Please use this identifier to cite or link to this item: http://scholarbank.nus.edu.sg/handle/10635/67608
Title: X-ray photoelectron spectroscopy studies of deprotonated polypyrrole and its complexes
Authors: Kang, E.T. 
Neoh, K.G. 
Ong, Y.K.
Tan, K.L. 
Tan, B.T.G. 
Keywords: charge transfer
deprotonation
organic acceptors
polypyrrole
reprotonation
XPS
Issue Date: 1991
Source: Kang, E.T.,Neoh, K.G.,Ong, Y.K.,Tan, K.L.,Tan, B.T.G. (1991). X-ray photoelectron spectroscopy studies of deprotonated polypyrrole and its complexes. Polymer 32 (8) : 1354-1360. ScholarBank@NUS Repository.
Abstract: Oxidized polypyrrole (PPY) was subjected to deprotonation by 0.5 M NaOH. The interactions of the deprotonated pyrrolylium nitrogens with various protonic acids and organic electron acceptors were studied by X-ray photoelectron spectroscopy (XPS) and were found to be similar to those observed for the imine nitrogens in the emeraldine oxidation state of polyaniline. However, the cyclic acid/base treatments of the deprotonated PPY were not completely reversible. The interactions with the halobenzoquinones, such as o-chloranil, p-chloranil and o-bromanil, resulted in the formation of positively charged nitrogens and the halogen and benzoquinone anions. In the case of interaction with TCNE, cyano anions were involved while interaction with DDQ involved all three types of anions. The charge transfer (CT) behaviour of the deprotonated pyrrolylium nitrogens towards acid protonation, and 'doping' by the organic acceptors, together with the charge neutrality considerations, suggested the presence of localized units positive charge on the pyrrolylium nitrogens. © 1991.
Source Title: Polymer
URI: http://scholarbank.nus.edu.sg/handle/10635/67608
ISSN: 00323861
Appears in Collections:Staff Publications

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

Page view(s)

62
checked on Dec 8, 2017

Google ScholarTM

Check


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