Quantitative correlation of Raman spectral indicators in determining conformational order in alkyl chains

Christopher J. Orendorff, Michael W. Ducey, Jeanne E. Pemberton

Research output: Contribution to journalArticle

120 Scopus citations

Abstract

The correlation of Raman spectral indicators for the determination of alkyl chain interactions and conformational order is presented. These investigations probe the conformational order of bulk octadecane and low molecular weight polyethylene as they undergo solid/liquid phase transitions. Spectral indicators are quantitatively correlated to the I[va(CH2)]/I[vs(CH2)], as this is the primary indicator of rotational and conformational order obtained empirically from Raman spectra. These indicators are interpreted in terms of alkane intramolecular motion, intermolecular interactions between alkyl chains, crystal structure of these solid materials, and the presence of methylene conformers. Results demonstrate that Raman spectroscopy is sensitive to very subtle changes in alkane chain structure and conformation. These results can be used to understand molecular interactions and structure-function relationships in alkane-based materials.

Original languageEnglish (US)
Pages (from-to)6991-6998
Number of pages8
JournalJournal of Physical Chemistry A
Volume106
Issue number30
DOIs
StatePublished - Aug 1 2002

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry

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