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Light-Controlled Reversible Release and Uptake of Potassium Ions from Ion-Exchanging Nanospheres

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Published in ACS Applied Materials & Interfaces. 2014, vol. 6, no. 4, p. 2666-2670
Abstract Here, we report for the first time on photoswitchable nanospheres containing spiropyran (Sp) for reversible release and uptake of metal ions. K+ is used as a model ion to demonstrate the chemical principle of this approach. Valinomycin is incorporated in the nanospheres to stabilize K+. Upon UV illumination, Sp transforms to the more basic ring-opened merocyanine form, which takes up H+ from the surrounding aqueous solution and expels K+ from the nanospheres. The process can be reversed by irradiation with visible light to reduce the surrounding K+ concentration.
Keywords PhotoswitchingPotassium releaseNanosphereSpiropyranIon-selective
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Other version: http://pubs.acs.org/doi/abs/10.1021/am4049805
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XIE, Xiaojiang, BAKKER, Eric. Light-Controlled Reversible Release and Uptake of Potassium Ions from Ion-Exchanging Nanospheres. In: ACS Applied Materials & Interfaces, 2014, vol. 6, n° 4, p. 2666-2670. https://archive-ouverte.unige.ch/unige:37925

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Deposited on : 2014-06-18

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