期刊
JOURNAL OF MATERIALS CHEMISTRY
卷 19, 期 34, 页码 6219-6224出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/b908755a
关键词
-
资金
- NSF of China [20675069, 20835005, J0630429]
We demonstrate for the first time a highly selective anion-responsive reversible gel-sol state transition in a supramolecular hydrogel of Ag(I)-glutathione (GSH) coordination polymers, which allows for facile and selective visual recognition of I- via naked eyes even in a strongly colored and/or fluorescent background. Such a strategy overcomes the drawback of spectral interferences which are often encountered in conventional colorimetric and fluorimetric means. It was rationalized that I- functioned as a depolymerizing agent for the Ag(I)-GSH supramolecular hydrogels. A feasible quantitative assay for I- was established that afforded satisfactory results for simulated wastewater samples. We believe that this strategy can in principle be applicable to other species by following a smart gel-sol state transition in designed supramolecular hydrogel.
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