pH-directed polyoxometalate-based supramolecular framework for effectively electrochemical sensing IO3⁻ from glycerol oxidation wastewater

Journal of Molecular Structure, Journal Year: 2025, Volume and Issue: unknown, P. 141679 - 141679

Published: Feb. 1, 2025

Language: Английский

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A 3D supramolecular framework with electron-deficient-carboxylate-functionalized [γ-Mo8O26]-subunits for catalytic epoxidation of alkenes and electrochemical detection of sunset yellow

Journal of Molecular Structure, Journal Year: 2025, Volume and Issue: unknown, P. 142176 - 142176

Published: March 1, 2025

Language: Английский

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Two-Dimensional Layer {P₄Mo₆} Clusters Constructed with N-Ligands for Bifunctional Properties of Proton Conduction and Supercapacitors

Inorganic Chemistry, Journal Year: 2025, Volume and Issue: 64(1), P. 443 - 451

Published: Jan. 2, 2025

Proton exchange membrane fuel cells (PEMFCs) are developing into very meaningful clean energy to fundamentally address environmental pollution. Among which the most studied Nafion series membranes limited under large-scale use, and some strong oxidizing groups such as hydrogen peroxide will attack structure of Nafion, shortening lifespan PEMFCs. Therefore, it is crucial develop a proton-conductive material with stability broad application. In this study, novel hourglass-type P4Mo6-based POMOFs denoted (H2timb)2[Mn3(H3P4Mo6O31)2]·4H2O was synthesized using 1,3,5-tri(1H-imidazole-1-yl)benzene (timb) ligand. It found that CUST-577 exhibited an excellent proton conductivity 8.9 × 10–3 S cm–1 at 80 °C 98% RH (relative humidity), proving conducted by protons. addition, also had greater H2O2 decomposition ability, thereby improving longevity cells. three-electrode system, displayed specific capacitance (Cs) value 308 F g–1 current density 0.15 A g–1, retention 88.3% after 2000 cycles. Since electrolyte can deliver protons for redox reaction various pseudocapacitor (PC) electrode materials, may be promising polyacid-based conductor PC material.

Language: Английский

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A new core-shell heterojunction MIL-53(Fe)@ZnIn2S4 for boosted photocatalytic degradation of tetracycline and reduction of Cr (VI) under visible irradiation

Inorganic Chemistry Communications, Journal Year: 2025, Volume and Issue: unknown, P. 114134 - 114134

Published: Feb. 1, 2025

Language: Английский

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Mechanochemically Driven C–C Bond Formation via Cu-Complex-Functionalized Polyoxoniobate under Solvent-Free Conditions

Crystal Growth & Design, Journal Year: 2025, Volume and Issue: 25(5), P. 1636 - 1643

Published: Feb. 19, 2025

Developing a mechanochemical, solvent-free approach for forming C–C bonds in place of traditional solvent-based synthesis is significant green chemistry. Herein, novel Cu-complex-functionalized polyoxoniobate-based hybrid material [Cu(tpy)2]{[Cu(tpy)(H2O)]2[Nb10O28]}·5.5H2O (1, tpy = 2,2′:6′,2″-terpyridine) successfully synthesized and thoroughly characterized. 1 displays excellent thermal solvent stability highly mechanical force tolerant. Catalytic studies reveal that can catalyze the Knoevenagel condensations series aromatic aldehydes with malononitrile to build bond compounds under mechanochemical ball milling conditions. The catalytic system conducted no additional heating, lower oscillating frequency, without solvent. remarkable performance catalyst be attributed two factors: one sufficient contact between reagents facilitated by force, as well preactivated it; other synergistic effect Lewis acid–base sites (Cu2+ [Nb10O28]6–) within catalyst. exhibits outstanding recyclability applied gram-scale reactions. To best our knowledge, this work represents first example mechanochemically driven organic transformation using polyoxometalate-based

Language: Английский

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Visible-light-mediated oxidation of saturated C(sp3)-H bonds over [W10O32]4−-POMOFs

Journal of Catalysis, Journal Year: 2025, Volume and Issue: unknown, P. 116088 - 116088

Published: March 1, 2025

Language: Английский

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Solventless Heterogeneous Catalysis with [P₂Mo₅O₂₃]^6–-Based Complexes: Achieving High-Efficiency and Rapid Oxidation of C–H Bonds

