Journal
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
Volume 132, Issue 37, Pages 12838-12840Publisher
AMER CHEMICAL SOC
DOI: 10.1021/ja105793c
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Funding
- Chemical Sciences, Geosciences and Biosciences Division, Office of Basic Energy Sciences, Office of Science, U.S. Department of Energy
- Camille Dreyfus Teacher-Scholar Award
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Here we demonstrate a bioinspired system where light stimulus is used to trigger the wavelength-dependent release and then reuptake of chloride ions in nonaqueous solutions. A chiral aryl-triazole foldamer with two azobenzene end groups has been synthesized to define a folded binding pocket for chloride ions that unfolds with UV light to liberate the chloride. The trans-dominated helical foldamer becomes less stable upon photoisomerization to the cis forms. Simultaneously, the observed binding affinity shows an similar to 10-fold reduction from K = 3000 M-1 (MeCN, 298 K). Control of chloride levels using light is demonstrated by switching the conductivity of an electrolyte solution up and down.
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