Infrared Spectra of Iodine Doped Polyazines
William B. Euler, Solid State Communications, 1988, 68, 291 – 293
Abstract
The mid-IR spectra of iodine doped polyazines is reported as a function of doping level. As the iodine content increases in this polymer, two new bands develop while the other peaks in the vibrational spectrum remain unchanged. A broad peak centered at 4000 cm–1 or above is assigned as an electronic transition to a low lying midgap state. This midgap state is probably associated with bipolaron formation. The second new band at 1505 cm–1 is narrow and is of vibrational origin. This band is assigned to a C=C or N=N double bond stretch. Correlation of the relative intensity of the 1505 cm–1 peak with the electrical conductivity as a fundtion of iodine content suggests that the vibration associated with this band originates from the charge carrier.