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Vibrational Dynamics of Polyaniline Pernigraniline Base Form: A Conducting Polymer
Author(s) -
Mishra Abhishek Kumar,
Tandon Poonam,
Gupta V. D.
Publication year - 2008
Publication title -
macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 1022-1360
DOI - 10.1002/masy.200850512
Subject(s) - polyaniline , protonation , polymer , valence (chemistry) , chemical physics , dispersion (optics) , conductive polymer , gravitational singularity , materials science , base (topology) , physics , polymer chemistry , condensed matter physics , chemistry , quantum mechanics , composite material , polymerization , mathematics , ion , mathematical analysis
Summary: Polyaniline is unique among conducting polymers in that its electrical properties can be reversibly controlled both by the oxidation state of the main chain and by protonation. In the present communication we report normal modes and their dispersion in polyaniline pernigraniline base (PANI PNB) form using Urey ‐ Bradely force field which in addition to valence force field accounts for the non‐bonded interactions in the gem and cis configurations and tension terms. Some of the distinguished features of the dispersion curves such as cross‐over and Von Hove type of singularities are discussed and possible explanations are given in terms of symmetry considerations. Several new assignments, which are missing in earlier work, are reported.