131I diffusion in charge-transfer complexes

The diffusion coefficients of the active species (I2) was evaluated in 2I2pyrene, 2I2violanthrene and in 3I22phenotiazin which are employed at present as charge-transfer complexes in solid-state cells. The measurements were performed by the Gruzin-Seibel method in a range of temperatures between 0.5 and 600C. In all three cases a strong contribution of short-path diffusion was observed. The autoradiographs enabled them to follow the process and to compare their results with those of the Gruzin method and with the structural aspect observed by scanning electron microscopy (SEM). (Auth.)