Open AccessReversible Photodynamic Chloride-Selective Sensor Based on Photochromic Spiropyran
Author(s) -
Xiaojiang Xie,
Günter Mistlberger,
Eric Bakker
Publication year - 2012
Publication title -
journal of the american chemical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 7.115
H-Index - 612
eISSN - 1520-5126
pISSN - 0002-7863
DOI - 10.1021/ja307037z
Subject(s) - spiropyran , chemistry , photochromism , ionophore , optode , derivative (finance) , photochemistry , chloride , membrane , electrochemistry , electrode , organic chemistry , biochemistry , financial economics , economics
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.