Anion effect on the electrochemistry of TTF in polymer solvent

lCyclic voltammetry of a solid polymer solution of a tetrathiafulvalene (TT F) derivative showed different behaviours depending on the nature of the el ectrolyte anion. A lower potential and current peak for the second redox re action in the presence of perchlorate revealed a specific interaction betwe en this anion and the TTF dication. This effect also indicates a coupling b etween the physical diffusion and electron self-exchange during the voltamm etric scan. No interaction between the TTF dication and triflimide or TFSI- bis (trifluoromethanesulfonyl) imide-anion was observed. This confirms the exceptional softness of this anion and underlines the role that the nature of the electrolyte anion could play on both the ionic and the electronic co nductivities of the electrode polymer materials. (C) 2001 Elsevier Science B.V. All rights reserved.