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Abstract: A series of new polyoxometalates based on [Ni6(μ3-OH)3(H2O)6(en)3(B-α-PW9O34)] (en=ethylenediamine) clusters capped by different tripodal alcohol ligands have been hydrothermally synthesized and characterized by IR, TGA and single-crystal X-ray diffraction, respectively. The experimental results indicate that the tripodal alcohol ligands can substitute three hydroxyl groups located on the axial positions of the Ni6 cluster to form new polyoxometalates with different substituted modes. [Copyright &y& Elsevier]

Abstract: A novel hybrid borate B3O4(OH)·0.5(C4H10N2) 1 was synthesized under milder hydrothermal conditions. The product was characterized by a combination of elemental analysis, FT-IR, thermogravimetric analysis and powder X-ray diffraction, as well as single-crystal X-ray diffraction studies. The structure consists of two types of inorganic borate helices cohered by piperazine rings, giving rise to a neutral hybrid sheet. The adjacent layers are stacked in a parallel fashion and further stabilized by hydrogen bonding interactions. [Copyright &y& Elsevier]

Abstract: An unexpected 3D manganese vanadate (en)Mn2(V2O7) (1) (en=ethylenediamine) has been hydrothermally obtained by H2E2Ge2O3 (E=−CH2CH2COO−) ligands and well-prepared mixture of V–Mn-amine and characterized by IR spectroscopy, elemental analysis, thermal stability and powder X-ray diffraction. Single-crystal X-ray diffraction analysis reveals that the structure is a novel pillared-layer, in which MnO5N octahedra are corner-linked to form an infinite sheet with 4-membered rings (MRs) and further condensed to the 3D framework. The most prominent feature of 1 is the connection between the sheets via double bridges, namely, inorganic V2O7 dimeric units and organic en molecules. It is noteworthy that inorganic and organic double bridges between sheets have not been seen in manganese vanadates. [Copyright &y& Elsevier]

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]

Abstract: A novel di-copperII-complex substituted monovacant Keggin polyoxotungstate [Cu(2,2′-bpy)(H2O)][H2PW11O39Cu2(2,2′-bpy)2(H2O)(OH)]·1.5H2O (1) (2,2′-bpy=2,2′-bipyridine) with a 1D polymeric chain has been hydrothermally synthesized and structurally characterized. To our knowledge, 1 is the rare magnetic di-transition metal-complex substituted monovacant Keggin polyoxotungstate with a unique 1D dual-bridging chain structure. Its magnetic behavior has been quantitatively analyzed by the Bleaney–Bowers equation, indicating the presence of weak antiferromagnetic interactions within dinuclear CuII centers. [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]

Abstract: An organically-templated chiral borogermanate (CH3NH3)2[Ge(B4O9)] (1), has been solvothermally synthesized and characterized by elemental analysis, IR, PXRD, TGA, single-crystal X-ray diffraction and UV–vis spectrum. It crystallized in the monoclinic space group C2 (No. 5) with a =10.249(1)Å, b =9.449(1)Å, c =6.956(2)Å, β =131.76(2)°, V =502.43(19)Å3, Z =2. The structure is constructed by alternate linkage of GeO4 tetrahedra and B4O9 clusters to form a zeotype framework with diamond topology. Four intersecting channels with different sizes are observed. Large circular 10-ring channels are clearly extended along the [001] direction, 9-ring channels are running along the [101], [110], and [112] directions, respectively. Additionally, two pairs of the right- and left-handed channels couple together along the [100] and [010] directions, respectively. The preliminary investigations show that compound 1 exhibits second-harmonic generation (SHG) response and ferroelectric properties. [Copyright &y& Elsevier]

A novel manganese oxyborate, K7{(BO3)[B12O18(OH)6]} · H2O (1), which is the first example showing the edge-sharing between boron and transition metal, has been solvothermally synthesized. The structure consists of [B12O20(OH)4] and [BO3] which are linked through unusual MnO5 polyhedron via vertexes and edges. This compound exhibits NLO properties and the intensity of the green light (frequency-doubled output: λ=532 nm) produced by 1 is as large as that of KDP. [Copyright &y& Elsevier]

Two new hollow 3D tubular polyoxoniobate frameworks are built from { SiNb 18 O 54 } clusters, copper-organic complexes and helical heterometallic Ba 2 K 4 O 13 / Ba 2 NaO 7 cluster chains. [Display omitted] • Two new hollow 3D tubular polyoxoniobate frameworks are synthesized hydrothermally. • The nanotubes enrich the structures of the heteropolyoxoniobate family. • The compounds 1 and 2 show excellent proton conduction properties. Two new 3D tubular polyoxoniobate frameworks, [Cu(en) 2 ] 2 {[Cu(en) 2 ] 2 K 4 Ba 2 (H 2 O) 13 (SiNb 18 O 54)} 2 ·3en·52H 2 O (1) and H 6 [Cu(en) 2 ] 2 {[Cu(en) 2 ] 2 NaBa 2 (H 2 O) 7 (SiNb 18 O 54)} 2 ·3en·50H 2 O (2) (en = ethylenediamine) have been synthesized by hydrothermal reactions. Interestingly, their frameworks both consist of rare inorganic-organic hybrid polyoxoniobate nanotubes and helical heterometallic Ba 2 K 4 O 13 / Ba 2 NaO 7 cluster chains. The nanotubes are both built from { SiNb 18 O 54 } clusters and copper-organic complexes. Compounds 1 and 2 present excellent proton conduction properties. [ABSTRACT FROM AUTHOR]