Abstract
The effects of adsorption (at 268 K) of ethanol vapor on the electrical conductivity of 1,1′-diacetylferrocene and 1,1′-ferrocenedicarboxylic acid in powder form have been studied by sandwich-type cell technique. A peak has been observed in the current vs. temperature plots in a specific temperature region. The effects of vapor pressure and heating rate on the temperature ( T max) at which the peak appears as well as the magnitude of the peak have been studied in detail. The experiment has indicated two activation energy values of these materials in the vapor-adsorbed state and these values are higher than the values for pure dry state. The unusual changes in the adsorption-induced electrical conductivity of these materials in a specific temperature range are possibly related to the adsorption-induced phase transition in these materials.
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