Please use this identifier to cite or link to this item: http://scholarbank.nus.edu.sg/handle/10635/91763
Title: The intrinsic redox states and protonation behavior of poly(o-toluidine)
Authors: Kang, E.T. 
Neoh, K.G. 
Tan, K.L. 
Issue Date: May-1994
Source: Kang, E.T.,Neoh, K.G.,Tan, K.L. (1994-05). The intrinsic redox states and protonation behavior of poly(o-toluidine). Synthetic Metals 64 (1) : 77-81. ScholarBank@NUS Repository.
Abstract: The intrinsic redox states and protonation behavior of poly(o-toluidine) (POT) are compared with those of polyaniline and 2-chloroaniline polymer, using X-ray photoelectron spectroscopy (XPS) as a primary tool. The POT base can assume a 50% intrinsically oxidized state, or a 50% protonated state, as in the case of emeraldine (EM) base. The methyl-group substituent in POT, however, reduces halogen addition significantly during protonation by HCl of high concentrations. It also hinders the charge transfer interactions of the polymer with bulky organic acceptors, such as o-bromanil. No demethylation is observed during reprotonation or sulfonation of POT base, in contrast with a substantial degree of dehalogenation observed in the 2-chloroaniline polymer during similar treatment. Sulfonation of POT gives rise to a 50% self-protonated polymer, as in the case of sulfonated EM base, but is accompanied by further chain distortion. Further treatment of sulfonated POT with HClO4 can result in the co-existence of self-doping and external protonation of POT and a protonation level substantially above 50%. © 1994.
Source Title: Synthetic Metals
URI: http://scholarbank.nus.edu.sg/handle/10635/91763
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)

23
checked on Feb 18, 2018

Google ScholarTM

Check


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