0000000001303480
AUTHOR
Jun Peng
3D-transition metal mono-substituted Keggin polyoxotungstate with an antenna molecule: synthesis, structure and characterization
Three new organic-inorganic hybrid complexes based on 3d-transition metal monosubstituted Keggin polyoxometalates (POMs) with imidazole (Im) as pendant ligands, formulated as (HIm)(6-)[SiW11O39NiIm]0.8[SiW11O39Ni(H2O)]0.2.7H2O (1), (Im)4Na6[SiW11O39MnIm]0.69[SiW11O39Mn(H2O)]0.31.7.5H2O (2) and (HIm)6[SiW11O39CoIm]0.63[SiW11O39Co(H2O)]0.37.7H2O (3), have been synthesized and characterized by IR spectroscopy, UV-visible spectroscopy, elemental analysis, TG analysis, cyclic voltammetry, magnetic properties, EPR and single-crystal/powder X-ray diffraction. The structural analyses indicate that the 3d metal atoms are incorporated into the vacancy of the alpha-[SiW11O39](8-) (SiW11). Complexes 1-…
Influence of metal ions on the structures of Keggin polyoxometalate-based solids: Hydrothermal syntheses, crystal structures and magnetic properties
Abstract Three new Keggin polyoxometalate (POM)-based compounds linked to 3d metal complexes have been synthesized under hydrothermal conditions: [Cu(phen)2]2{[Cu(phen)]2 [SiMo12O40(VO)2]} (1), {[Zn(phen)2]2[GeMo12O40(VO)2]}{[Zn(phen)2(H2O)]2 [GeMo12O40(VO)2]}·3H2O (2) and {[Co(phen)2]2[PMo12O40(VO)2]}{[Co(phen)2(OH)]2 [PMo12O40(VO)2]}·2.5H2O (3) (phen=1,10-phenanthroline). These three compounds present, as building blocks, the bicapped Keggin anions [XMo12O40(VO)2] (X=Si, Ge and P). Compound 1 consists of a bicapped Keggin anion [SiMo12O40(VO)2]2− linked to two [Cu(phen)]+ complexes with two [Cu(phen)2]+ countercations. Compound 2 contains two bicapped Keggin anions [GeMo12O40(VO)2]4−, one…
A novel oxovanadate structural type – Synthesis, single crystal structure and magnetic properties of a mixed-valence polyoxovanadate formed by {V17O40(Cl)} and {V15O36(Cl)} clusters
Abstract A novel polyoxovanadate structural type, with an average nuclearity of V16, formed by a mixture of two different polyoxovananadates: {V15O36(Cl)} and{V17O40(Cl)} has been synthesized and characterized. The title compound, formulated as [Ni(phen)3]2{[V15O36(Cl)]0.5[V17O40(Cl)]0.5} · H2O (1) (phen = 1,10′-phenanthroline), presents two different polyoxovanadate architectures: {V15O36(Cl)} and {V17O40(Cl)}, with the last one representing a new framework type in polyoxovanadate chemistry. Here, we present the synthesis of this novel polyoxovanadate under hydrothermal conditions and its characterization by IR and XPS spectroscopies, elemental and thermogravimetric analysis, redox titrati…
A Co-monosubstituted Keggin polyoxometalate with an antenna ligand and three cobalt(II) chains as counterion
Abstract A Co-monosubstituted Keggin polyoxometalate with an antenna ligand linked to the Co(II) center with a Co(II)-containing cation has been prepared. The title compound, formulated as {Co(H 2 O) 4 (4,4′-bpy)} 2 (4,4′-Hbpy) 2 [SiW 11 Co(4,4′-bpy)O 39 ] · 5H 2 O ( 1 ) (4,4′-bpy = 4,4′-bipyridine), was synthesized and characterized by elemental analysis, IR spectra, TG analysis, X-ray single crystal structure analysis and magnetic measurements. As far as we know, the title compound represents the first Co(II) substituted Keggin polyoxometalate with an antenna ligand structurally and magnetically characterized.
