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Stability Of Conducting Polythiophene And Derivatives
Published 1983 · Chemistry
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The doped PMeT (poly-3-methylthiophene) reveals that storage in air affects neither the CF3SO3(-) doping level nor the conductivity. These results are supported by the infrared analysis. This conducting polymer is characterized by a large broad band in the near infrared due to free carriers and by absorption patterns associated with the dopant CF3SO3(-). The undoped PMeT is found to behave in the same fashion. PT (polythiophene) and P(Me)2T show the same interesting stability characteristics, in contrast to the experimental precautions that must be taken with other types of organic conducting polymers. These materials have great thermal stability: 200-250 C in air and 700-800 C in an inert atmosphere or vacuum. They are stable in concentrated acidic media but are slowly attacked in basic solutions. Also investigated is the stability under electrochemical treatment.