Carboxylate-Functionalized Phosphomolybdates: Ligand-Directed Conformations

A d-Methionine-Bonded Nanosized Heteropolyoxotungstate with Photocoloration

A d-methionine-bonded nanosized arsenotungstate, Ba9K10H6[{As2W19O67(H2O)}2{AsW9O33}2{W3O6(H2O)(d-Met)}2{W2O4(OH)(d-Met)}]·60H2O [1; d-Met = d-methionine (C5H11NO2S)], is constructed without the use of lanthanide ions. The polyanion of 1 contains two {As2W19O67(H2O)}14- building blocks and two {B-β-AsW9O33}9- subunits, integrated together with a {W2O4(OH)(d-Met)}2+ and two {W3O6(H2O)(d-Met)}5+ subclusters. Interestingly, 1 displays a highly reversible photocoloration property with a half-life (t1/2) time measured as about 0.793 min.

A Series of Polyoxometalate-Viologen Photochromic Materials for UV Probing, Amine Detecting and Inkless and Erasable Printing

In this work, by using two kinds of viologen ligands three POM-based Compounds were obtained under hydrothermal conditions, namely [Ag^I (bmypd)_0.5 (β-Mo₈ O₂₆ )_0.5 ] (1) (bmypd ⋅ 2Cl=1,1'-[Biphenyl-4,4'-bis(methylene)]bis(4,4'-bipyridyinium)dichloride), [Ag^I ₂ (bypy)₄ (HSiW₁₂ O₄₀ )₂ ] ⋅ 14H₂ O (2) and [Ag^I (bypy)(γ-Mo₈ O₂₆ )_0.5 ] (3) (bypy⋅Cl=1-Benzyl-4,4'-bipyridyinium chloride). The structures were characterized by Fourier transform infrared spectroscopy (FT-IR), Powder X-ray diffraction (PXRD), X-ray photoelectron spectroscopy (XPS) and single crystal X-ray diffraction. Compounds 1-3 show excellent photochromic ability with fast photoresponse under the irradiation of ultraviolet light with different degrees of color changes. So compounds 1-3 can be used as visible ultraviolet detectors. Compounds 1-3 also possess photoluminescence properties with fast and excellent fluorescence quenching effect. Compounds 1-3 also can be used as inkless and erasable printing materials with suspensions of 1-3 applied to filter paper. Compounds 1-3 can also produce color changes in amine vapor environment, especially in an NH₃ atmosphere. Compounds 1-3 can be used as organic amine detectors.

{PMo6O24N4} subunit functionalized by organonitrogen through Mo–N bonds: hydrothermal synthesis, structure, photocatalytic, and fluorescence sensing properties

Under hydrothermal conditions, a {PMo₆O₂₄N₄}-based compound functionalized by btmbz has been synthesized, in which the Mo–N bonds assist the construction of the {PMo₆O₂₄N₄} subunit.

A binuclear copper-substituted phosphomolybdate with reactive oxygen species catalytic ability and antimicrobial activity

A magnetic binuclear Cu-substituted Strandberg POM can produce ROS and inhibit the growth of E. coli.

Aromatic sulfonium polyoxomolybdates: tuning the photochromic properties through substitutions on the counter ion moiety

A series of aromatic sulfonium Keggin hybrids have been developed which exhibited excellent photochromic properties under UV irradiation. The photo-coloration speed of these hybrids could be fine-tuned by changing the substituents on the sulfonium counter ion moiety.

Construction of a new binding manner in carboxylic acid-functionalized phosphomolybdates

A new binding manner of C–N–Mo bonds was constructed in carboxylic acid-functionalized phosphomolybdates, and the polyanion was present as a hexamer.

Three novel and various isopolymolybdate-based hybrids built from the carboxyl oxygen atoms of in situ ligands: substituent-tuned assembly, architectures and properties

Three isopolyoxometalate-based hybrids assembled from in-situ generated ligands reveal that the N-donor groups of ligands may play key roles in the self-assembling process and various structures of the title compounds.

