期刊
ANALYTICAL CHEMISTRY
卷 86, 期 13, 页码 6184-6187出版社
AMER CHEMICAL SOC
DOI: 10.1021/ac500956j
关键词
-
资金
- College of Sciences and the Department of Chemistry at the University of Central Florida
Presented here is a sensing membrane consisting of a modified merocyanine photoacid polymer and a calcium ionophore in plasticized poly(vinyl chloride). This membrane is shown to actively exchange protons with calcium ions when switched ON after illumination at 470 nm, and the exchange can be followed by UV-vis spectroscopy. The sensing membrane shows no response in the ON state when calcium ions are absent. The limit of detection of the sensor is 5.0 x 10(-4) M with an upper detection limit of 1.0 M. Thus, we demonstrate for the first time the use of a visible light activated, lipophilic photoacid polymer in an ion-sensing membrane for calcium ions, which highly discriminates potassium, sodium, and magnesium ions.
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