Title

Visible Light Activated Ion Sensing Using a Photoacid Polymer for Calcium Detection

Authors

Authors

V. K. Johns; P. K. Patel; S. Hassett; P. Calvo-Marzal; Y. Qin;K. Y. Chumbimuni-Torres

Comments

Authors: contact us about adding a copy of your work at STARS@ucf.edu

Abbreviated Journal Title

Anal. Chem.

Keywords

STATE PROTON-TRANSFER; PHOTOCHROMIC SPIROPYRAN; POLY(VINYL CHLORIDE); SELECTIVE ELECTRODES; GENERATING SYSTEMS; OPTODES; SENSOR; MEMBRANES; DESIGN; PLASTICIZER; Chemistry, Analytical

Abstract

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.

Journal Title

Analytical Chemistry

Volume

86

Issue/Number

13

Publication Date

1-1-2014

Document Type

Article

Language

English

First Page

6184

Last Page

6187

WOS Identifier

WOS:000338488800004

ISSN

0003-2700

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