Crystal structure analyses reveal that and exhibit novel 2-D framework structures constructed from tungsten polyoxoanions, metal ions and 4,4-byp units, respectively.

First transition metal coordination compound supported on metal–oxygen cluster with bicapped quasi-Keggin structure: [Cu(en) 2 (H 2 O)] 4 [Cu(en) 2 ] 3.5 [PMo VI 8 V IV 6 O 42 Cu(en)(1,10 ′ -phen)] 3 ·14H 2 O

Abstract A novel compound, [Cu(en)2(H2O)]4[Cu(en)2]3.5[PMoVI8VIV6O42Cu(en)(1,10′-phen)]3·14H2O 1 (en = ethylenediamine, phen = phenanthroline), was synthesized hydrothermally (170 °C, 10 days, autogeneous pressure) and characterized by IR, ESR, elemental analyses and X-ray crystallography. The results of structure determination show that compound 1 contains three different structure cluster anions [PMoVI8VIV6O42]7− supporting complex cation [Cu(en)(1,10′-phen)]2+, in which one cluster anion possesses typical bicapped Keggin structure, while other two polyanions only have bicapped quasi-Keggin structures, and [Cu(en)(1,10′-phen)]2+ is linked through oxygen atoms to different V positions of two bicapped quasi-Keggin units.

Hydrothermal synthesis and characterization of a copper(I) halide coordination polymer with isonicotinic acid (IN) ligand as a template possessing three-dimensional supramolecular network structure

Abstract The title compound [CuBr(IN)]n 1 was hydrothermally synthesized from a simple reaction of CuBr2–IN–KBr–NaOH–H2O. X-ray analysis revealed that it is a new example containing extended one-dimensional staircase chain in copper(I) halide family. Its structure can be better described as a three-dimensional supramolecular network assembled via a combination of coordinate–covalent bonds and intermolecular hydrogen bonds. Moreover, compound 1 was characterized by elemental analysis, IR spectrum and TGA analysis.

0D and 1D dimensional structures based on the combination of polyoxometalates, transition metal coordination complexes and organic amines

Five novel heteropolyanions have been synthesized and characterized by IR, UV-vis, XPS spectroscopy, XRD, and elemental analyses. Single-crystal X-ray diffraction analyses reveal that these five compounds represent novel examples of compounds based on the combination of polyoxometalates, transition metal coordination complexes and organic amines. Of which 1, 2 and 3 exhibit 0D structures of polyoxometalate supported transition metal coordination complexes, while 4 and 5 exhibit novel 1D structures constructed from polyoxometalates and transition metal coordination complexes.

2D and 3D networks of lanthanide with mixed dicarboxylate ligands: syntheses, crystal structures and photoluminescent properties

A series of lanthanide complexes with mixed polycarboxylate ligands, [Ln2(op)2(ox)(H2O)4]n·nH2O (Ln = Ce, Pr, Nd, Sm, Eu and Gd for 1–6, respectively), [KLn(pma)1/2(ox)(H2O)]n (Ln = Tb (7) and Dy (8)), [KLn2(mp)3(ox)1/2(H2O)3]n (Ln = Ce(9) and Pr(10)) (op = o-phthalate, ox = oxalate, pma = pyromellitate and mp = m-phthalate), have been prepared, and their photoluminescent properties have been investigated. Compounds 1–6 show (3,4)-connected 2D network structures consisting of {Ln(op)}n staircase chains bridged by ox ligands. Compounds 7 and 8 consist of 1D zigzag {Dy(ox)}n chains linked by pma ligands adopting a new μ4-hexadentate coordination mode to form 2D 6-connected networks with (36·46·53) topology. Through K⋯O interactions, the 2D networks are further connected to construct 3D structures. Compounds 9 and 10 display inorganic–organic 3D topology networks with the Schlafli symbol (3·43·52)(32·410·59·614·7)(42·5) containing mixed (3,4,9)-connected nodes.

