Abstract
A rhodamine-based fluorescent probe, integrated with phosphonate group, demonstrated highly selective and sensitive recognition towards copper (II) ions over other metal species. Operating via ring opening reaction, the probe molecule (RhP) offered extensive properties such as “turn-on” fluorescence response, naked-eye detection, low detection limit (15 nM) and fast response time (<15 s). Detection of copper (II) ions in living cells as a biological application is also successfully reported.
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