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Properties of poly(tetrabromo‐ p ‐phenylenediselenide) doped with IBr, H 2 SO 3 , and CH 3 COOH acids
Author(s) -
Godoy A.,
Tregouet Y.,
Abe S. Yapi,
Molinie P.,
Diaz F. R.,
Bernède J. C.
Publication year - 2000
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/1097-4628(20001227)78:14<2511::aid-app110>3.0.co;2-4
Subject(s) - x ray photoelectron spectroscopy , electron paramagnetic resonance , doping , steric effects , conductivity , chemistry , substituent , saturation (graph theory) , polymer , crystallography , polymer chemistry , materials science , stereochemistry , nuclear magnetic resonance , organic chemistry , physics , mathematics , optoelectronics , combinatorics
Poly(tetrabromo‐ p ‐phenylenediselenide) (PBrPDSe) has been doped by IBr, H 2 SO 3, and CH 3 COOH acids. The samples have been studied by X‐ray photoelectron spectroscopy (XPS) and electron spin resonance (ESR). Conductivity measurements have also been performed on pressed pellet samples. It has been shown by XPS and ESR that, after doping, positive charges are localized on Se atoms. The conductivity of the acid‐doped PBrPDSe exhibits an increase by about four orders of magnitude. However, the limit of 10 −7 Ω −1 cm −1 appears difficult to overcome. This saturation effect could be attributed not only to charge localization on Se atoms but also to steric hindrance related to the substituent introduced on the backbone of the polymer. © 2000 John Wiley & Sons, Inc. J Appl Polym Sci 78: 2511–2517, 2000