An organic–inorganic hybrid polyoxoniobate decorated by a Co(iii)-amine complex for electrocatalytic urea splitting

Inorganic Chemistry Frontiers, Journal Year: 2023, Volume and Issue: 10(16), P. 4789 - 4796

Published: Jan. 1, 2023

A polyoxoniobate decorated by Co( iii )-amine complex, Na 4 (H 2 O) 15 [Co(en) 3 ] {[Co(en)(Nb 6 O 19 )] }·34H exhibits remarkable catalytic activity for urea oxidation reaction after being firmly attached to the surface of acetylene black polyethyleneimine.

Language: Английский

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A double-tartrate-bridged deca-nuclearity europium-tungsten cluster embedded selenotungstate and its selective optical sensing of o-nitrophenol

Polyoxometalates, Journal Year: 2023, Volume and Issue: 2(4), P. 9140041 - 9140041

Published: Oct. 12, 2023

An inorganic–organic hybrid Eu–W-implanted tartrate-connected selenotungstate tetramer {[Eu₄(H₂O)₁₂W₆O₁₂ (tar)₂][B-α-SeW₉O₃₃]₄}^16– (1a, H₄tar = tartaric acid) was successfully obtained by introducing the flexible multidentate tartrate ligand into Se-templated lacunary polyoxometalate (POM) and lanthanide (Ln) system. 1a comprises two equivalent penta-nuclear Eu₂W₃-cluster-encapsulated {[Eu₂(H₂O)₆W₃O₆][B-α-SeW₉O₃₃]₂}^4– dimeric units in an ''open C-shaped'' arrangement that are gathered together double tetra-dentate tar^4– linkers. Besides, exhibits remarkable stability strong photoluminescence (PL) emission aqueous medium, which is able to distinguish toxic chemical pollutants, o-nitrophenol (o-NP) from its isomers m-nitrophenol (m-NP) p-nitrophenol (p-NP), especially achieving highly selective sensitive discrimination of o-NP with a low detection limit 0.73 μM. The practical application probe realized lake water good recoveries. PL sensing mechanism involving static quenching competitive absorption elucidated finally. This work paves way for designed synthesis novel organic Ln-functionalized POM hybrids further exploration materials recognizing environmental pollutants.

Language: Английский

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Hierarchically Structured Nanocomposites via Mixed-Graft Block Copolymer Templating: Achieving Controlled Nanostructure and Functionality

Journal of the American Chemical Society, Journal Year: 2023, Volume and Issue: 146(1), P. 567 - 577

Published: Dec. 20, 2023

Integrating inorganic and polymerized organic functionalities to create composite materials presents an efficient strategy for the discovery fabrication of multifunctional materials. The characteristics these composites go beyond a simple sum individual component properties; they are profoundly influenced by spatial arrangement components resulting homo-/hetero-interactions. In this work, we develop facile highly adaptable approach crafting nanostructured polymer–inorganic composites, leveraging hierarchically assembling mixed-graft block copolymers (mGBCPs) as templates. These mGBCPs, composed diverse polymeric side chains that covalently tethered with defined sequence linear backbone polymer, self-assemble into ordered hierarchical structures independently tuned nano- mesoscale lattice features. Through coassembly mGBCPs diversely sized fillers such metal ions (ca. 0.1 nm), oxide clusters (0.5–2 metallic nanoparticles (>2 three-dimensional filler arrays controlled interfiller separation arrangement. Multiple types simultaneously integrated mGBCP matrix introducing orthogonal interactions between distinct chains. This results in nanocomposites where each type is selectively segregated specific nanodomains matrix-defined orientations. developed offers versatile scalable pathway structured nanocomposites, unlocking new possibilities advanced fields optoelectronics, sensing, catalysis.

Language: Английский

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Fabrication of A Multi‐functional Separator Incorporating Crown ether‐ Polyoxometalate Supramolecular Compound for Lithium‐Sulfur Batteries

Chemistry - A European Journal, Journal Year: 2024, Volume and Issue: 30(58)

Published: Aug. 6, 2024

Abstract Recently, research on polyoxometalates (POMs) has gained significant momentum. Owing to their properties as electronic sponges, POMs catalyst harbor substantial potential in lithium‐sulfur battery research. However, undergo a transformation into reduced heteropoly blue (HPB) during electrochemical reactions, which then dissolve the electrolyte, resulting loss. In this research, we amalgamated 18‐crown‐6 (CR6) with K 3 PW 12 O 40 , (KPW), synthesized novel POM‐based supramolecular compound, and integrated it graphene oxide (GO) fabricate multi‐functional composite polypropylene (PP) separator KPW‐CR6/GO/PP. The crown ether array was employed immobilize POM construct ion transport channels, thereby enhancing Li + migration rate capturing polysulfides. Subsequently, leveraging stable structure redox of POM, polysulfide is catalyzed transform inhibit shuttle effect, protecting anode. batteries Crown ether‐POM compound separators, exhibit enhanced capacity stability (1073.3 mAh g −1 at 1.0 C, 81.5 % retention after 250 cycles). (S loading: 3.2 mg cm −2 ) presents an initial specific discharge 543.4 0.5 89.8 retained 160 cycles. This underlines practical application materials Li−S batteries.

Language: Английский

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Synthesis of a Lindqvist type polyoxometalate-iron Hybrid Catalyst for the Synthesis of Benzimidazole Compounds

Journal of Inorganic and Organometallic Polymers and Materials, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 13, 2025

Language: Английский

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