Abstract
AbstractIon‐binding complexes between high molecular weight polyethylene oxide (PEO) and NaSCN, KSCN and NaI were studied by low and high temperature infrared (IR) spectroscopy (from −130°C to 200°C) within the interval from 2200 cm−1 to 700 cm−1.It is shown that absorption maxima of the stretching vibration of COC bonds in PEO are shifted towards lower wave‐numbers in the IR spectra of the complexes because of the decreasing electronic density of these bonds due to electrostatic interaction of the metal cation (Me+) with the ether O atom.Characteristic changes in the IR spectra of the complexes were observed in the absorption regions of the stretching vibration of COMe+ bonds. They can be explained by structural changes in the systems when they are heated and cooled. Possible conformation states of CC and CObonds in the ethylene oxide units in the complexes between PEO and alkali metal salts which are similar to the conformations of these bonds in molten PEO are suggested.
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