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Shi Z.,Northeast Normal University | Shi Z.,Xingyi Normal College for Nationalities | Peng J.,Northeast Normal University | Yu X.,Northeast Normal University | And 3 more authors.
Inorganic Chemistry Communications | Year: 2014

Through hydrothermal reactions of d0 metal ions with 5-(4-imidazol-1-yl-phenyl)-2H-tetrazole (HL), two new octamolybdate-based hybrids, namely, (H2L)2[Ag2(HL) 2(β-Mo8O26)] (1) and [Cu 4(HL)4(θ-Mo8O26)] ·5H2O (2), have been prepared and structurally characterized. X-ray single-crystal analyses show that compound 1 consists of discrete H 2L cations and infinite one-dimensional (1D) anionic chains [Ag 2(HL)2(β-Mo8O26)]2 - constructed by [β-Mo8O26]4 - bridged via dinuclear clusters {Ag2(HL)2}2 +. Compound 2 displays a 2D network generated by 1D cationic tetranuclear copper cluster chains {Cu4(HL)4}n and [θ-Mo 8O26]4 - clusters. In addition, luminescent properties of both compounds have been studied. © 2014 Elsevier B.V.


Shi Z.-Y.,Northeast Normal University | Shi Z.-Y.,Xingyi Normal College for Nationalities | Peng J.,Northeast Normal University | Li Y.-G.,Northeast Normal University | And 4 more authors.
CrystEngComm | Year: 2013

Two unusual α-Keggin-based compounds with multinuclear silver clusters, {[Ag7(H2biim)5][PW11O 39]}·Cl·H3O (1) and {[Ag2(H 2biim)2][Ag(phnz)](PW12O40)} ·H2O (2) (H2biim = 2,2′-biimidazole, phnz = phenazine), have been hydrothermally synthesized and structurally characterized by elemental analyses, IR spectra, thermogravimetric analysis and X-ray crystallography. Compound 1 displays a 2D network featuring dimerized monolacunary Keggin anions {PW11O39}2 which are connected together through pentanuclear silver clusters. Interestingly, besides {Ag5}5+ clusters, there are another kinds of argentophilic {Ag4}4+ clusters coexisting in compound 1. Compound 2 consists of four subunits: 1D cationic chains [Ag(phnz)]+, dinuclear silver-H2biim units [Ag2(H2biim) 2]2+, discrete polyanions {PW12O 40}3- and water molecules, which are further joined by hydrogen bonds to form a 3D supramolecular structure. The differences in the structures of compounds 1 and 2 indicate that the introduction of the secondary organic ligand plays a key role in determining the final structure. The electrochemical, electrocatalytic behaviors and luminescent properties of compounds 1 and 2 have also been investigated. © 2013 The Royal Society of Chemistry.


Shi Z.-Y.,Northeast Normal University | Shi Z.-Y.,Xingyi Normal College for Nationalities | Zhang Z.-Y.,Northeast Normal University | Peng J.,Northeast Normal University | And 2 more authors.
CrystEngComm | Year: 2013

Two new Keggin-based hybrids with polynuclear Cu(i) clusters, formulated as [Cu4(HL)4(SiW12O40)]·6H 2O (1) and [Cu6.5(HL)2(L)4(H 2O)(H1.5SiW12O40)]·3H 2O (2) (HL = 5-(4-imidazol-1-ylphenyl)-2H-tetrazole), have been hydrothermally synthesized and characterized by routine techniques. In 1, Keggin polyanions [SiW12O40]4- (SiW12) link adjacent [Cu4(HL)4]n chains to generate a 2D network. In 2, a cationic (2,3,11)-connected 3D framework, {Cu 6.5(HL)2(L)4(H2O)}2.5+, is induced by SiW12 as the template. The differences in the structures of compounds 1 and 2 indicate that pH and the acid radical ions in the initial reaction system play a key role in determining the final structures. Interestingly, the ligand HL in 1 only adopts a μ1,2,3 bridging mode, while in 2, the ligand is in HL/L states and exhibits four different bridging modes: μ1,2,3,4,5, μ1,2,3,5, μ1,2,4,5, and μ1,2,4. The luminescent properties of compounds 1 and 2 have also been investigated. The results show that solvent-dependent luminescence properties can be found in 1. In addition, electrochemistry properties of 1 and 2 have also been studied. This journal is © 2013 The Royal Society of Chemistry.


Shi Z.,Northeast Normal University | Shi Z.,Xingyi Normal College for Nationalities | Peng J.,Northeast Normal University | Zhang Z.,Northeast Normal University | And 3 more authors.
Inorganic Chemistry Communications | Year: 2013

Two new Dawson-based hybrids, namely, [Ag6(H L) 4(H2O)6(P2W18O 62)]·4H2O (1) and [Ag4(H 2biim)4][K2(H2O)3(P 2W18O62)]·H2O (2) (HL = 5-(4-imidazol-1-yl-phenyl)-2H-tetrazole, H2biim = 2,2′-biimidazole), have been hydrothermally synthesized and characterized. X-ray diffraction analysis reveals that compound 1 is a 3D structure based on infinite organic-metal chains {Ag6(HL)4}n and Wells-Dawson anions. Compound 2 displays a 3D framework based on potassium-Dawson inorganic sheets and dinuclear silver-H2biim units. The luminescent properties of compounds 1 and 2 have also been investigated. © 2013 Elsevier B.V.


Shi Z.,Northeast Normal University | Shi Z.,Xingyi Normal College for Nationalities | Peng J.,Northeast Normal University | Yu X.,Northeast Normal University | And 4 more authors.
Inorganic Chemistry Communications | Year: 2013

A new 3D Keggin-based metal-organic framework consisting of two kinds of Cu-H2biim chains, Cu10(H2biim) 10(PW12O40)2(OH)4· 5H2O 1 (H2biim = 2,2′-biimidazole), has been synthesized under hydrothermal conditions. The TGA and PXRD measurements show that the framework is stable after removal of the guest water molecules. In addition, the luminescent and electrochemical properties of 1 have also been investigated. © 2012 Elsevier B.V.

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