New compounds constructed from polyoxometalates and transition metal coordination complexes with lower positive charge

Five new hybrid compounds constructed from polyoxometalates and transition metal coordination complexes with lower positive charge: [PW11CuO39][Cu(bpy)2]5 (1), [BW12O40][Cu(bpy)2]5 (2) [BW12O40][Cu(Phen)2]3[Cu(Phen)(H2O)]2·2H2O (3), [SiW12O40][Cu(bpy)2]4 (4) and [PW12O40][Cu(bpy)2]4 (5) have been prepared and characterized by IR, UV-Vis, XPS, XRD and single crystal X-ray diffraction analyses. The packing motif of the [Cu(bpy)2]+ copper coordination complexes in compound 1 exhibits square supramolecular channels running along the a axis, which are then filled by the [PW11CuO39]5− ions. Compound 2 is isomorphours with compound 1. Compound 3 contains a novel 2-D supramolecular layer structure constructed from [Cu(Phen)2]+ copper coordination complexes through π⋯π interactions. The packing motif of the [Cu(bpy)2]+ copper coordination complexes in compound 4 exhibits a supramolecular channel which is different from compound 1. Compound 5 is isomorphours with compound 4.

Hydrothermal synthesis, crystal structure and third-order non-linear optical property of a novel one-dimensional copper(I) cyanide-organodiimine coordination polymer [Cu6(CN)6(phen)4]n (phen = 1,10-phenanthroline)

Abstract A novel one-dimensional chain coordination polymer [Cu 6 (CN) 6 (phen) 4 ] n 1 was synthesized from the simple hydrothermal reaction of Cu(CH 3 COO) 2 ·H 2 O, K 3 [Fe(CN) 6 ] and phen·H 2 O. With phen, CuCN exhibits a novel B–C–B–C chain array, namely the infinite chain is propagated via alternately three-coordinate (B) and four-coordinate (C) sites of monovalent Cu ions. It should also be noticed that the compound is the first example where the parent chain not only exhibits the [Cu(phen)] + side arm, but also is directly bound to the chelate ligand. Moreover, the third-order non-linear optical property of compound 1 was also investigated and it shows the reverse saturable absorption and self-focusing performance.

A novel 3-D chiral coordination polymer: hydrothermal synthesis and structural characterization of [Co 3 (μ 3 -OH)(μ 5 -btc)(μ 6 -Hbtc)(H 2 O) 3 ·6H 2 O] n

Abstract A chiral 3-D open-framework coordination polymer [Co3(μ3-OH)(μ5-btc)(μ6-Hbtc)(H2O)3·6H2O]n was successfully obtained from the mixture of Co(CH3COO)2·4H2O, H3btc (where H3btc=benzene-1,2,4-tricarboxylic acid), NaOH and H2O under hydrothermal condition, which contains a novel and unprecedented coordination mode of btc (see Scheme 1 Download : Download high-res image (32KB) Download : Download full-size image Scheme 1 . Coordination modes of btc in the compounds having been synthesized. I, μ4-btc (in the literature [9] ); II, μ6-btc and III, μ5-btc (see this paper). ).

Hydrothermal synthesis and structural characterization of the first mixed molybdenum–tungsten capped-keggin polyoxometal complex: {[Co(dien)]4[(AsVO4)MoV8WVI4O33(µ2–OH)3]}·2H2O

The first polyoxometal complex possessing affirmatory mixed molybdenum-tungsten capped Keggin-type structure has been hydrothermally synthesized.

Zero- and two-dimensional structures based on AsIII–VIV polyoxometalates

Two new compounds based on AsIII–VIV polyoxometalates, [HAs6V15O42(H2O)][Cu(enMe)2]2.5·2H2O (1), [H2enMe]2[As8V14O42(H2O)]·3H2O (2), have been hydrothermally synthesized and characterized by IR, UV-vis, ESR, XPS spectra, elemental analyses, magnetic susceptibility studies and single-crystal X-ray diffraction analyses, respectively. X-Ray crystallographic studies reveal that 1 represents the first example of 2D structure constructed from [HAs6V15O42(H2O)]5− anions and transition metal coordination complexes, in addition, it exhibits the first brick-wall-like 2D layer structure constructed from polyoxometalates and transition metal coordination complexes. 2 exhibits a very interesting stacking mode. The study of magnetic susceptibilities demonstrates the presence of antiferromagnetic interactions in both 1 and 2.