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MWCNT incorporated silica aerogel prepared by ambient pressure drying: A recyclable catalyst for multicomponent synthesis of benzylpyrazolyl coumarin at room temperature | ||
Iranian chemical communication | ||
مقاله 3، دوره 6، Issue 1, pp. 1-108, Serial No. 18، فروردین 2018، صفحه 19-29 اصل مقاله (803.3 K) | ||
نوع مقاله: Original Research Article | ||
نویسندگان | ||
Isak Rajjak Shaikh* 1؛ Noor Mahmad Nabisaheb Maldar2؛ Caroline Sunyong Lee3؛ Rajendra Charandeo Pawar3؛ Hyung-Ho Park4؛ Uzma Khwaja-Husain Bangi5 | ||
1School of Chemical Sciences, Swami Ramanand Teerth Marathwada University (SRTMU), Vishnupuri, Nanded – 431 606 (Maharashtra) India | ||
2Solapur University, Solapur (Maharashtra) India | ||
3Hanyang University ERICA campus, 5th Engineering Building, 55 Hanyangdaehak-ro, Sangrok-gu Ansan-si, Gyeonggi-do 426-791, South Korea | ||
4Department of Materials Science and Engineering, Yonsei University, Seodaemun-gu, Seoul 120-749, Republic of Korea | ||
5School of Physical Sciences, Solapur University, Solapur city (Maharashtra) India | ||
چکیده | ||
Multiwalled Carbon Nanotube (MWCNT) reinforced silica aerogel was synthesized in a very simple and cost effective sol - gel method. The process was followed by ambient pressure drying, and then the aerogel material was characterized by XRD, BET, SEM, EDX and FT-IR. 2.3 x 10-3 wt% MWCNTs were successfully incorporated in sodium silicate based silica aerogel. This metal-free nanocomposite catalyzed a four component organic reaction among 4-hydroxy coumarin, benzaldehyde, phenyl hydrazine, and ethyl acetoacetate for synthesizing medicinally important benzylpyrazolyl coumarin at room temperature. The MWCNT/silica aerogel composite material having easy accessible active sites and high catalytic activity was easily recovered and reused. The aerogel composite when impregnated with ceria offered very efficient and selective reaction methodology. | ||
کلیدواژهها | ||
MWCNT/Silica aerogel؛ ambient pressure drying؛ MWCNT/Silica aerogel heterogeneous catalysis؛ multicomponent reaction؛ benzylpyrazolyl coumarin | ||
مراجع | ||
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