Please use this identifier to cite or link to this item: https://scholarbank.nus.edu.sg/handle/10635/91717
DC FieldValue
dc.titleStructural studies of halogen-substituted polyanilines by X-ray photoelectron spectroscopy
dc.contributor.authorKang, E.T.
dc.contributor.authorNeoh, K.G.
dc.contributor.authorTan, K.L.
dc.contributor.authorTan, B.T.G.
dc.date.accessioned2014-10-09T08:21:23Z
dc.date.available2014-10-09T08:21:23Z
dc.date.issued1990-04
dc.identifier.citationKang, E.T.,Neoh, K.G.,Tan, K.L.,Tan, B.T.G. (1990-04). Structural studies of halogen-substituted polyanilines by X-ray photoelectron spectroscopy. Synthetic Metals 35 (3) : 345-355. ScholarBank@NUS Repository.
dc.identifier.issn03796779
dc.identifier.urihttp://scholarbank.nus.edu.sg/handle/10635/91717
dc.description.abstractThe intrinsic oxidation states, the imine/amine ratios in particular, of the halogen monosubstituted polyanilines prepared by the oxidative chemical polymerization in HCl and H2SO4 media were determined quantitatively by X-ray photoelectron spectroscopy (XPS). Neither the type of halogen substituent (Cl, Br and I), nor the position of substitution, nor the protonic acid media caused a significant variation in the intrinsic oxidation states of the resulting polymers. The N 1s core-level spectra revealed an imine/amine ratio of 0.5:1 or less in all of the polymer bases. The position of substitution caused a wide variation in the polymer yield, with 2-substituted aniline giving the highest yield. Protonation by H2SO4 gave rise to monovalent sulfate anions and nitrogenonium cations. However, 'protonation' by HCl resulted only in covalently bonded chlorine, with most of the imine nitrogens remaining unprotonated. © 1990.
dc.sourceScopus
dc.subjectoxidation states
dc.subjectprotonation
dc.subjectsubstituted polyanilines
dc.subjectXPS
dc.typeArticle
dc.contributor.departmentCHEMICAL ENGINEERING
dc.contributor.departmentPHYSICS
dc.description.sourcetitleSynthetic Metals
dc.description.volume35
dc.description.issue3
dc.description.page345-355
dc.description.codenSYMED
dc.identifier.isiutNOT_IN_WOS
Appears in Collections:Staff Publications

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

Page view(s)

63
checked on Jun 14, 2019

Google ScholarTM

Check


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