Topic
Polyoxometalate
About: Polyoxometalate is a research topic. Over the lifetime, 3493 publications have been published within this topic receiving 94123 citations. The topic is also known as: POM.
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57 citations
TL;DR: 1 represents the first 3-D TMSP with 6(5)-8 CdSO4 topology in polyoxometalate chemistry and ferromagnetic interactions within the copper ions and the coupling constants can be determined.
Abstract: A 6(5)8 CdSO4-type 3-D framework built by hexa-Cu" sandwiched polyoxotungstates [Cu(en)2]2-[Cu(deta)(H2O)]2[Cu6(en)2(H2O)2(B-alpha-GeW9O34)2] x 6H2O (1) (en = ethylenediamine and deta = diethylenetriamine) has been hydrothermally synthesized and structurally characterized by elemental analysis, IR spectrometry, thermogravimetric analysis and single-crystal X-ray diffraction. To the best of our knowledge, 1 represents the first 3-D TMSP with 6(5)-8 CdSO4 topology in polyoxometalate chemistry. Magnetic measurements performed on 1 indicate the occurrence of ferromagnetic interactions within the copper ions and the coupling constants can be determined.
56 citations
TL;DR: In this article, a new inorganic ionic liquid consisting of an inorganic polyoxometalate anion with the Keggin structure and a sodium cation was prepared and physicochemical properties were investigated.
Abstract: New inorganic ionic liquids (IIL) consisting of an inorganic polyoxometalate anion with the Keggin structure and a sodium cation, that is Na13[Ln(TiW11O39)2]·xH2O [where Ln = lanthanide (type 1)], Na5[MTiW11O39]·xH2O and Na6[MTiW11O39]·xH2O [where M = transition metal (type 2)], were prepared and their physicochemical properties were investigated. These ionic liquids were characterized by NMR and IR spectroscopy and by elemental analysis. Their melting point, viscosity, conductivity, thermal stability, and miscibility with water and organic solvents were determined. When the temperature is below ambient temperature (about 298 K) these ionic liquids are almost immiscible with water. When the temperature is raised, the solubility of the new ionic liquids increases sharply. The influence of the size and of the charge density of both the cations and anions on these properties was examined. The most remarkable feature of IILs is that water is their indispensable component. The role of the water molecule in ionic liquids is similar to that of crystalline water in hydrated compounds. (© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2004)
56 citations
TL;DR: In this paper, the combination of a linear linker NH2 with 4-connected tetrahedral tetrakis(4-formylphenyl)silicon building units produced three isostructural complexes M-Anderson-COFs with a 3-fold interpenetrated diamondoid network.
Abstract: Covalent organic frameworks (COFs) have functional synthons, diverse structures and feature-rich functionality. Herein, the combination of a linear linker NH2–{MMo6}–NH2 with 4-connected tetrahedral tetrakis(4-formylphenyl)silicon building units produced three isostructural complexes M-Anderson-COFs with a 3-fold interpenetrated diamondoid network. Among them, Mn-Anderson-COF exhibited the highest catalytic activity in the photodegradation of RhB and MB in water. The addition of different scavengers demonstrated that 1O2 and H2O2 were primary reactive species to degrade the dyes. Moreover, using M-Anderson-COF as a catalyst, organic sulfides were almost completely oxidized with 100% sulfoxide/sulfone selectivity.
56 citations
TL;DR: A novel polyoxometalate-based metal-organic framework (POMOF) with an ABW network, NENU-601, was synthesized in situ and is the first POMOF with a zeolite-like structure, which was designed by regulating the length and angle of mixed ligands and rationally choosing suitable Polyoxometricalates (Poms) as nodes.
56 citations