Chemosensor Technologies for Metal Ion Detection
Summary
Chemosensor technologies harness molecular recognition and signal transduction to detect trace metal ions with high sensitivity and selectivity. These sensors employ tailored ligands or materials that, upon coordinating specific cations, undergo measurable optical changes—most commonly fluorescence modulation or colour variation. Advances in receptor design, incorporating functional motifs such as Schiff bases, hydrazones and macrocyclic scaffolds, have enabled rapid response times and sub-micromolar detection limits. Nanomaterial hybrids, quantum dots and supramolecular assemblies further extend the dynamic range, offering ratiometric and turn-on/off modalities. Such developments are vital for monitoring environmental contaminants, ensuring potable water quality, supporting biomedical diagnostics and guiding industrial processes. The field continues to evolve towards portable, cost-effective platforms and real-sample adaptability, emphasising reversible binding, multiplexed detection and integration with imaging tools to address global challenges in metal-ion monitoring.
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Chemosensor Technologies for Metal Ion Detection publication trend
The graph below shows the total number of articles in chemosensor technologies for metal ion detection across all publications each year (not limited to Nature Index journals).
Technical terms
Chemosensor: A molecular probe or material that generates a measurable optical signal upon binding a target metal ion.
Fluorescence turn-off sensor: A probe in which the emission intensity decreases on interaction with the analyte.
Colourimetric sensor: An optical detector that produces a visible colour change upon analyte binding.
Aggregation-induced emission (AIEE): A luminescence phenomenon where emission is enhanced when sensor molecules aggregate.
Ligand-to-metal charge transfer (LMCT): An electronic transition from a ligand orbital to a metal-centred orbital, often causing spectral shifts.
References
- A Simple Turn-off Schiff Base Fluorescent Sensor for Copper (II) Ion and Its Application in Water Analysis. Molecules (2021).
- Colorimetric Detection of Multiple Metal Ions Using Schiff Base 1-(2-Thiophenylimino)-4-(N-dimethyl)benzene. Chemosensors (2019).
- Synthesis of a novel hydrazone-based compound applied as a fluorescence turn-on chemosensor for iron( iii ) and a colorimetric sensor for copper( ii ) with antimicrobial, DFT and molecular docking studies. RSC Advances (2023).
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