Solvent effects on the electrochemistry of tetracyanoquinodimethane polymer modified electrodes
The electrochemistry of tetracyanoquinodimethane (TCNQ) modified electrodes in contact with simple alcoholic solvents containing lithium salt electrolytes has been studied. Cyclic voltammetric responses characteristic of each alcohol are obtained for 0.1M LiC1/ROH solutions where R = CH/sub 3/ CH/sub 3/CH/sub 2/ CH/sub 3/CH/sub 2/CH/sub 2/ and CH/sub 3/CH/sub 2/CH/sub 2/CH/sub 2/. Film stability in the -2 oxidation state and persistence on the electrode were greatly improved in the alcohol solvents relative to the behavior in water. Based on the voltammetric responses, reversible and facile swelling of the polymeric TCNQ films was found when the electrodes were transferred between solvents and electrochemically cycled between the neutral and reduced forms. The effective diffusion coefficient for charge transport (D /sub ct/) through the films decreases as the solvent size increases, but the product of the effective diffusion coefficient and viscosity was found to be approximately constant.
- Research Organization:
- Department of Chemistry, University of Tennessee, Knoxville, Tennessee
- OSTI ID:
- 5159381
- Journal Information:
- J. Electrochem. Soc.; (United States), Journal Name: J. Electrochem. Soc.; (United States) Vol. 132:6; ISSN JESOA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
400400* -- Electrochemistry
ALKALI METAL COMPOUNDS
CHARGE TRANSPORT
CHEMISTRY
DIFFUSION
ELECTROCHEMISTRY
ELECTRODES
ELECTROLYTES
FILMS
LITHIUM COMPOUNDS
ORGANIC COMPOUNDS
ORGANIC POLYMERS
ORGANIC SOLVENTS
POLYMERS
SALTS
SOLVENTS
SWELLING
VOLTAMETRY