Rotational Diffusion and Trans-cis Isomerization of Substituted Diphenyl Polyenes in the Compressible Region of Supercritical Fluids.

• Kauffman John F.

  Department of Chemistry, University of Missouri

• Wiemers Kathy

  Department of Chemistry, University of Missouri

• Khajehpour Mazdak

  Department of Chemistry, University of Missouri

Bibliographic Information

Other Title

• Rotational Diffusion and Trans-cis Isom

Abstract

We examine rotational diffusion and trans-cis isomerization of two diphenyl polyenes, diphenylbutadiene (DPB) and hydroxymethyl-stilbene (HMS) in supercritical fluid CO₂ and ethane. The results of density dependent rotational diffusion measurements are interpreted using a model which we have recently developed for rotational diffusion in compressible fluids. Comparison of DPB and HMS fluorescence lifetimes indicate that the rate of the isomerization reaction of DPB is nearly independent of density while HMS exhibits a strong density dependence in CO₂. Analysis of the HMS data using Kramers theory indicates that the density dependence is the result of solvent-solute frictional interactions.

Journal

• The Review of High Pressure Science and Technology

  The Review of High Pressure Science and Technology 7 1225-1229, 1998

  The Japan Society of High Pressure Science and Technology

Keywords

• supercritical fluid
• rotational diffusion
• chemical reaction
• time-resolved fluorescence
• viscosity

Details

• CRID: 1390001204382168576
• NII Article ID: 10002693462
• NII Book ID: AN10452913
• DOI: 10.4131/jshpreview.7.1225
• ISSN: 13481940
• ISSN: 0917639X
• NDL BIB ID: 4494199
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I4494199
• Text Lang: en
• Data Source:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
• Abstract License Flag: Disallowed