Themed collection Emergent Polyoxometalates and Soft-oxometalates

New advances in polyoxometalate-containing systems are presented, with emphasis on those for which non-covalent organization creates new structures with new properties.

In this perspective, the field of covalent polyoxometalate–polymer hybrids has been reviewed and some perspectives are provided.

Coupled dynamic simulation and isotope-exchange studies of polyoxometalate ions stress the importance of metastable structural states.

Surfactants with a polyoxometalate (POM) [PW₁₁O₃₉]³⁻ head and protons as counter-ions are used for the emulsion polymerization of hybrid polydimethylsiloxane (PDMS) networks.

The prepared Pd/polyoxometalate/reduced graphene oxide (Pd/POM/rGO) nanocomposite exhibits enhanced catalytic activity and excellent methanol-tolerance due to the synergistic effect of Pd, POM, and rGO.

Substitution reactions of polyoxometalate–organic hybrid materials provide a post-functionalization protocol to bring in various additional functional groups.

A polymer containing polyoxometalates in its main chain exists as a thin rod in a good solvent. The addition of a poor solvent induces the formation of hollow cylinders through counterion mediated attraction.

Polyoxometalate-stabilised gold nanoparticles internalise in vast quantities into kidney epithelial and skin melanoma cell lines causing antiproliferative action on tumoural cells.

Trihexyl(tetradecyl)phosphonium and Keggin polyoxotungstates [PW₁₁O₃₉M(H₂O)]ⁿ⁻, M = Fe, Co, Mn, or related lacunary [PW₁₁O₃₉]⁷⁻ and [P₂W₂₀O₇₀(H₂O)₂]¹⁰⁻ anions yield compounds that are liquids at room temperature.

DFT calculations and experimental data prove that the [Na{(Mo^V₂O₄)₃(μ₂-O)₃(μ₂-SO₃)₃(μ₆-SO₃)}₂]¹⁵⁻ POM is capable of completely reducing Au(III) to Au(0).

The physical and electronic structures of cesium salts of niobo-tungstate Lindqvist ions vary with Nb content, elucidated experimentally and computationally.

Surface modification of the parent hexamolybdate by aryl amines results in useful catalysts for the oxidation of cyclohexene to cyclohexene epoxide and benzyl alcohol to benzaldehyde and benzoic acid.

P₅W₃₀ stabilized Au nanoparticles and graphene oxide were fabricated to form composite films exhibiting good electrocatalytic activity for H₂O₂ reduction.

The self-assembly of the polyoxometalate–cholesterol conjugate can be well controlled and regulated by means of a temperature-mediated approach.

Enhancement of photochemical water oxidation using a graphene oxide matrix for [Na₁₇[Mn₆P₃W₂₄O₉₄(H₂O)₂]·43H₂O@GO] soft-oxometalate is shown.

We study the growth of a homogeneously nucleated micro-bubble amidst convective flows in water superheated close to the critical point.

Using ⁵¹V NMR spectroscopy, dynamic light scattering and continuous shape analysis to characterize two polyoxometalate-encapsulation in reverse micelles.

Micromotors based on Mo₇ soft-oxometalates (SOMs) which are very easy to synthesize and move autonomously in the presence of dithionite which acts as the chemical fuel.

Novel mesoporous POSS-derived POM-paired polymeric hybrids were demonstrated to be highly efficient interfacial solid catalysts for the epoxidation of alkenes with H₂O₂.

High-resolution solid-state ¹⁹⁵Pt MAS NMR spectroscopy is a powerful technique for the characterization of Pt^IV-containing polyoxometalates, as is demonstrated for several examples.

The reaction of SeO₃²⁻/WO₄²⁻/VO₄³⁻ gives a complex mixture of Lindqvist W–V anions and larger Se–W–V containing POMs.

We report the visible-light-responsive photoredox catalysis of a lacunary silicotungstate for selective aerobic oxygenation of sulfides and deoxygenation of sulfoxides.

Structurally different dipeptides were hydrolyzed by [{α-PW₁₁O₃₉Zr-(μ-OH)(H₂O)}₂]⁸⁻. The rate constants were dependent on bulkiness and chemical nature of the dipeptide.