Syntheses, structures and physical characterization of two new three-dimensional mixed-valence hexadecavanadate derivatives
Abstract Two new hexadecavanadate derivatives, (bpy)[Zn(4,4′-bpy)2]2[H4ClV16O38]·6H2O 1 and (bpy)[Co(4,4′-bpy)2]2[H4ClV16O38]·6H2O 2 (bpy = 4,4′-bipyridine), were synthesized under the hydrothermal conditions and structurally characterized by IR, XPS and EPR spectroscopy, redox titration and single-crystal X-ray diffraction. The two compounds are isostructural and crystallize in the tetragonal non-centrosymmetric space group P-4n2 (No. 118) with a = 17.124(2), b = 17.124(2), c = 14.724(3) A, V = 4317.5(12) A3 and Z = 1 for the compound 1, and a = 17.038(2), b = 17.038(2), c = 14.754(3) A, V = 4282.9(12) A3 and Z = 1 for the compound 2. Compounds 1 and 2 were constructed from 4-connected {H4…
Monolacunary Keggin polyoxometalates connected to ten 4d or 4f metal atoms.
The rational self-assembly of mono-lacunary Keggin clusters with 4d and 4f metal salts via a conventional method has yielded two novel polyoxometalate-based 4d-4f heterometallic compounds containing lacunary Keggin anions connected to ten metal atoms: {[Ag{Ag2(H2O)4}{Ln(H2O)6}2H ⊂ {SiW11Ln(H2O)4O39}2]·nH2O (Ln = Ce and n = 7 for 1, Ln = Pr and n = 3 for 2). Their structures were determined by single crystal X-ray diffraction analyses and further characterized by elemental analyses, IR spectra, and thermogravimetric (TG) analyses. A structural feature in 1 and 2 is that each [SiW11O39](8-) cluster (SiW11) is connected to ten metals (five Ag(+) and five Ln(3+) cations), representing the highe…
CCDC 606861: Experimental Crystal Structure Determination
Related Article: Hongsheng Liu, C.J.Gomez-Garcia, Jun Peng, Jingquan Sha, Lixia Wang, Yechao Yan|2009|Inorg.Chim.Acta|362|1957|doi:10.1016/j.ica.2008.09.014
CCDC 276678: Experimental Crystal Structure Determination
Related Article: Baoxia Dong, C.J.Gomez-Garcia, Jun Peng, S.Benmansour, Yumei Kong|2007|J.Mol.Struct.|827|50|doi:10.1016/j.molstruc.2006.05.011
CCDC 261263: Experimental Crystal Structure Determination
Related Article: Zhenyu Shi, Jun Peng, C.J.Gomez-Garcia, S.Benmansour, Xiaojun Gu|2006|J.Solid State Chem.|179|253|doi:10.1016/j.jssc.2005.09.051
CCDC 606862: Experimental Crystal Structure Determination
Related Article: Hongsheng Liu, C.J.Gomez-Garcia, Jun Peng, Jingquan Sha, Lixia Wang, Yechao Yan|2009|Inorg.Chim.Acta|362|1957|doi:10.1016/j.ica.2008.09.014
CCDC 689779: Experimental Crystal Structure Determination
Related Article: Hongsheng Liu, C.J.Gomez-Garcia, Jun Peng, Jingquan Sha, Lixia Wang, Yechao Yan|2009|Inorg.Chim.Acta|362|1957|doi:10.1016/j.ica.2008.09.014
CCDC 602812: Experimental Crystal Structure Determination
Related Article: Baoxia Dong, C.J.Gomez-Garcia, Jun Peng, S.Benmansour, Yumei Kong|2007|J.Mol.Struct.|827|50|doi:10.1016/j.molstruc.2006.05.011
CCDC 293662: Experimental Crystal Structure Determination
Related Article: Baoxia Dong, C.J.Gomez-Garcia, Jun Peng, S.Benmansour, Jianfang Ma|2007|Polyhedron|26|1310|doi:10.1016/j.poly.2006.10.050
CCDC 261262: Experimental Crystal Structure Determination
Related Article: Zhenyu Shi, Jun Peng, C.J.Gomez-Garcia, S.Benmansour, Xiaojun Gu|2006|J.Solid State Chem.|179|253|doi:10.1016/j.jssc.2005.09.051
CCDC 265898: Experimental Crystal Structure Determination
Related Article: Zhenyu Shi, Jun Peng, C.J.Gomez-Garcia, S.Benmansour, Xiaojun Gu|2006|J.Solid State Chem.|179|253|doi:10.1016/j.jssc.2005.09.051