Photoresponsive ion extraction/release systems: Dynamic ion optodes for calcium and sodium based on photochromic spiropyran

G Mistlberger; X J Xie; M Pawlak; G A Crespo; Eric Bakker

doi:10.1021/ac4000283

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Photoresponsive ion extraction/release systems: Dynamic ion optodes for calcium and sodium based on photochromic spiropyran

Journal article

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Photoresponsive ion extraction/release systems: Dynamic ion optodes for calcium and sodium based on photochromic spiropyran

G Mistlberger, X J Xie, M Pawlak, G A Crespo and Eric Bakker

Analytical Chemistry, Vol.85(5), pp.2983-2990

2013

DOI: https://doi.org/10.1021/ac4000283

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Abstract

Photoresponsive ion extraction/release systems (PRIONERS) represent a highly interesting tool for the localized and time-controlled chemical perturbation of biological materials. We report here on our first results on phototriggered calcium and sodium exchanging materials. Such materials exist in two distinct states ("on" and "off"), depending on the wavelength of illumination. We used a combination of spectroscopic and electrochemical methods to obtain a better understanding of the dynamic processes involved in the triggered ion-exchange reaction upon activation of the photoactive compound. The driving force for the ion exchange is the light-induced acidity change of the chromoionophore. Activation with UV light generates a species in the membrane with an increased pKa. Protons are pulled into the membrane, and at the same time, ions are expelled. The selectivity of the system is determined by the employed ionophore. In contrast to photoresponsive ionophore-based systems, the concept presented here is applicable for virtually any ion of interest for which an ionophore exists.

Details

Title: Photoresponsive ion extraction/release systems: Dynamic ion optodes for calcium and sodium based on photochromic spiropyran
Authors: G Mistlberger (Author) - University of Geneva, Switzerland
X J Xie (Author) - University of Geneva, Switzerland
M Pawlak (Author) - University of Geneva, Switzerland
G A Crespo (Author) - University of Geneva, Switzerland
Eric Bakker (Author) - University of Geneva, Switzerland
Publication details: Analytical Chemistry, Vol.85(5), pp.2983-2990
Publisher: American Chemical Society
Date published: 2013
DOI: 10.1021/ac4000283
ISSN: 0003-2700
Copyright note: Copyright © 2013 The Authors. This is an open access article published under an ACS AuthorChoice License, which permits copying and redistribution of the article or any adaptations for non-commercial purposes.
Organisation Unit: University of the Sunshine Coast, Queensland
Language: English
Record Identifier: 99450165702621
Output Type: Journal article

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