Poly(dibenzylidene)tetrathiapentalene : in situ ESR and conductivity measurements

The results of spectroelectrochemical ESR studies as well as of in situ con ductivity measurements performed on poly[(2,5-dibenzylidene)-1,3,4,6-tetrat hiapentalene] (polyDBTTP 1) are presented. The polymer comprises polaron/bi polaron systems corresponding to the presence of three redox systems. The r elative electrical resistivity strongly depends on the applied potential an d correlates well with the spin density. A partially oxidized state 2 beari ng one positive charge per monomer unit accounts for the conducting propert ies of the material.