Abstract
We present an effective, symmetric, and reversible luminous fluorescent organic material based on cystamine. Cysal is a substance that can be produced in a single step by the reaction of salicylaldehyde with cystamine and is characterised by 1H &13C NMR, LCMS mass, and FT-IR spectroscopy. In a buffer solution of CH3CN/H2O (1:1 (v/v), HEPES = 50 mM), cysal displays a modest emissive characteristic. At a physiological pH of 7.4, the yellow-colored sensor Cysal demonstrated a robust emissive response with a high selectivity and sensitivity towards Pb2+ ions among other metal ions examined. The calculated binding constant and detection limit were 3.02 × 104 M−1 and 2.2 × 10−2 µM and 3.02 × 104 M−1, respectively. Real level samples from water, soil, and fairness cream were evaluated for the detection of Pb2+ ions, including the bioimaging method with Ecoli bacterial cells, to show the practical utility of the probe Cysal.
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