An FT-IR study on Diels-Alder reactions catalysed by heteropoly acid containing sol-gel silica

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5 Citations (Scopus)

Abstract

Following the general trend of using heterogeneous catalysts whenever possible, the replacement of traditional homogeneous Lewis acid catalysts for the Diels-Alder reaction is currently considered in the literature. In this contribution, we report the successful application of sol-gel derived tungstophosphoric acid-silica composites as catalysts in the reaction of 1,3-cyclohexadiene and 2-propenal. The reaction was monitored by in situ FT-IR spectroscopy following the changes in the fine structure of the v(C=O) band. The catalytic activity of the sol-gel immobilised heteropoly acids seems to be comparable with that of more conventional sol-gel silica-aluminas and their selectivity is even better because Broensted acid sites are destroyed upon calcination of the dry gel.

Original languageEnglish
Pages (from-to)121-124
Number of pages4
JournalJournal of Molecular Structure
Volume565-566
DOIs
Publication statusPublished - May 30 2001

Keywords

  • Diels-Alder reaction
  • FT-IR spectroscopy
  • Heterogeneous catalysis
  • Sol-gel method
  • Tungstophosphoric acid

ASJC Scopus subject areas

  • Analytical Chemistry
  • Spectroscopy
  • Organic Chemistry
  • Inorganic Chemistry

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