Solid state voltammetry of an anthraquinone molten salt

Mary Elizabeth Williams, Royce W. Murray

Research output: Contribution to journalArticlepeer-review

14 Scopus citations

Abstract

The solid-state voltammetries of the two reduction steps of a novel redox polyether hybrid - an anthraquinone molten salt (triethyl(MePEG350)ammonium anthraquinone sulfonate, (Et3NMePEG350+)(AQSO3-)) - and its disulfonated analogue, are reported. Multiple effects on charge transport rates are encountered. Currents for the first reduction step are enhanced by electron self-exchange charge transport, whereas currents for the second reduction wave are greater than 10-fold smaller. The relative charge transport rates of the two reductions are examined as a function of temperature and of incrementally replacing the AQSO3- anion in the melt with the electroinactive BF4- anion. An analysis that includes ionic conductivity measurements shows that the apparent charge transport rate of the second anthraquinone reduction is attenuated primarily as a result of ionic migration of the products of comproportionation reactions occurring in the diffusion layer.

Original languageEnglish (US)
Pages (from-to)10221-10227
Number of pages7
JournalJournal of Physical Chemistry B
Volume103
Issue number46
DOIs
StatePublished - Nov 18 1999

All Science Journal Classification (ASJC) codes

  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films
  • Materials Chemistry

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