Evidence for Generation of Delocalized Polarons in Conducting Polyaniline: A Raman Scattering Spectroscopy Approach

Authors:
Publisher website
Google Scholar
Abstract
Photoexcitation as a novel route for obtaining delocalized polarons in conducting polyaniline is predicted theoretically and confirmed experimentally. Original model experiments and theoretical calculations on protonated emeraldine species with various chain alignments as well as of isolated chains were carried out. In addition, experimental models matching theoretical models of isolated and bulk polyaniline (PANI) chains were synthesized and their absorption and Raman spectra recorded. The detection of the photoexcited states was performed by conventional Raman scattering spectroscopy (generally employed for studying ground states), which is an attractive alternative for generating and characterizing photoexcited delocalized polarons in polyaniline. The occurrence of photoexcited delocalized polaronic species is favored by chain stacking.

This publication has 28 references indexed in Scilit: