Tailor-Made POLITAG-Pd⁰ Catalyst for the Low-Loading Mizoroki–Heck Reaction in γ-Valerolactone as a Safe Reaction Medium

ACS Sustainable Chemistry & Engineering, Journal Year: 2022, Volume and Issue: 10(37), P. 12386 - 12393

Published: Sept. 1, 2022

In this contribution, we have reported our study on the fine-tuned design and synthesis of new POLITAGs-Pd0 (POLymeric Ionic TAG) catalytic systems with intention defining highly efficient heterogeneous palladium catalysts stabilized by ionic tags able to operate at a very low loading while being fully recoverable/reusable. By varying both support ratio between metal immobilized tag, accessed five different that been characterized (EA, XPS, TEM, HR-TEM) investigate their morphological differences. The efficiency newly prepared materials was then tested compared in representative Mizoroki–Heck cross-coupling reaction, universally investigated widely useful process. A close correlation catalyst performances has highlighted. best system POLITAG-Pd0-HM features high TOF value (26,786 h–1), affording final products isolated yields using as little only 0.0007 mol % Pd. Moreover, activity coupled use γ-valerolactone (GVL) green reaction medium led definition waste-minimized protocol. designed utilized Amiloxate, used sunscreen agent, could be negligible contamination E-factor.

Language: Английский

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Copper Immobilized over 2D Hexagonal SBA-15 for Electrochemical and Colorimetric Sulfite Sensing

Inorganic Chemistry, Journal Year: 2023, Volume and Issue: 62(29), P. 11426 - 11435

Published: July 7, 2023

Sulfite (SO32-) is considered a highly toxic anion for living organisms. Herein, we report the synthesis of copper immobilized over 2D hexagonally ordered mesoporous silica material CuMS as an electrochemical and colorimetric dual-technique-based sensing platform sulfite detection. The immobilization on was achieved through bis[3-(triethoxysilyl)propyl]tetrasulfide (TEPTS) ligand. Morphological physical properties were confirmed by several characterization techniques, including scanning electron microscopy, transmission X-ray diffraction, N2 sorption, photoelectron spectroscopy. retained mesoporosity with narrow pore size distribution (D ≈ 5.4 nm) high Brunauer-Emmett-Teller surface area 682 m2 g-1 after copper. prepared catalyst shows promising electrocatalytic activity toward oxidation. A linear variation in peak current obtained SO32- oxidation 0.2-15 mM range sensitivity 62.08 μA cm-2, under optimum experimental conditions. limit detection (LOD) found to be 1.14 nM. also excellent anions LOD 0.4 proposed sensor selectivity anion, even presence common interferents. white wine recovery demonstrates practical applicability this sensor.

Language: Английский

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Recent Progress in Pd-Catalyzed Tandem Processes

Catalysts, Journal Year: 2023, Volume and Issue: 13(8), P. 1213 - 1213

Published: Aug. 15, 2023

In recent years, Pd-containing catalytic systems for tandem processes have gained special attention due to their enhanced properties and possibility of performing several reactions without the necessity separating intermediates. this review, progress in Pd-catalyzed is considered. Three types are described: homogeneous catalysts (including immobilized Pd complexes); heterogeneous supported on oxides, MOFs, COFs, etc., with particular supports containing acid/base sites; metal-enzyme chemoenzymatic applied fine organic synthesis biotechnology. For reactions, different were considered, i.e., cross-coupling, cyclization, carbonylation, isomerization, alkylation, arylation, etc.

Language: Английский

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Recent Progress in Pd-Catalyzed Tandem Processes

Published: July 11, 2023

In recent years Pd-containing catalytic systems for tandem processes has drawn special attention due to the enhanced properties and possibility perform several reactions without necessity separate intermediates. this review, progress in Pd-catalyzed is considered. Three types of were described: homogeneous catalysts (including immobilized Pd complexes); heterogeneous supported on oxides, MOFs, COFs, etc. with particular supports containing acid/base sites; metal-enzyme chemoenzymatic applied fine organic synthesis biotechnology. For different considered, i.e. cross-coupling, cyclization, carbonylation, isomerization, alkylation, arylation,

Language: Английский

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Continuous Flow aqueous tandem conversion of trans-ferulic acid into high added value chemicals

Results in Engineering, Journal Year: 2024, Volume and Issue: unknown, P. 103827 - 103827

Published: Dec. 1, 2024

Language: Английский

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