Magnetic and luminescence properties of an inorganic 3D nickel–vanadium bimetallic framework

Magnetic and luminescence properties of the first nickel–vanadium inorganic 3D framework with a pair of entangled double helices.

A 3D cadmium–vanadium bimetallic framework with luminescence properties

Luminescent properties of a novel cadmium–vanadium bimetallic 3D framework possessing a pillared-layer.

Synthesis and characterization of [(HPO3)6Mo21O60(H2O)4]8−: a new redox active heteropoly blue cluster with layered shape containing a phosphite template that self-assembles under controlled microwave irradiation

A redox active layered shape [(HPO₃)₆Mo₂₁O₆₀(H₂O)₄]⁸⁻ with a phosphite template is synthesised by a microwave-assisted method and characterized.

Organic-inorganic hybrid rare earth complexes based on polymolybdates with intrinsic photosensitive properties

A series of organic–inorganic hybrid rare earth complexes {[RE2(PO)2(H2O)10][H2Mo36O112(OH2)12(PO)4]}·5PO·2(CH3CN)·nH2O [n = 23–42, RE(III) = Nd(III), 1; Sm(III), 2; Eu(III), 3; Gd(III), 4; Dy(III), 5; Er(III), 6; Tm(III), 7; Yb(III), 8; Lu(III), 9; Y(III), 10; PO = piperidin-2-one] have been synthesized and fully characterized by single-crystal X-ray diffraction, powder X-ray diffraction, elemental analysis, IR spectra, thermogravimetric analysis and UV-vis spectra. Structural analysis reveals that compounds 1-10 are isostructural and crystallize in the monoclinic P2(1)/n space group. Each compound contains a centrosymmetric anionic cluster [Mo36O112(OH2)12(PO)4](8-), which could be described as the derivative of [Mo36O112(OH2)16](8-) with four water molecules substituted by organic PO molecules. Each {Mo18} subunit connects with one RE(III) ion via its two terminal O atoms from two independent {MoO6} octahedra. The eight coordinated RE(III) ion with a distorted tetragonal antiprism coordination geometry is also surrounded by another six oxygen atoms, five of them from five water molecules and the final one from one PO molecule. Compounds 1-10 show considerable photosensitive behavior under visible light excitation. In addition, compound 3 exhibits three emission bands at 580, 595 and 617 nm in the solid state, which could be assigned to (5)D0→(7)F0, (5)D0→(7)F1 and (5)D0→(7)F2 transitions of Eu(III) ions, respectively.

A silver-alkynyl cluster encapsulating a fluorescent polyoxometalate core: enhanced emission and fluorescence modulation

A fluorescent polyoxometalate-based silver(i)-alkynyl cluster exhibits sensitivity towards high energy UV irradiation and selectivity for detection of S²⁻.

Double-malate bridging tri-lanthanoid cluster encapsulated arsenotungstates: syntheses, structures, luminescence and magnetic properties

Five members of a new family of POM-ligated double-malate bridging tri-lanthanoid clusters have been synthesized and characterized.

Self assembly of carboxylate/alcoholate functionalized ring-shape phosphomolybdates

Carboxylate and alcoholate ligands were covalently attached to a [HPMo₆O₂₁]²⁻ cluster to generate a series of inorganic–organic hybrid phosphomolybdates.

Controlled assembly of inorganic-organic frameworks based on [SeMo6O21]4- polyanion

The chemical system based on [SeMo6O21](4-) polyanion and carboxylate ligand has been investigated. According to the inherent nature of organic groups, a series of selenomolybdates with three architectures have been isolated through rational and deliberate synthetic routes by stereospecific addition of different carboxylic acids. Such an approach is potentially interesting for {SeMo6} cluster, which exhibits a high surface nucleophilicity and is capable of being functionalized by covalently bound carboxylic acids. Investigation of the assemblies reveals that carboxylic acids have good flexibility and conformational freedom, representing the powerful chemical tools to control the polyanion assembly processes.