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Title: Carboxylic acid-grafted mesoporous material and its high catalytic activity in one-pot three-component coupling reaction

A new carboxylic acid functionalized mesoporous organic polymer has been synthesized via in situ radical polymerization of divinylbenzene and acrylic acid using a mesoporous silica as a seed during the polymerization process under solvothermal conditions. The mesoporous material MPDVAA-1 has been thoroughly characterized employing powder XRD, solid state {sup 13}C cross polarization magic angle spinning-nuclear magnetic resonance, FT-IR spectroscopy, N{sub 2} sorption, HR-TEM, and NH{sub 3} temperature programmed desorption-thermal conductivity detector (TPD-TCD) analysis to understand its porosity, chemical environment, bonding, and surface properties. The mesoporous polymer was used as a catalyst for a three comp onent Biginelli condensation between various aldehydes, β-keto esters, and urea/thioureas to give 3,4-dihydropyrimidine-2(1H)-ones. The reactions were carried out under conventional heating as well as solvent-free microwave irradiation of solid components, and in both the cases, the mesoporous polymer MPDVAA-1 proved to be a powerful, robust, and reusable catalyst with high catalytic efficiency.
Authors:
;  [1] ;  [2]
  1. Department of Materials Science, Indian Association for the Cultivation of Science, Jadavpur, Kolkata 700032 (India)
  2. Department of Chemical Engineering, National Taiwan University, Taipei 10617, Taiwan (China)
Publication Date:
OSTI Identifier:
22303410
Resource Type:
Journal Article
Resource Relation:
Journal Name: APL Materials; Journal Volume: 2; Journal Issue: 11; Other Information: (c) 2014 Author(s); Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; ACRYLIC ACID; ALDEHYDES; CATALYSTS; DESORPTION; DIVINYLBENZENE; EFFICIENCY; FOURIER TRANSFORMATION; INFRARED SPECTRA; NANOSTRUCTURES; NUCLEAR MAGNETIC RESONANCE; ORGANIC POLYMERS; POLYMERIZATION; SILICA; SOLIDS; SURFACE PROPERTIES; THERMAL CONDUCTIVITY; THIOUREA; TRANSMISSION ELECTRON MICROSCOPY; X-RAY DIFFRACTION