Size selective and volume exclusion effects on ion transfer at the silicalite modified liquid-liquid interface

Michael J. Stephenson, Andrew J. King, Stuart M. Holmes, Robert A W Dryfe

    Research output: Contribution to journalArticlepeer-review

    Abstract

    The modification of the liquid/liquid interface with membranes of silicalite, a neutral framework zeolite, is used to extend the potential window. This feature allows the observation of the transfer of extremely hydrophilic ions, due to the size-exclusion of organic ions from the interior of the zeolitic framework. Similarly, volume exclusion effects are shown to affect facilitated ion transfer processes involving alkali metal cations. In contrast, proton transfer is largely unaffected by the presence of the zeolite, which is suggestive of more rapid diffusion processes within the interior of the framework. The technique of liquid/liquid electrochemistry should allow the measurement of solution phase transport parameters for ions within microporous hosts. © 2005 American Chemical Society.
    Original languageEnglish
    Pages (from-to)19377-19384
    Number of pages7
    JournalJournal of Physical Chemistry B
    Volume109
    Issue number41
    DOIs
    Publication statusPublished - 20 Oct 2005

    Keywords

    • Cation exchange
    • Liquid-liquid interface (size selective and vol. exclusion effects on ion transfer at silicalite modified liq.-liq. interface)
    • Silicalites Role: NUU (Other use, unclassified), PEP (Physical, engineering or chemical process), PYP (Physical process), PROC (Process), USES (Uses) (size selective and vol. exclusion effects on ion transfer at silicalite modified liq.-liq. interface)
    • Size effect
    • Volume (vol. effect
    • size selective and vol. exclusion effects on ion transfer at silicalite modified liq.-liq. interface)
    • size vol selective ion transfer silicalite liq liq interface

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