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.
Papers published on a yearly basis
Papers
More filters
TL;DR: In this article, a multielectronic process sustaining polyoxometalate (POM) into new green and water-insoluble nanomaterials was used for complete photodegradation of AO7 in aerobic media.
Abstract: Several poly(ionic liquid)s (PILs) were synthesized and assembled with a multielectronic-process sustaining polyoxometalate (POM) into new green and water-insoluble nanomaterials (POM@PILs). They are visible light photosensitive, unlike their two components. A synergic effect was highlighted for the first time. POM@PILs achieve complete photodegradation of AO7 in aerobic media. The photocatalysts were recoverable and recyclable.
45 citations
TL;DR: In this paper, the electrochemical behavior of polypyrrole doped with polyoxometalate (POM) anion was studied by cyclic voltammetry in three different electrolytes formed by two anions and two cations.
Abstract: Hybrid materials constituted by polypyrrole doped with the polyoxometalate (POM) anion [SiCr(H 2 O)W 1 1 O 3 9 ] 5 - were electrogenerated from acetonitrile solutions. The electrochemical behavior of the hybrid films was studied by cyclic voltammetry in three different electrolytes formed by two anions and two cations, dissolved in acetonitrile. Following both, the film weight evolution and the solutions composition with cycling, together with an EDX study of the film showing the electrochemical evolution, have allowed the identification of the ions interchanged during the redox processes for the different studied electrolytes. Prevalent cation interchange, continuous substitution of the POM anion by the anion in solution, and partial electrodissolution of the hybrid film were identified as prevalent processes in the different electrolytes. Conducting measurements show that the films present a high room temperature conductivity that is thermally activated. Magnetic measurements confirmed the presence of the paramagnetic POM in the films and indicate that the number of pyrrole monomers per cationic charge is about 4.5. These results have been confirmed by elemental analysis.
45 citations
TL;DR: In this paper, an amphiphilic mesostructured polyoxometalate-based ionic hybrid has been successfully synthesized through designing new POSS-derived mesoporous poly(ionic liquids) (POSS-BMx) to interact with Keggin-type phosphotungstic acid (PW).
Abstract: Novel amphiphilic mesostructured polyoxometalate-based ionic hybrids have been successfully synthesized through designing new POSS-derived mesoporous poly(ionic liquids) (POSS-BMx) to interact with Keggin-type phosphotungstic acid (PW). The obtained ionic hybrids POSS-BMx-PW have good thermal stability, adjustable pore structure and surface wettability. Catalytic tests for H2O2-based epoxidation of cyclooctene, along with comparisons to various counterparts, well demonstrate that POSS-BMx-PW (x = 8, 11) exhibit high activity and selectivity, coupled with convenient recovery and steady reuse. The unique mesoporous structure and the amphiphilic catalyst surface are revealed to be responsible for the catalyst’s excellent performances in epoxidation reaction with H2O2.
44 citations
TL;DR: Cobalt-substituted polyoxometalate (POM), α -[SiW 9 O 37 {Co(H 2 O)} 3 ] 10−, was heterogenized for its effective use as a solid catalyst in the liquid-phase reaction by inserting it in between the layers of basic Mg 3 Al-hydrotalcite as mentioned in this paper.
44 citations
TL;DR: In this article, a carbon-based hybrid is composed of N-doped ordered mesoporous carbon and polyoxometalate (POM) based ionic salt (IL-POM), constructing the first efficient non-noble metal heterogeneous catalyst for reductant-free hydroxylation of benzene to phenol with molecular oxygen.
Abstract: A novel carbon-based hybrid is composed of N-doped ordered mesoporous carbon (NC) and polyoxometalate (POM) based ionic salt (IL-POM), constructing the first efficient non-noble metal heterogeneous catalyst for reductant-free hydroxylation of benzene to phenol with molecular oxygen. Enhanced activity and reusability were achieved and were even better than the previous noble metal involved system. The newly task-specifically designed dicationic ionic liquid tethered with the nitrile group contributed to the high efficiency and heterogeneous property. Systematic structure–activity analysis revealed that the superior activity for this difficult reaction came from the simultaneous activation of benzene by NC and O2 by V species of IL-POM. This work suggests a new green reaction pathway toward heterogeneous aerobic hydroxylation of the Csp2-H bond in π-conjugated aromatic molecules.
44 citations