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Reversible Photodynamic Chloride-Selective Sensor Based on Photochromic Spiropyran
Journal article   Open access   Peer reviewed

Reversible Photodynamic Chloride-Selective Sensor Based on Photochromic Spiropyran

X J Xie, G Mistlberger and Eric Bakker
Journal of the American Chemical Society, Vol.134(41), pp.16929-16932
2012
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https://doi.org/10.1021/ja307037zView
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Abstract

membrane electrodes ionophore optodes
We report here for the first time on a reversible photodynamic bulk optode sensor based on the photoswitching of a spiropyran derivative (Sp). The photoswitching of Sp induces a large basicity increase in the polymeric phase, which triggers the extraction of Cl- and H+. Cl- is stabilized by a lipophilic chloride-selective ionophore inside the membrane, while H+ binds with the open form of Sp and induces a spectral change, hence providing the sensor signal. The system was studied with spectroscopic and electrochemical methods.

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Chemistry, Multidisciplinary
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