Cu(II)-grafted 2D-hexagonal mesoporous material as an efficient catalyst for Sonogashira C-C cross-coupling reaction
Autor: | Sujoy Mukherjee, Sauvik Chatterjee, Tapas Sen, Luna Paul, Asim Bhaumik |
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Rok vydání: | 2021 |
Předmět: |
010302 applied physics
Materials science Sonogashira coupling 02 engineering and technology 021001 nanoscience & nanotechnology Heterogeneous catalysis 01 natural sciences Coupling reaction Catalysis X-ray photoelectron spectroscopy 0103 physical sciences Fourier transform infrared spectroscopy 0210 nano-technology High-resolution transmission electron microscopy Mesoporous material Nuclear chemistry |
Zdroj: | Materials Today: Proceedings. 45:3733-3740 |
ISSN: | 2214-7853 |
Popis: | Replacing expensive Pd-catalysts by a low cost and sustainable catalytic system is one of the major challenging areas of research in synthetic organic chemistry. Herein, we report a new Cu(II)-anchored mesoporous catalyst (SBA-NH2-L-Cu) by immobilizing Cu(II) over organic ligand (L) anchored amino functionalized mesoporous SBA-15 (SBA-NH2-L) material. SBA-NH2-L-Cu has been characterized by different physicochemical techniques like powder X-ray diffraction (PXRD), Fourier-transform infrared (FTIR), high resolution transmission electron microscopy (HRTEM), N2 sorption, X-ray photoelectron spectroscopy (XPS), electron paramagnetic resonance (EPR) and thermo-gravimetric analysis (TGA). SBA-NH2-L-Cu has been employed as an efficient heterogeneous catalyst in the Sonogashira C–C cross-coupling reaction for the synthesis of aromatic alkynes in the 1: 1 solvent mixture of 1,4-dioxan and water in the presence of K2CO3 base and very minor amount of Pd/C (5% on active charcoal, 0.25 mol%) as co-catalyst at 80 °C in 4 h reaction time. The catalyst is easy to handle and recycled for several times without any significant loss in catalytic activity. |
Databáze: | OpenAIRE |
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