Invited feature articleImidazoloquinoline bearing thiol probe as fluorescent electrochemical sensing of Ag and relay recognition of Proline

- Imidazole conjugated quinolone bearing a thiol group (IQT) senses Ag+ sensor via turn on-off mechanism without any influence of other metal ions.
- In situ IQT-Ag+ complex is utilized as a reversible sensor for Proline by a fluorescence enhancement mechanism as relay recognition process.
- The practical applications for sensor IQT is also demonstrated via electrochemical desalination techniques.
- A colorimetric kit has been developed and bioimaging studies was carried out by utilizing IQT for the detection of Ag+.

A new highly selective fluorescent chemosensor for Ag+ was developed based on an imidazole conjugated quinolone bearing a thiol group (IQT). The Chemosensor serves as fluorescence quencher for Ag+ in solution in the presence of other competing metal ions. Further, the in situ formed IQT-Ag+ complex is utilized as a reversible sensor for the amino acid, Proline with high selectivity over other amino acids by a fluorescence enhancement mechanism as relay recognition process. The practical applications for sensor IQT is also demonstrated by the complete removal of Ag+ ions from the environmental water samples via electrochemical desalination techniques and its bioimaging in cellular micro-organisms.

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