Search

Abstract: Based on fluorescent resonance energy transfer (FRET) between rhodamine and a naphthalimide fluorophore, a new ratiometric chemosensor L was synthesized and characterized. L exhibited high selectivity and excellent sensitivity in both absorbance and fluorescence detection of Hg2+ in aqueous solution with a broad pH span (1–10). The coordination of L with Hg2+ was chemically and partially reversible. The significant changes in the fluorescence color could be used for naked-eye detection. Furthermore, fluorescence imaging experiments of Hg2+ in living EC 109 cells demonstrated its value of practical applications in biological systems. [Copyright &y& Elsevier]

Abstract: A novel rhodamine-based fluorescent probe 1 was synthesized, which was designed as a fluoroionophore and chromophore for the optical detection of Fe3+ ions in water with a broad pH span (4–8). As expected, it exhibited high selectivity and sensitivity for Fe3+ over other commonly coexistent metal ions in water. The detection limit was measured to be 1.5μM. The significant changes in the fluorescence color could be used for naked-eye detection. Furthermore, fluorescence imaging experiments of Fe3+ ions in living MGC803 cells demonstrated its value of practical applications in biological systems. [Copyright &y& Elsevier]