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Title of Journal: Anal Bioanal Chem

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Abbravation: Analytical and Bioanalytical Chemistry

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Springer-Verlag

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10.1016/0030-4220(76)90181-X

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1618-2650

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Using the solvation parameter model to characteriz

Authors: Qichao Zhao Jens Eichhorn William R Pitner Jared L Anderson
Publish Date: 2009/07/24
Volume: 395, Issue: 1, Pages: 225-234
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Abstract

Ionic liquids ILs containing the trispentafluoroethyltrifluorophosphate anion FAP− have attracted increased attention due to their unique properties including ultrahigh hydrophobicity hydrolytic stability and wide electrochemical window In this study the solvation parameter model is used via gas chromatography to characterize the solvation interactions of seven ILs containing amino ester and hydroxyl functional groups appended to the cation and paired with FAP− as well as three ILs containing the bistrifluoromethylsulfonylimide anion NTf2− The role of the functional groups nature of the counter anion and cation type on the system constants were evaluated ILs containing FAP− possessed lower hydrogen bond basicity than NTf2based ILs having the same cationic component in the case of hydroxylfunctionalized cations the presence of FAP− led to an enhancement of the hydrogen bond acidity relative to the NTf2analogs The system constants support the argument that FAP− weakly coordinates the cation and any appended functional groups promoting properties of the cation which might be masked by stronger interactions with other anion systems The chromatographic performance of the IL stationary phases was evaluated by examining the retention behavior and separation selectivity for chosen analytes The results from this work can be used as a guide for choosing FAPbased ILs capable of exhibiting desired solvation properties while retaining important physical properties including high thermal stability and high hydrophobicityIn this study the solvation parameter model is used via gas chromatography to characterize the solvation interactions of seven ILs containing amino ester and hydroxyl functional groups appended to the cation and paired with trispentafluoroethyltrifluorophosphate FAP− as well as three ILs containing the bistrifluoromethylsulfonylimide anion NTf2−JLA acknowledges funding from the Analytical and Surface Chemistry Program in the Division of Chemistry and the Separation and Purification Processes Program in the Chemical Environmental Bioengineering and Transport Systems Division from the National Science Foundation for a CAREER grant CHE0748612

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