Abstract
The magnitude of the photoinduced membrane potential across poly(vinyl chloride)/spirobenzopyran membranes doped with nonactin or valinomycin depended considerably upon the kind and the concentration of alkali-metal and NH4 cations in the aqueous solution adjacent to the ultraviolet (UV)-irradiated surface of the membrane. The photoresponse was suppressed with increasing concentration of the cations. The ion-selectivity in the potentiometric photoresponse of the nonactin-entrapped membrane was in the order of NH4 >K+ >Rb+ >Cs+ >Na+ >Li+, whereas the order of selectivity of Rb+ >K + >Cs+ >NH4 >Na+ >Li+ was observed for the valinomycin-doped membrane. The results can be explained in terms of the binding abilities of nonactin and valinomycin for alkali-metal and NH/ cations.
Original language | English |
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Pages (from-to) | 1307-1310 |
Number of pages | 4 |
Journal | Chemical and Pharmaceutical Bulletin |
Volume | 37 |
Issue number | 5 |
DOIs | |
Publication status | Published - 1989 |
Externally published | Yes |
Keywords
- ion-selectivity
- nonactin
- photoinduced membrane potential
- poly(vinyl chloride)/spirobenzopyran membrane
- valinomycin
ASJC Scopus subject areas
- Chemistry(all)
- Drug Discovery