Electrochemistry
Online ISSN : 2186-2451
Print ISSN : 1344-3542
ISSN-L : 1344-3542
Communications
Conductivity Enhancement in Poly (N-methylaniline) Obtained from Several Polymerizing Solutions Containing Different Organic Solvents
Jun YANOTomomi MUKAISumio YAMASAKIAkira KITANI
Author information
JOURNAL FREE ACCESS

2005 Volume 73 Issue 4 Pages 269-271

Details
Abstract

N-Methylaniline was electropolymerized at a constant anodic potential in several aqueous acid solutions containing different anions: ClO4-, Cl- NO3- and SO42-. After the initial stage of the electropolymerization, the anodic current linearly increased for the Cl-, NO3- and SO42- solutions, while it decreased for the ClO4- solution. The linear increasing current in the i-t curves implied ID nucleation growth of poly (N-methylaniline) (PNMA) on the electrode surface. The polymerization rate estimated from the slope values of the i-t curves was in the order of SO42- > NO3- > Cl-. The conductivity of the obtained PNMAs was the same order and the highest conductivity of 2.2 × 10-3 S cm-1 was seen for the SO42- doped PNMA. The order was explained by the Hofmeister series of the anions which represents the lyophilicity. To reduce the relative lyophilicity, organic solvents such as dimethylsulfoxide were added to the SO42- polymerizing solution and the electropolymerization was performed. The conductivity of the obtained PNMAs was further enhanced. The most conductive PNMA was obtained when dimethylsulfoxide was added (σ = 1.0 × 10-2 S cm-1).

Content from these authors
© 2005 The Electrochemical Society of Japan
Previous article Next article
feedback
Top