Novel nano-architectured carbon quantum dots (CQDs) with phosphorous acid tags as an efficient catalyst for the synthesis of multisubstituted 4H-pyran with indole moieties under mild conditions
| Autor: | Masoumeh Hasani, Mahmoud Zarei, Milad Mohammadi Rasooll, Mohammad Ali Zolfigol, Afsaneh Omidi, Yanlong Gu, Hassan Sepehrmansourie |
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| Rok vydání: | 2021 |
| Předmět: |
Thermogravimetric analysis
Materials science Scanning electron microscope General Chemical Engineering Phosphorus acid 02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Catalysis chemistry.chemical_compound chemistry Transmission electron microscopy Pyran Phosphorous acid 0210 nano-technology Nuclear chemistry Malononitrile |
| Zdroj: | RSC Advances. 11:25995-26007 |
| ISSN: | 2046-2069 |
| DOI: | 10.1039/d1ra02515e |
| Popis: | In this work, a new nano-structured catalyst with phosphorus acid moieties, synthesized by the reaction of carbon quantum dots (CQDs) and phosphorus acid under refluxing EtOH. The structure and morphology of CQDs–N(CH2PO3H2)2 were fully characterized using various techniques such as Fourier transform infrared (FT-IR) spectroscopy, transmission electron microscopy (TEM), scanning electron microscopy (SEM), energy dispersive X-ray (EDX) spectroscopy, thermogravimetric (TG) analysis, fluorescence and X-ray diffraction (XRD) measurements. The new CQDs–N(CH2PO3H2)2 catalyst was successfully used for the synthesis of 2-amino-6-(2-methyl-1H-indol-3-yl)-4-phenyl-4H-pyran-3,5-dicarbonitriles by the one-pot reaction of various aromatic aldehydes, 3-(1H-indol-3-yl)-3-oxopropanenitrile derivatives and malononitrile in refluxing EtOH and/or ultrasonic irradiation conditions. |
| Databáze: | OpenAIRE |
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