Please use this identifier to cite or link to this item: http://scholarbank.nus.edu.sg/handle/10635/91638
Title: Polyaniline treated with organic acids: doping characteristics and stability
Authors: Neoh, K.G. 
Pun, M.Y.
Kang, E.T. 
Tan, K.L. 
Keywords: Doping
Polyaniline
Stability
Issue Date: 15-Aug-1995
Source: Neoh, K.G.,Pun, M.Y.,Kang, E.T.,Tan, K.L. (1995-08-15). Polyaniline treated with organic acids: doping characteristics and stability. Synthetic Metals 73 (3) : 209-215. ScholarBank@NUS Repository.
Abstract: Polyaniline base in the form of solution, powder and film was treated with aqueous solutions of three organic acids, toluenesulfonic acid (TSA), sulfosalicylic acid (SSA) and dodecylbenzenesulfonic acid (DBSA), and HClO4. The doping characteristics and stability of these salts were studied using X-ray photoelectron spectroscopy (XPS), Fourier transform infrared (FT-IR) spectroscopy and UV-Vis absorption spectroscopy. Polyaniline salts in N-methylpyrrolidinone (NMP) solution readily undergo deprotonation, whereas the DBSA-protonated salt in CHCl3 is stable even under near-UV irradiation. The protonation levels achievable when the base powder is treated with the organic acids are comparable with that obtained with HClO4. When the protonation of the base powder is carried out in mixtures of organic acids and HClO4, the organic acid anions are selectively incorporated into the salt. However, in the case of films, protonation by the organic acids is hampered by the large size of the anions. When salt films are cast from salt solutions, the larger anions are retained better than the ClO4 - anions when these films are treated with water. The organic anions also decompose at a higher temperature than the ClO4 - anions. © 1995.
Source Title: Synthetic Metals
URI: http://scholarbank.nus.edu.sg/handle/10635/91638
ISSN: 03796779
Appears in Collections:Staff Publications

Show full item record
Files in This Item:
There are no files associated with this item.

Page view(s)

35
checked on Feb 17, 2018

Google ScholarTM

Check


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.