The semiconductive properties of Vitamin A acid (Retinoic Acid), a long chain conjugated polyene, were studied as a function of the adsorption of different vapours. A compensation effect was observed in the electrical conduction process; unlike that in Vitamin A alcohol and Vitamin A acetate3) the compensation temperature was observed on the lower side of the experimental temperature (T 0≈285 K). It is concluded that the terminal =0 group conjugated to the polyene chain plays an important role in the manifestation of the compensation effect. Various conduction parameters have been evaluated.
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Mitra et al. (1987) studied this question.
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