The oxidation of silanes into silanols is a very necessary transformation, and yet the rational fabrication of efficient catalysts for this reaction remains a challenging task. Here, a 3D polyoxometalate-based metal-organic framework (POMOF), [Cu(pz){PMoO}]·HO (, HENU = Henan University; pz = pyrazine) was consciously prepared and first employed in the oxidation of dimethylphenylsilane with -butyl hydroperoxide (TBHP) as an oxidant, achieving 89% yield at a production rate of 132 mmol·g·h. Control experiments indicated that polyoxometalates and Cu atoms together affected the ultimate outcome in this catalytic system, and the designed catalyst followed a free radical mechanism.
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http://dx.doi.org/10.1021/acs.inorgchem.1c03835 | DOI Listing |
Inorg Chem
January 2025
Henan Key Laboratory of Polyoxometalate Chemistry, College of Chemistry and Molecular Sciences, Henan University, Kaifeng, Henan 475004, P. R. China.
Developing new photocatalysts for the selective oxidation of thioethers to high-value-added sulfoxides under low-oxygen mild conditions is a promising but challenging strategy. Here, a new polyoxometalate-based metal-organic framework (POMOF), , was successfully synthesized, wherein continuous π···π stacking interactions and direct coordination bonds not only strengthen the framework's stability but also accelerate electron transfer. A series of experiments and theoretical studies, including control experiments, kinetic studies, electrochemical spectroscopic analyses, and electron paramagnetic resonance, revealed the synergistic catalytic effect among Co(II) metal centers, BWO, and the photosensitizer TPT.
View Article and Find Full Text PDFDalton Trans
January 2025
Key Laboratory of Optoelectronic Chemical Materials and Devices, Ministry of Education, College of Optoelectronic Materials and Technology, Jianghan University, Wuhan 430056, P. R. China.
Three isostructural polyoxometalate-based metal-organic frameworks (POMOFs) [MII2(btap)(β-MoO)(HO)]·4HO (M = Co 1, Ni 2, Zn 3) based on octamolybdate and 3,5-bis(1',2',4'-triazol-1'-yl)pyridine (btap) were synthesized the hydrothermal method. POMOFs 1 and 2 and their thermal derivatives could be utilized as efficient electrocatalysts for the oxygen evolution reaction.
View Article and Find Full Text PDFInorg Chem
December 2024
School of Marine Science and Engineering, Hainan University, Haikou 570228, China.
Angew Chem Int Ed Engl
December 2024
State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Chemistry and Chemical Engineering, Donghua University, Shanghai, 201620, P. R. China.
High-nuclearity polyoxometalate (POM) clusters are attractive building blocks (BBs) for the synthesis of metal-organic frameworks (MOFs) due to their high connectivity and inherently multiple metal centers as functional sites. This work demonstrates a strategy of step-wise growth on ring-shaped [PWO] precursor, which produced two new high-nuclearity polyoxotungstates, a half-closed [HPWO] {W} and a fully-closed [HPWO] {W}. By in situ synthesis, unique MOFs of copper triazole-benzoic acid (HL) complexes incorporating the negatively-charged {W} and {W} as nodes, {Cu(HL)W} HNPOMOF-1 and {Cu(HL)W} HNPOMOF-2, were constructed by delicately tuning the reaction conditions, mainly solution pH, which controls the formation of {W} and {W}, and at the same time the protonation of triazole-benzoic acid ligand thus its coordination mode to copper ion that creates the highest nuclearity POM-derived MOFs reported to date.
View Article and Find Full Text PDFInt J Biol Macromol
December 2024
Advanced Light Source Lawrence Berkeley, National Laboratory Berkeley, CA 94720, USA. Electronic address:
Designing potential agents and constructing hydrophilic nano-hydrogel platforms for biomedical and pharmaceutical applications, especially for polyoxometalate-based metal-organic frameworks (PMOF), present both great desirability and significant challenges. A unique open porous Cu(I)-isopolymolybdate-based metal-organic framework (CCUT) has been self-assembled through ionothermal processes for in vivo synergistic anti-cancer therapy. The periodicity of Drugs@CCUT-1 (nano-crystals of CCUT after cation exchange and anti-cancer drugs upload) has been investigated by synchrotron wide-angle X-ray scattering, confirming the lattice structure unchanged.
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