title: In situ FTIR spectroelectrochemical characterization of n- and p-dopable phenyl-substituted polythiophenes.
abstract: In situ attenuated total reflection Fourier transform infrared (ATR-FTIR) spectroelectrochemistry during oxidation (p-doping) and reduction (n-doping) of three phenyl-substituted polythiophenes, namely POPT, PEOPT and POMeOPT is presented. All the three phenyl substituted polythiophenes show both n- and p-doping. The infrared active vibration (IRAV) patterns obtained during electrochemical oxidation (p-doping) and reduction (n-doping) are compared. HOMO and LUMO energy levels are estimated from cyclic voltammetric experiments and from IRAV patterns during oxidation and reduction. A comparison shows that the standard graphical procedure to determine the onset of oxidation and reduction peaks in the cyclic voltammogram can be improved using in situ spectroscopy.
authors.affiliation: Chemistry Department, Addis Ababa University, Addis Ababa, Ethiopia. tekeyoha@chem.aau.edu.et
authors.forename: Teketel
authors.initials: T
authors.lastname: Yohannes
authors.forename: Sandro
authors.initials: S
authors.lastname: Lattante
authors.forename: Helmut
authors.initials: H
authors.lastname: Neugebauer
authors.forename: Niyazi Serdar
authors.initials: NS
authors.lastname: Sariciftci
authors.forename: Mats
authors.initials: M
authors.lastname: Andersson