Polymer conformation and ionic association in complexes of lithium, sodium and potassium triflate with poly (ethylene oxide) oligomers

1994 ◽  
Vol 72 ◽  
pp. 103-107 ◽  
Author(s):  
Roger Frech ◽  
Weiwei Huang
Keyword(s):  
Ethylene Oxide ◽  
Ionic Association ◽  
Polymer Conformation ◽  
Poly Ethylene Oxide ◽  
Poly Ethylene ◽  
Sodium And Potassium

A Comparative Study of Ionic Association in Poly(Ethylene Oxide)- MCF3SO3 Systems (M=Lithium and Sodium)

1998 ◽  
Vol 548 ◽  
Author(s):  
Roger Frech ◽  
Christopher P. Rhodes ◽  
Shawna S. York
Keyword(s):  
Ethylene Oxide ◽  
Vibrational Analysis ◽  
Ionic Association ◽  
Infrared Spectroscopic Study ◽  
Lithium Triflate ◽  
Compound Formation ◽  
Anionic Species ◽  
Energy Environment ◽  
Poly Ethylene Oxide ◽  
Poly Ethylene

ABSTRACTA comparative infrared spectroscopic study of the local vibrational potential energy environment of the CF3SO3 (triflate) anion in the poly(ethylene oxide)-lithium triflate and poly(ethylene oxide)-sodium triflate systems is presented. Analysis of the crystalline stoichiometric compounds in the two systems identifies significant differences in the ionic association. Comparison of the relative percentages of the anionic species in the PEO-NaTf system at various concentrations suggests that crystalline compound formation may proceed through intermediate structures. A symmetry-based vibrational analysis is applied to the crystalline compounds.

Compound Formation and Ionic Association in the Poly(ethylene oxide)−Potassium Triflate System

1997 ◽  
Vol 30 (24) ◽  
pp. 7472-7477 ◽  
Author(s):  
Sangamithra Chintapalli ◽  
Christine Quinton ◽  
Roger Frech ◽  
Colin A. Vincent
Keyword(s):  
Ethylene Oxide ◽  
Ionic Association ◽  
Compound Formation ◽  
Poly Ethylene Oxide ◽  
Poly Ethylene

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

1994 ◽  
Vol 369 ◽  
Author(s):  
R. Frech ◽  
W. Huang ◽  
M. A. K. L. Dissanayake
Keyword(s):  
Molecular Weight ◽  
Ethylene Oxide ◽  
High Molecular Weight ◽  
Deformation Mode ◽  
Ionic Association ◽  
Lithium Triflate ◽  
Poly Ethylene Oxide ◽  
Poly Ethylene ◽  
Solvent Molecules ◽  
High Molecular Weight Poly

AbstractIonic 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.

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