Visible Light Activated Ion Sensing Using a Photoacid Polymer for Calcium Detection
Visible Light Activated Ion Sensing Using a Photoacid Polymer for Calcium Detection
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DOI：
10.1021/ac500956j
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发表时间：
2014-07-01
影响因子：
7.4
通讯作者：
Chumbimuni-Torres, Karin Y.
中科院分区：
文献类型：
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作者：
Johns, Valentine K.;Patel, Parth K.;Chumbimuni-Torres, Karin Y.
本文介绍了一种由改性的巯基光酸聚合物和增塑聚氯乙烯中的钙离子载体组成的传感膜。当在470 nm处照射后打开时，该膜显示出与钙离子主动交换质子，并且交换之后可以进行紫外-可见光谱。当钙离子不存在时，传感膜在ON状态下不显示响应。传感器的检测限为5.0 x 10（-4）M，检测上限为1.0 M。因此，我们证明了第一次使用的可见光激活，亲脂性光酸聚合物在离子传感膜的钙离子，高度歧视钾，钠，镁离子。
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.