Discriminative 'Turn-on' Detection of Al 3+ and Ga 3+ Ions as Well as Aspartic Acid by Two Fluorescent Chemosensors.

In this work, two Schiff-base-based chemosensors and containing electron-rich quinoline and anthracene rings were designed. is AIEE active in a MeOH-HO solvent system while formed aggregates as confirmed by the DLS measurements and fluorescence lifetime studies. The chemosensor was used for the sensitive, selective, and reversible 'turn-on' detection of Al and Ga ions as well as Aspartic Acid (Asp). Chemosensor , an isomer of , was able to selectively detect Ga ion even in the presence of Al ions and thus was able to discriminate between the two ions. The binding mode of chemosensors with analytes was substantiated through a combination of H NMR spectra, mass spectra, and DFT studies. The 'turn-on' nature of fluorescence sensing by the two chemosensors enabled the development of colorimetric detection, filter-paper-based test strips, and polystyrene film-based detection techniques.