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Theoretical and experimental vibrational study of polyaniline in base forms: non‐planar analysis. Part I
Author(s) -
Cochet M.,
Louarn G.,
Quillard S.,
Boyer M. I.,
Buisson J. P.,
Lefrant S.
Publication year - 2000
Publication title -
journal of raman spectroscopy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.748
H-Index - 110
eISSN - 1097-4555
pISSN - 0377-0486
DOI - 10.1002/1097-4555(200011)31:11<1029::aid-jrs640>3.0.co;2-a
Subject(s) - tetramer , chemistry , dimer , polyaniline , oligomer , planar , crystallography , random hexamer , pentamer , raman spectroscopy , polymerization , polymer , polymer chemistry , organic chemistry , optics , physics , computer graphics (images) , computer science , biochemistry , enzyme
Experimental and theoretical studies of basic forms of polyaniline are presented. Experimental spectra of emeraldine, leucoemeraldine and pernigraniline and their oligomer model compounds (diphenylamine, phenyl‐end‐capped dimer, phenyl‐end‐capped tetramer, phenyl‐end‐capped hexamer, imine form of phenyl‐end‐capped dimer, pernigraniline base phenyl‐end‐capped tetramer and emeraldine base phenyl‐end‐capped tetramer) were recorded in N ‐methyl‐2‐pyrrolidone solution and in the solid state. The calculations were performed using the valence force field model. A non‐planar geometry of the polymers studied was taken into consideration and particular phenylene ring torsions rendering the system non‐planar were analyzed. The assignments of the observed modes was made possible by comparison of the calculated and experimentally measured wavenumbers. Copyright © 2000 John Wiley & Sons, Ltd.