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The Raman spectra of different ladder type poly( p ‐phenylenes) and ladder type oligo( p ‐phenylenes)
Author(s) -
Somitsch Dieter,
Wenzl Franz P.,
List Emil J. W.,
Wilhelm Peter,
Scherf Ulrich,
Leising Günther,
Knoll Peter
Publication year - 2002
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 - 10.1002/1521-3900(200205)181:1<383::aid-masy383>3.0.co;2-f
Subject(s) - raman spectroscopy , spectral line , type (biology) , vibrational spectrum , materials science , polymer chemistry , polymer , chemistry , physics , composite material , optics , ecology , astronomy , biology
We report on Raman spectra of ladder type oligo( p ‐phenylenes) of different chain lengths (5LOPP and 7LOPP) and make a comparison to the Raman spectrum of the corresponding polymer, ladder type poly( p ‐phenylene) (LPPP). For a better understanding of the vibrational behavior of LPPP, several LPPPs with different substituents (methyl, allyl, n ‐butyl, 1‐adamantyl) were investigated. The recorded Raman spectra of these LPPPs show significant changes in the interring CC stretching regions. An experimental analysis of the frequencies, intensities and line‐shapes of significant modes is given in dependence on the substituents and chain lengths.