MWCNT incorporated silica aerogel prepared by ambient pressure drying: A recyclable catalyst for multicomponent synthesis of benzylpyrazolyl coumarin at room temperature
Publish place: Iranian Chemical Communication، Vol: 6، Issue: 1
Publish Year: 1396
نوع سند: مقاله ژورنالی
زبان: English
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شناسه ملی سند علمی:
JR_ICC-6-1_003
تاریخ نمایه سازی: 2 مهر 1398
Abstract:
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.
Keywords:
MWCNT/Silica aerogel , ambient pressure drying , MWCNT/Silica aerogel heterogeneous catalysis , multicomponent reaction , benzylpyrazolyl coumarin
Authors
Isak Rajjak Shaikh
School of Chemical Sciences, Swami Ramanand Teerth Marathwada University (SRTMU), Vishnupuri, Nanded – ۴۳۱ ۶۰۶ (Maharashtra) India
Noor Mahmad Nabisaheb Maldar
Solapur University, Solapur (Maharashtra) India
Caroline Sunyong Lee
Hanyang University ERICA campus, ۵th Engineering Building, ۵۵ Hanyangdaehak-ro, Sangrok-gu Ansan-si, Gyeonggi-do ۴۲۶-۷۹۱, South Korea
Rajendra Charandeo Pawar
Hanyang University ERICA campus, ۵th Engineering Building, ۵۵ Hanyangdaehak-ro, Sangrok-gu Ansan-si, Gyeonggi-do ۴۲۶-۷۹۱, South Korea
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