Magnetic Mesoporous Silica Nanocomposite Functionalized with Palladium Schiff Base Complex: Synthesis, Characterization, Catalytic Efficacy in the Suzuki–Miyaura Reaction and α-Amylase Immobilization
| Autor: | Ameneh Ahmadi, Hossein Motamedi, Roya Azadi, Tahereh Sedaghat |
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| Rok vydání: | 2019 |
| Předmět: |
Schiff base
Nanocomposite Immobilized enzyme 010405 organic chemistry Chemistry chemistry.chemical_element General Chemistry Mesoporous silica 010402 general chemistry 01 natural sciences Catalysis 0104 chemical sciences chemistry.chemical_compound Phenylboronic acid Mesoporous material Nuclear chemistry Palladium |
| Zdroj: | Catalysis Letters. 150:112-126 |
| ISSN: | 1572-879X 1011-372X |
| Popis: | Magnetic mesoporous silica nanocomposite, Fe3O4-MCM-41, was functionalized with N-(2-aminoethyl)-3-aminopropyltrimethoxysilane (AEAPS) and then condensed with 5,5′-methylene bis(salicylaldehyde), followed by N(4)-phenylthiosemicarbazide to produce a ONS Schiff base grafted nanocomposite. Finally, by adding palladium(II) acetate, the palladium Schiff base complex was immobilized on magnetic nanocomposite. The characterization of new nanocomposites was carried out by means of several techniques such as FT-IR, XRD, FE-SEM, HRTEM, EDS, BET, VSM, XPS, DRS and TGA. The new nanocatalyst, Fe3O4@MCM-41-SB-Pd, was used in synthesis of symmetrical and unsymmetrical biaryl compounds via the Suzuki–Miyaura cross-coupling of phenylboronic acid with aryl halides. This catalyst was easily recovered by applying an external magnetic field and reused for several times without significant loss of its catalytic activity. Also the ability of synthesized mesoporous nanocomposites for enzyme immobilization was investigated and results showed that they efficiently immobilized α-amylase enzyme. |
| Databáze: | OpenAIRE |
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