1. A reversible fluorescence 'off-on-off' sensor for sequential detection of aluminum and acetate/fluoride ions
- Author
-
Naveen Mergu, Lokesh Kumar Kumawat, Alok Singh, and Vinod Kumar Gupta
- Subjects
Models, Molecular ,Paper ,Metal ions in aqueous solution ,Inorganic chemistry ,Molecular Conformation ,Acetates ,Photochemistry ,Binding, Competitive ,Dissociation (chemistry) ,Chemistry Techniques, Analytical ,Analytical Chemistry ,Metal ,Rhodamine ,chemistry.chemical_compound ,Fluorides ,Colorimetry ,Schiff Bases ,Fluorescent Dyes ,Schiff base ,Chemistry ,Rhodamines ,Temperature ,Hydrogen-Ion Concentration ,Fluorescence ,Spectrometry, Fluorescence ,visual_art ,visual_art.visual_art_medium ,Fluoride ,Aluminum - Abstract
A new rhodamine functionalized fluorogenic Schiff base CS was synthesized and its colorimetric and fluorescence responses toward various metal ions were explored. The sensor exhibited highly selective and sensitive colorimetric and "off-on" fluorescence response towards Al(3+) in the presence of other competing metal ions. These spectral changes are large enough in the visible region of the spectrum and thus enable naked-eye detection. Studies proved that the formation of CS-Al(3+) complex is fully reversible and can sense to AcO(-)/F(-) via dissociation. The results revealed that the sensor provides fluorescence "off-on-off" strategy for the sequential detection of Al(3+) and AcO(-)/F(-).
- Published
- 2015