A new Cu-anchored mesoporous organosilica material for facile C–S coupling reactions under microwave irradiation
Autor: | Piyali Bhanja, Asim Bhaumik, Lanka Satyanarayana, Ruth Gomes |
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Rok vydání: | 2016 |
Předmět: |
010405 organic chemistry
Chemistry Process Chemistry and Technology Inorganic chemistry Imine 010402 general chemistry 01 natural sciences Catalysis Coupling reaction 0104 chemical sciences Mesoporous organosilica chemistry.chemical_compound Adsorption Chemical engineering Magic angle spinning Surface modification Physical and Theoretical Chemistry Mesoporous material |
Zdroj: | Journal of Molecular Catalysis A: Chemical. 415:104-112 |
ISSN: | 1381-1169 |
Popis: | We report a new ordered Cu-anchored 2D-hexagonal mesoporous imine functionalized organosilica material Cu-MPIOS. This Cu-anchored mesoporous material has been synthesized via post synthetic functionalization of SBA-15 with 3-(2-aminoethylamino)propyl-dimethoxymethylsilane followed by Schiff-base condensation with 2-thiophene carboxaldehyde. Cu(I) has been grafted finally over Schiff-base functionalized mesoporous material through chemical impregnation to obtain Cu-MPIOS. The materials are characterized thoroughly using various techniques like powder X-ray diffraction, N2 adsorption/desorption analysis, FTIR, UV–vis spectroscopy, FEG-TEM, FE-SEM, 13C cross-polarization magic angle spinning NMR, TGA/DTA, EPR, AAS and CHN chemical analysis. High Brunauer–Emmett–Teller (BET) surface area and the presence of very large size mesopores (8.1 nm) in Cu-MPIOS has motivated us to explore its catalytic activity in one-pot three-component C–S cross coupling reaction by varying different aryl halides in the aqueous medium under microwave assisted heating conditions. This heterogeneous Cu-catalyst shows high catalytic performance as well as good recycling efficiency in this C–S coupling reaction, suggesting its future potential for the synthesis of value added thioether derivatives. |
Databáze: | OpenAIRE |
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