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Ionic Association of Lithium Triflate in Glymes, Model Solvents, and High Molecular Weight Poly(Ethylene Oxide)

Published online by Cambridge University Press:  16 February 2011

R. Frech ,
W. Huang  and
M. A. K. L. Dissanayake
R. Frech
Affiliation:
University of Oklahoma, Department of Chemistry, 620 Parrington Oval, Norman, OK 73019
W. Huang
Affiliation:
University of Oklahoma, Department of Chemistry, 620 Parrington Oval, Norman, OK 73019
M. A. K. L. Dissanayake
Affiliation:
University of Perideniya, Department of Physics, Sri Lanka
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Abstract

Ionic association in lithium trifluoromethanesulfonate (triflate) dissolved in glymes, glycols, model solvents, and high molecular weight poly(ethylene oxide) is studied by analysis of vibrational band structure. Surprisingly, the CF3 symmetric deformation mode is shown to be the most accurate measure of ionic association and the reasons for this are discussed. The nature of various associated lithium triflate species as deduced from ab initio calculations is supported by spectral data presented here. A weak interaction of the triflate anion with certain solvent molecules containing an alcohol OH group is observed. Finally the temperature dependence of ionic association in a complex of lithium triflate and high molecular weight poly(ethylene oxide) is described.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 369: Symposium U – Solid State Ionics IV , 1994 , 523
Copyright
Copyright © Materials Research Society 1995

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