Fluorescence chemosensor for fluoride ion using quinoline-derived probe: Molecular logic gate application

Abstract

• Cadmium existing fluorescent probe used for the detection of fluoride ions. • The binding stoichiometric ratio of P-F − complex is 1:1 by 1 H NMR titration, Jobs plot, MS, and DFT. • The detection limit of probe for fluoride ions is 0.128 μM. • The probe was fruitfully applied to molecular logic gates and reala samples analysis. Here, we tested the existing cadmium probe ( P ) that could be used for the fluorescent detection of fluoride ions selectively over other anions. The strong emission was scrutinized at 500 nm for fluoride ions by P and concluded that it was caused by the hydrogen bonding interaction proceeded by deprotonation. As per Job’s graph, the binding stoichiometric ratio between P and fluoride ion is 1:1 which has been confirmed by 1 H NMR titration, MS, and density functional theory studies (DFT). The detection limit for fluoride ion is 0.128 μM based on the concentration-reliant fluorescence titration. According to the findings, the probe is a strong contender for fluoride ion recognition. Further, P was also beneficial in the molecular logic gate and real water samples.