Dual-channel recognition of Al3+ and Cu2+ ions using a chiral pyrene-based fluorescent sensor?
New Journal of Chemistry Pub Date: 2022-02-28 DOI: 10.1039/D2NJ00801G
Abstract
A chiral cation sensor comprising two pyrene rings and a diethylene glycol linker has been developed and utilized to detect Al3+ and Cu2+ ions based on differences in circular dichroism spectra. Remarkably, this sensor afforded the recognition of Al3+ and Cu2+ ions based on distinct differences in fluorescence spectra. The detection of Al3+ ions was achieved based on a typical excimer-to-monomer switching mechanism, whereas the oxidative dimerization of pyrenyl groups was proven to be the origin of the Cu2+-responsive switch in fluorescence spectrum. The Cu2+ cation-triggered formation of bipyrene structures, a process that has so far been overlooked in the development of pyrene-based sensors, holds promise for the generation of dual-responsive fluorescent sensors that afford the detection of two different analytes.
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Journal Name：New Journal of Chemistry
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CAS no.: 89640-58-4
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