Abstract
Sequential recognition of Zn2+ and Cu2+ by a new anthracene-containing dipyridylamine-based receptor 1 (N-((anthracen-9-yl)methyl)-N-(pyridin-2-yl)pyridin-2-amine) has been achieved. Receptor 1 exhibited highly selective and sensitive fluorescence “off–on” recognition property to Zn2+ with a 1:1 binding stoichiometry. The resulting 1-Zn2+ complex displayed high selectivity to Cu2+ through the decrease in fluorescence intensity, demonstrating that 1-Zn2+ could detect Cu2+ via metal displacement. The sequential recognition of Zn2+ and Cu2+ via metal exchange suggests that receptor 1 has a potential utility for Zn2+ and Cu2+ detection.
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