TY - JOUR
T1 - Electrodeposition and characterisation of copolymers based on pyrrole and 3,4-ethylenedioxythiophene in BMIM BF4 using a microcell configuration
AU - Astratine, Lavinia
AU - Magner, Edmond
AU - Cassidy, John
AU - Betts, Anthony
PY - 2014/1/1
Y1 - 2014/1/1
N2 - Electrochemical copolymerization of pyrrole (Py) and 3,4- ethylenedioxythiophene (EDOT) was performed in an ionic liquid 1-butyl-3-methylimidazolium tetrafluoroborate, (BMIM BF4) employing a 'micro-cell' in order to use the materials efficiently. Characterization of the copolymers formed on an ITO substrate was performed for different Py: EDOT ratios (1:2, 1:1, 2:1) in both aqueous and ionic liquid electrolytes. The three copolymers displayed different absorbance spectra with λmax of the polaron species at 507, 540 and 580 nm for PPy-co-PEDOT ratios of 1:2, 1:1, 2:1, respectively. Electrochemical and spectroelectrochemical analysis revealed that the properties of the copolymer depend upon the Py/EDOT monomer ratio used. The copolymer PPy-co-PEDOT (2:1) displayed good stability, a switching time of 20 s and a colouration efficiency of 101.3 C-1cm2. The presence of Py in the copolymer stabilised the polaron state of the copolymer and allowed greater ion mobility compared to the PEDOT alone.
AB - Electrochemical copolymerization of pyrrole (Py) and 3,4- ethylenedioxythiophene (EDOT) was performed in an ionic liquid 1-butyl-3-methylimidazolium tetrafluoroborate, (BMIM BF4) employing a 'micro-cell' in order to use the materials efficiently. Characterization of the copolymers formed on an ITO substrate was performed for different Py: EDOT ratios (1:2, 1:1, 2:1) in both aqueous and ionic liquid electrolytes. The three copolymers displayed different absorbance spectra with λmax of the polaron species at 507, 540 and 580 nm for PPy-co-PEDOT ratios of 1:2, 1:1, 2:1, respectively. Electrochemical and spectroelectrochemical analysis revealed that the properties of the copolymer depend upon the Py/EDOT monomer ratio used. The copolymer PPy-co-PEDOT (2:1) displayed good stability, a switching time of 20 s and a colouration efficiency of 101.3 C-1cm2. The presence of Py in the copolymer stabilised the polaron state of the copolymer and allowed greater ion mobility compared to the PEDOT alone.
KW - 1-butyl-3- methylimidazolium tetrafluoroborate
KW - 3;4- ethylenedioxythiophene
KW - Copolymer
KW - Microcell
KW - Polypyrrole
UR - http://www.scopus.com/inward/record.url?scp=84888365678&partnerID=8YFLogxK
U2 - 10.1016/j.electacta.2013.10.198
DO - 10.1016/j.electacta.2013.10.198
M3 - Article
AN - SCOPUS:84888365678
SN - 0013-4686
VL - 115
SP - 440
EP - 448
JO - Electrochimica Acta
JF - Electrochimica Acta
ER -