IR spectra and hydration of short-chain polyethyleneglycols

M. Rozenberg*, A. Loewenschuss, Y. Marcus

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

78 Scopus citations

Abstract

IR spectra of pure polyethyleneglycol PEG-200, PEG-400, monomethylether of PEG-350, dimethyl ether of PEG-250, several related compounds and water solutions in PEG-200 were recorded in the range of the skeletal band at 1100 cm-1. The observed structured band in pure liquid PEGs and solutions was deconvoluted into five components shown to be due to non-interacting vibrations. The component near 1068 cm-1 is mainly due to the (C-OH) group and the 1104 and 1127 cm-1 components to the (C-O-C) groups. Of these the former is free or in the trans conformation and the latter is involved in an intramolecular H-bond or gauche conformation relative to the C-C bond. The changes band component parameters in PEG-200, on addition of small amounts of water, are ascribed to the attachment of the first water molecules to the terminal OH-group hydrogen bond system of the PEG molecule.

Original languageEnglish
Pages (from-to)1819-1826
Number of pages8
JournalSpectrochimica Acta - Part A: Molecular and Biomolecular Spectroscopy
Volume54
Issue number12
DOIs
StatePublished - Oct 1998

Keywords

  • Hydrogen bonds
  • IR spectra
  • Polyethyleneglycol
  • Water

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