Molecular dynamics simulation of fluorination effect for solvation of trifluoromethylbenzoic acid isomers in supercritical carbon dioxide

H. Higashi, Y. Iwai, K. Miyazaki, Y. Arai

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Abstract

A molecular dynamics (MD) simulation was applied to carbon dioxide + trifluoromethylbenzoic acid isomer and carbon dioxide + methylbenzoic acid isomer systems to investigate the interactions between carbon dioxide and the solutes. The pair correlation functions between the carbon dioxide and trifluoromethyl group or methyl group in the solutes were calculated to study the fluorination effect of solvation. As a result, it was found that the interactions between carbon dioxide and trifluoromethyl group in trifluoromethylbenzoic acid isomers were stronger than those between carbon dioxide and the methyl group in methylbenzoic acid isomers. The simulation results had the same tendency as the experimental solubility enhancements and coincided with the trend of the interaction parameters of the Peng-Robinson equation of state that were determined from the solubility data.

Original languageEnglish
Pages (from-to)725-730
Number of pages6
JournalMolecular Simulation
Volume31
Issue number10
DOIs
Publication statusPublished - Aug 30 2005

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All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Information Systems
  • Modelling and Simulation
  • Chemical Engineering(all)
  • Materials Science(all)
  • Condensed Matter Physics

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