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Visible light induced photoacid generation within plasticized PVC membranes for copper (II) ion extraction

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Published in Sensors and Actuators. B, Chemical. 2014, vol. 204, p. 807-810
Abstract We present here an approach for light induced generation of lipophilic cation-exchangers in plasticized PVC membranes. Using camphorquinone as photosensitizer, a lipophilic cationic photoacid generator can produce protons under visible light illumination and endow the polymeric membrane with ion-exchanging property. After light illumination, the membrane containing a Cu2+ ionophore, is able to extract Cu2+ ions from the contacting aqueous solution. The acid generation upon light irradiation is relatively fast (ca. 100 s). The Cu2+ extraction process was imaged with fluorescence microscopy using Calcein, a fluorescence indicator whose fluorescence is quenched by Cu2+. Such a technique may form a new platform for light triggered ion concentration perturbation.
Keywords Photoacid generatorCopperCamphorquinonePVC
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XIE, Xiaojiang, MISTLBERGER, Günter, BAKKER, Eric. Visible light induced photoacid generation within plasticized PVC membranes for copper (II) ion extraction. In: Sensors and Actuators. B, Chemical, 2014, vol. 204, p. 807-810. doi: 10.1016/j.snb.2014.08.041 https://archive-ouverte.unige.ch/unige:144150

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Deposited on : 2020-11-04

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