Study of pressure and temperature dependence of electrical properties in new intrinsic semiconducting polyacene quinone radical polymer

We have synthesized several new polyacene quinone radical co-polymers by condensation and experimentally found a kink at about 1.1 kbar on plots of log dc conductivity versus the square root of external pressure in a range from 0.1 to 10 kbar; a possibility of application of Mott´s T^1/4 law to the higher temperature region of 290-400K and analogue trends of change between dc conductivity and spin concentration, with mole fraction of 4, 4´ (hexafluoroisopropylidene diphthalic anhydride (HFDA)) introduced for improving the stability of properties. Plots of log dielectric constant versus the square root of pressure do not fully obey the linear relationship expected. A reasonable explanation of these experimental results is given