STUDIES BY VIBRATIONAL SPECTROSCOPY AND E LECTRONIC PARAMAGNETIC-RESONANCE OF P-DOPED POLY(P-PHENYLENE VINYLENE)

In this work, we present Resonance Spectroscopy studies of Poly(p-phen ylene vinylene) (PPV) to characterize the charged excitations induced during doping. The vibrational analysis has been performed in order to describe the electronic distribution modifications introduced along t he chain of the polymer at the transition from semi conducting to cond ucting state. A Valence Force Field model is used to determine the for ce constants relative to the electronic structure of PPV in conducting state. The Electron Paramagnetic Resonance (EPR) studies are also use d to confirm the polaronic character observed by Resonance Raman Scatt ering.