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In situ FTIR spectroelectrochemical characterization of n- and p-dopable phenyl-substituted polythiophenes

T. Yohannes ; S. Lattante ; H. Neugebauer ; N. S. Sariciftci ; Mats R. Andersson (Institutionen för kemi- och bioteknik, Polymerteknologi)
Physical Chemistry Chemical Physics (1463-9076). Vol. 11 (2009), 29, p. 6283-6288.
[Artikel, refereegranskad vetenskaplig]

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.

Nyckelord: spectroscopy, evidences, cells, bulk



Denna post skapades 2010-02-25.
CPL Pubid: 115045

 

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Institutioner (Chalmers)

Institutionen för kemi- och bioteknik, Polymerteknologi (2005-2014)

Ämnesområden

Molekylfysik
Fysikalisk kemi

Chalmers infrastruktur