Journal
NEW JOURNAL OF CHEMISTRY
Volume 46, Issue 17, Pages 7864-7871Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/d2nj00801g
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Funding
- JSPS KAKENHI Grant [JP20K05645]
- Yokohamakogyokai research foundation
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A chiral cation sensor consisting of two pyrene rings and a diethylene glycol linker has been developed to detect Al3+ and Cu2+ ions through differences in circular dichroism and fluorescence spectra. This sensor also revealed the formation of bipyrene structures triggered by Cu2+ cations, offering the potential for the development of dual-responsive fluorescent sensors capable of detecting two different analytes.
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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