B. Sankaran, J. Reynolds
May 5, 1997
Citations
2
Influential Citations
196
Citations
Quality indicators
Journal
Macromolecules
Abstract
The syntheses of two new derivatives of 3,4-ethylenedioxythiophene (EDOT), specifically 5-octyldioxeno[2,3-c]thiophene (EDOT-C8) (2) and 5-tetradecyldioxeno[2,3-c]thiophene (EDOT-C14) (3), and their polymers are reported in this paper. Cyclic voltammetry of 2 and 3 in 0.1 M TBAP/CH3CN show irreversible monomer oxidation peaks (Ep,m) at 0.89 and 0.93 V, respectively. Multiple scans yield electroactive and conducting polymer films on electrode surfaces. The PEDOT-C8 and PEDOT-C14 formed oxidize with relatively low peak potentials at −0.22 and −0.19 V, respectively, indicating the doped form of the polymer to be quite stable. Both PEDOT-C8 and PEDOT-C14 show two reduction processes with peaks at −0.18 and −0.16 V (Ec2,p) and −0.55 and −0.36 V (Ec1,p) respectively. Optoelectrochemical studies reveal an Eg of 1.75 eV for both polymers. The polymers are electrochromic, relatively transmissive and light gray in the oxidized form, while being opaque and deep purple in the reduced form exhibiting high electrochrom...