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Title: Synthesis of quinolines from glycerol over tungstic acid functionalized mesoporous KIT-6 catalyst in aqueous medium
Authors: Udayakumar, V
Pandurangan, A
Keywords: Catalysts;Mesoporous catalysts;Functionalized catalysts;Skraup synthesis;W/KIT-6;Quinoline;Glycerol
Issue Date: Aug-2016
Publisher: NISCAIR-CSIR, India
Abstract: Mesoporous tungstic acid functionalized KIT-6 has been synthesized through a condensation of (3-chloropropyl) triethoxysilane and Si-KIT-6 followed by substitution of chloromethylation functionalized KIT-6 by sodium tungstate dihydrate. The synthesized tungstic acid functionalized KIT-6 (W-KIT-6) was characterized by low and wide angle X-ray diffraction analysis (XRD), N2 adsorption-desorption isotherm, scanning electron microscope (SEM), transmission electron microscope (TEM), X-ray photoelectron spectroscopy (XPS), NH3-temperature programmed desorption (NH3-TPD), 13C CP/MAS NMR spectrum and FT-IR analysis. The functionalized KIT-6 posses surface area of 663 m2/g with corresponding pore size 6.3 nm and pore volume 0.65 cm3/g. The catalytic activity of W-KIT-6 nanoparticles evaluated in the Skraup synthesis of quinoline and its derivatives using water as solvent, the results show the target compound was obtained as 89% yield with complete conversion of glycerol (100%) under the reaction conditions of 200 oC for 3 h. The catalyst has been recycled for five times without significant loss in catalytic activity.
Page(s): 919-928
ISSN: 0975-0975(Online); 0376-4710(Print)
Appears in Collections:IJC-A Vol.55A(08) [August 2016]

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