Polyacenequinone radical polymers

Polymeric materials have also been produced which have relatively large conductivities and behave in some cases like semiconductors and even photoconductors [28]. For example, polyphenylacetylene, polyaminoquinones, and polyacenequinone radical polymers have been reported with resistivities from 10 to 10 ohm-cm. It has been suggested that the conductivity in these organic semiconductors is due to the existence of large number of unpaired electrons, which are free within a given molecule and contribute to the conduction current by hopping (tunneling) from one molecule to an adjacent one (see Electroactive Polymers in Chapter 5). 

Among the first poly conjugated polymers found to display an internal photoeffect were polyquinazones such as polyacenequinone radicals and aniline black21 ... 

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