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

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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.

Bibliographical metadata

Original languageEnglish
Pages (from-to)19377-19384
Number of pages7
JournalJournal of Physical Chemistry B
Volume109
Issue number41
DOIs
Publication statusPublished - 20 Oct 2005