Electrochemistry in Near-Critical and Supercritical Fluids. 8. Methyl Viologen, Decamethylferrocene, Os(bpy)3(2+) and Ferrocene in Acetonitrile and the Effect of Pressure on Diffusion Coefficients under Supercritical Conditions

Abstract

The cyclic voltammetry (CV) of methyl viologen (MV2+), decamethylferrocence (DMFc), Os(bpy)3(2+) (bpy+2,2'-bipyridine) and ferrocene (Fc) was studied at high temperatures and pressures in a small cell (7.5 ml) where the pressure and temperature could be varied independently. While the CV of MV(2+) and OS(bpy)3(3+) remained well-behaved with reversible of quasi- reversible waves only into the near-critical region (up to ca 230 C), Fc and DMFc showed well-defined behavior under supercritical conditions. The diffusion coefficient of ferrocene was measured at a supercritical temperatures (280 C) as a function of pressure, and the experimental results were correlated to values calculated by the Stokes-Einstein relation.

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Document Details

Document Type
Technical Report
Publication Date
Jul 20, 1989
Accession Number
ADA213407

Entities

People

  • Allen J. Bard
  • Carlos R. Cabrera

Organizations

  • University of Texas at Austin

Tags

Communities of Interest

  • Materials and Manufacturing Processes

DTIC Thesaurus Topics

  • Acetonitrile
  • Chemical Synthesis
  • Chemistry
  • Coefficients
  • Conductivity
  • Dielectric Permittivity
  • Diffusion Coefficient
  • Electrochemistry
  • Ferrocenes
  • Fluids
  • High Pressure
  • High Temperature
  • Liquids
  • Measurement
  • Military Research
  • Nitriles
  • Redox Indicators

Fields of Study

  • Chemistry

Readers

  • Aerodynamics/Aeronautics.
  • Electrochemical Surface Science