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A new hybrid germanium vanadate (2,2′-bpy)2(VVO2)2(H2GeO4) · 6H2O 1 (2,2′-bpy=2,2′-bipyridine) was synthesized by hydrothermal method and structurally characterized by single-crystal X-ray diffraction, thermogravimetric analysis (TGA), IR, XRD and elemental analyses. Crystal data for 1: monoclinic, C2/c, a=16.6937(9) Å, b=11.3501(6) Å, c=17.4774(9) Å, β=118.19(2)°, V=2918.7(3) Å3, Z=4. Compound 1 is composed of the first germanium vanadate skeleton covalently attached to 2,2′-bpy ligands. [Copyright &y& Elsevier]

A neutral zincophosphate monomer [Zn(2,2′-bipy)]2(H2PO4)4 has been synthesized under hydrothermal condition in the presence of 2,2′-bipyridine ligands. The structure consists of a 4-membered ring formed by vertex-sharing ZnO3N2 square pyramids and H2PO4 tetrahedra, with two H2PO4 groups hanging from the zinc atoms. This compound exhibits intense photoluminescence upon photoexcitation at 388 nm. [Copyright &y& Elsevier]

A new inorganic-organic dimeric polyoxoniobate containing "S"-shaped {[Cu 3 (en) 6 (β-H 4 Nb 52 O 150) 2 } polyoxoanion was prepared and characterized. • A new inorganic-organic dimeric polyoxoniobate contains "S"-shaped {[Cu 3 (en) 6 (β-H 4 Nb 52 O 150) 2 } polyoxoanions. • Novel high-nuclearity {β-H 4 Nb 52 O 150 } cluster enriches the limited structures of the polyoxoniobate family. • The compound 1 shows effective catalytic activity for hydrolytic decomposition of nerve agent simulant DMMP. A new inorganic-organic hybrid polyoxoniobate, H 16 K 24 Na 26 [Cu 3 (en) 6 [(β -H 4 Nb 52 O 150) 2 ·88H 2 O (1) (en = ethylenediamine), decorated with [Cu(en) 2 2+ complex, has been hydrothermally synthesized and structurally characterized by single-crystal X-ray diffraction, IR, and Uv-vis. Crystal structure analysis shows that 1 contains a "S"-shaped {[Cu 3 (en) 6 (β -H 4 Nb 52 O 150) 2 } polyoxoanion which is built from novel high-nuclearity {[Cu(en) 2 (β-H 4 Nb 52 O 150)} fragments. The compound 1 shows effective catalytic activity for hydrolytic decomposition of nerve agent simulant of dimethyl methylphosphonate (DMMP). [ABSTRACT FROM AUTHOR]

A series of novel 4s–4f heterometallic cluster substituted polyoxometalates (POMs) with formula of H 9 Na 12 K 2 [K 3 Ln 4 (NO 3) 2 (GeW 10 O 37) 2 (Ge 2 W 18 O 66)]·34H 2 O (1-Ln) (Ln = Dy, Ho, Er) have been hydrothermally made by adopting a trilacunary [A-α-GeW 9 O 34 ]10− as a precursor. 1-Ln represent the first examples of metal-substituted POM clusters based on mixed POM fragments including dilacunary [α-GeW 10 O 37 ]10− and multilacunary open Well-Dawson [Ge 2 W 18 O 66 ]16− fragments. • Novel 4s–4f heterometallic substituted POMs have been prepared and characterized. • The compounds contain mixed Keggin/ open Well-Dawson POM fragments. • The Luminescent properties of these compounds were systematically studied. • The work enriches the diversity of heterometallic metal cluster substituted POMs. • This work provides a new route for making new POMs based on mixed POM units. By adopting a trilacunary [A-α-GeW 9 O 34 ]10− as a precursor under hydrothermal conditions, a series of novel 4s–4f cluster substituted polyoxometalates (POMs) containing two types of in situ generated lacunary POM fragments have been made. These compounds were characterized by single-crystal X-ray diffractions, powder X-ray diffractions, infrared spectroscopy, thermogravimetric analyses, respectively. Structural analyses indicate that these compounds constructed from a seven-nuclearity K-O-Ln (Ln = Dy, Ho, Er) heterometallic cluster stabilized by mixed dilacunary Keggin [α-GeW 10 O 37 ]10−/multilacunary open Wells-Dawson [Ge 2 W 18 O 66 ]16− fragments. Furthermore, the solid luminescent properties of the compounds at room temperature were studied. [ABSTRACT FROM AUTHOR]