Abstract
A series of xanthene polymers has been
prepared as the first stage of a study of the potentialities of organic
semiconductors for the synthesis of model enzymes, and for the development of
ion-exchange adsorbents capable of direct electrical regeneration. The polymer
is composed of condensed xanthene residues cross-linked with phenyl bridges.
The polymers are p-type semiconductors and the best has a specific resistance
of 7 x 103 Ω cm which is less than that of crystalline organic
semiconductors by a factor of at least 104. The conductivity is not
due to the diradicals of the quinonoid resonance form of quinolphthalein, but
is more probably due to a resonating carbonium cation arising from partial
ionization of the xanthylium-lactone bond. The effect of polymerization
conditions on the resistance of the polymer has been studied.
Cited by
22 articles.
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