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Two novel inorganic–organic hybrid 3D TM–Ln incorporated POM-based frameworks, H2[Cu2OL3(H2O)2][Ce(L)(H2O)3(PW11O39)]·17H2O (1) and H4[CuL3]2[Ln(H2O)3(PW11O39)]2·28H2O (2) (L = 4,4′-bipyridine), were hydrothermally synthesized at different temperatures. Structural analysis reveals that both compounds are constructed from [Ln(PW11O39)]4− polyoxoanions and different copper complexes. Interestingly, in compound 1, 2D copper complex layers and 1D chain [Ln(PW11O39)]4− polyoxoanions interconnect to form a 3D framework. In contrast, in compound 2, 1D copper complex chains join the 2D [Ln(PW11O39)]4− layers to give rise to a 3D framework. Both compounds exhibit excellent chemical stability. Furthermore, the dye adsorption and proton conduction properties of both compounds were also investigated. The conductivities of 1 and 2 are 3.175 × 10−4 S cm−1 and 1.750 × 10−4 S cm−1 at 85 °C and 98% RH, respectively. Dye adsorption studies indicate that they can selectively adsorb cationic dyes MB, CV and BR over anionic dyes MO, AO and large cationic RhB. [ABSTRACT FROM AUTHOR]

A series of new Ln14-substituted polyoxometalates, H27Na16[(Ln14(H2O)W4(OH)O14)(WO4)4(GeW10O38)6]·nH2O (n≈ 86) (1-Ln, Ln = Eu, Gd, Tb, Dy, Ho, Er), which contain 14 Ln3+ and 6 {α(1,5)-[GeW10O38]12−} units, has been synthesized in one-pot reactions. As the first 14-Ln-containing polyoxometalates, the octahedron-shaped three-shell structure of the [(Ln14(H2O)W4(OH)O14)(WO4)4(GeW10O38)6]43− polyanion is made up of a W4 tetrahedron, a Ln14W4 tetrahedron and a Ge6W60 octahedron. Compound 1-Dy exhibits frequency dependent magnetic properties. Compounds 1-Eu, 1-Tb and 1-Dy exhibit the characteristic emission bands of the Ln3+ ion. [ABSTRACT FROM AUTHOR]

Two rare mixed-cluster-organic frameworks (CH3NH3)3[Cu4-(μ3-O)2(Lb)4][MnMo6O18(La)2]·4NMF·5H2O (1) and [(CH3)2NH2]3[Co5-(μ3-O)2(Lb)6]-[MnMo6O18(La)2]·5DMF (2) (La = 2-(hydroxymethyl)-2-(pyridin-4-yl)-1,3-propanediol; Lb = 4-(2-(4-pyridyl)ethenyl) benzoic acid; NMF = N-methylformamide; DMF = N,N-dimethylformamide) have been obtained, exhibiting the first two porous materials simultaneously integrating polyoxometalates and transition-metal–oxygen clusters as secondary building units (SBUs). [ABSTRACT FROM AUTHOR]

Three novel polyoxometalates (POMs) containing [Ni6(μ3-OH)3]9− and [P2W15O56]12− units were first made, showing the first hexa-nuclearity transition-metal substituted POMs (TMSPs) based on monomeric lacunary Dawson fragments, which further indicates that the hydrothermal technique can offer an effective way for making new TMSPs through lacunary POM fragments incorporated with high-nuclear TM clusters. [ABSTRACT FROM AUTHOR]

A tin(ii) tungstosilicate derivative K11H[Sn4(SiW9O34)2]·25H2O with four sandwiched Sn2+cations was prepared by reaction of SnCl2, KCl and Na10[α-SiW9O34]·xH2O. Visible-light photocatalytic H2evolution activity was observed with Pt nanoparticles as co-catalyst and methanol as sacrificial agent. [ABSTRACT FROM AUTHOR]