Spectroscopic studies of the growth and potential cycling of polybithiophene films

✍ Scribed by A. Robert Hillman; Marcus J. Swann

• Book ID: 103062046
• Publisher: Elsevier Science
• Year: 1988
• Tongue: English
• Weight: 878 KB
• Volume: 33
• Category: Article
• ISSN: 0013-4686
• DOI: 10.1016/0013-4686(88)80119-1

✦ Synopsis

Electropolymerization of bithiophene at potentials in the range 1.2-1.45 V has heen studied using time-resolved absorbance spectroscopy. At low potentials, the process is kinetically controlled at a rate exponentially dependent on potential. At high potentials diffusion control prevails. In the initial stages of growth there is evidence for low levels of an intermediate. Correlation of absorbance and charge transients implies uniform deposition and shows that bulk optical properties are established at an early stage. Voltammetric characterization in monomer-free solution shows a once-only effect on the first anodic scan: subsequent cycles exhibit reproducible coulometric and optical changes.