Inorganic Chemistry, Journal Year: 2025, Volume and Issue: unknown

Published: March 19, 2025

The oxidation of C-H bonds holds paramount importance in the realms organic synthesis and industrial chemistry. However, conventional methods are fraught with environmental concerns economic drawbacks. Consequently, heterogeneous catalysis solvent-free reactions have emerged as focal points research. This work reports two polyoxometalates-based complexes incorporating [P2Mo5O23]6- ({P2Mo5}) unit catalysts for bond oxidation: (CuIL2)4[H2(P2Mo5O23)]·H2O (1) (HL)6(P2Mo5O23)·H2O (2) (L = benzimidazole), which exhibit similar stacking modes but obvious structural differences: ligands L coordinated Cu ions to form {CuIL2} subunits complex 1, while 2 has fully protonated L. Notably, 1 demonstrated exceptional catalytic activity compared 2, efficiently oxidizing diphenylmethane (DPM) absence solvent achieving conversion rates high 99.5% selectivity benzophenone (BP) 100% within 6 h. reasons their different performances were unveiled. More importantly, even when reaction was scaled up by 10-fold (with amount substrate DMP reaching 10 mmol), still maintained activity, highlighting its substantial potential applications.

Language: Английский

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In Situ Carboxylate-Functionalized {Mo₁₂O₃₈}^4–-Based Three-Dimensional Supramolecular Framework as a Copper-Triggered Heterogeneous Catalyst for Alkene Oxidation

Inorganic Chemistry, Journal Year: 2025, Volume and Issue: unknown

Published: May 3, 2025

It is of great research value to develop an efficient and stable catalyst that can achieve the oxidation alkenes obtain epoxides, which serve as a multifunctional intermediate with important commercial value. Based on this, three-dimensional (3D) supramolecular framework H[CuI(H3bdcbpy)2(Mo12O38)(H2O)] (1, H4bdcbpy·2Cl = N,N'-bis(3,5-dicarboxybenzyl-4,4'-bipyridine·dichloride) was obtained from carboxylate-functionalized 1D coordination polymers, were derived unusual in situ [Mo12O38]4- cluster Cu-electron-deficient carboxylate complex units. The catalytic performance 1 epoxidation using TBHP examined, revealing its remarkable efficiency conversion cis-cyclooctene, high rate 99% outstanding selectivity 100%. Complex exhibited higher activity than unmodified H4bdcbpy·2Cl, CuCl2·2H2O, Na2MoO4·2H2O, well most previously reported polyoxometalate (POM)-based metal-organic complexes (POMOCs). Moreover, reaction kinetics mechanism explored free radical trapping experiments control experiments. stability also investigated.

Language: Английский

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Visible‐Light‐Driven Efficient Photocatalytic Reduction of Cr(VI) in a Wide pH Range by Two New Isopolymolybdate‐Based Ni(II)‐Complexes

European Journal of Inorganic Chemistry, Journal Year: 2024, Volume and Issue: unknown

Published: Oct. 31, 2024

Abstract The development of new catalytic materials for the fast and efficient photocatalytic reduction toxic Cr(VI) to less Cr(III) across a wide pH range water environment has become one most challenging topics. Herein, two isopolymolybdate‐based Ni(II)‐complexes [Ni II (bcbpy) 2 (β‐Mo 8 O 26 ) 0.5 (H O)] ⋅ 4H ( BHU‐5 [θ‐Mo ] BHU‐6 , Hbcbpy=1‐(4‐carboxybenzyl)‐4,4′‐bipyridinium) were synthesized via hydrothermal reaction with mixture Na MoO 4 2H O, NiCl 6H HbcbpyCl ligands. Single‐crystal X‐ray diffraction analysis displays that contain binuclear nickel‐bcbpy units, which in association different isopolymolybdates, forming distinct 1D chain 2D layer network structures, respectively. When used as photocatalysts Cr(VI), exhibited activities, achieving removal efficiencies 92 % 98 under visible light irradiation within 45 min. These surpass those pristine HbcbpyCl, reported polymolybdate‐based catalysts. Moreover, demonstrated high removing maintained structural stability 3.5–11.5. influence structures on efficiency was further studied. mechanism kinetics investigated detail.

Language: Английский

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A New Bis-Keggin Polyoxometallate-Based Bifunctional Catalyst for Efficient Electrochemical Sensing and Photocatalytic Reduction of Cr(VI)

Russian Journal of General Chemistry, Journal Year: 2024, Volume and Issue: 94(11), P. 3090 - 3098

Published: Nov. 1, 2024

Language: Английский

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