期刊
SENSORS AND ACTUATORS B-CHEMICAL
卷 204, 期 -, 页码 807-810出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2014.08.041
关键词
Photoacid generator; Copper; Camphorquinone; PVC
资金
- Swiss National Science Foundation (SNF) [200021_134568]
- University of Geneva
- Austrian Science Fund (FVVF) [J3343]
- Austrian Science Fund (FWF) [J3343] Funding Source: Austrian Science Fund (FWF)
- Swiss National Science Foundation (SNF) [200021_134568] Funding Source: Swiss National Science Foundation (SNF)
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 ionexchanging 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. (C) 2014 Elsevier B.V. All rights reserved.
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