Electrochemical characterisation of an Os (II) conjugated polymer in aqueous electrolytes

Timothy McCormac, John F. Cassidy, Karl Crowley, Lise Trouillet, Frédéric Lafolet, Stéphané Guillerez

Research output: Contribution to journalArticlepeer-review

Abstract

The electrochemical behaviour of an Os (II) complex of the structurally well-defined conjugated polymer alternating regioregularly alkylated thiophene and 2,2′-bipyridine units (P4Os) has been elucidated in aqueous solution. In typical aqueous electrolyte systems, the cyclic voltammogram of the resulting P4Os film exhibits a one-electron reversible process corresponding to the Os3+/2+ redox system. However, the observance of this reversible couple did depend upon the concentration of the supporting electrolyte. It was found that the Os3+ form did form ion-pairs with an anion from the electrolyte solution. Preliminary investigations into the homogeneous charge transport dynamics associated with this redox couple have been undertaken. The technique of cyclic voltammetry, and hence the Randles-Sevick expression, in conjunction with platinum microelectrodes have been employed to determine the sqrt(DCT) C value.

Original languageEnglish
Pages (from-to)3484-3488
Number of pages5
JournalElectrochimica Acta
Volume51
Issue number17
DOIs
Publication statusPublished - 25 Apr 2006

Keywords

  • Charge transport
  • Osmium
  • Polythiophenes

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