RESUMO
A series of indole-based fluorescent chemosensors 1-4 were prepared and investigated characteristick features with transition metal ions. Sensors 1 and 2 were selective for Hg(2+) ion among a series of metal ions in H2O-DMSO with association constants of 4.60×10(4) and 5.90×10(4) M(-1) and detection limits of 140 and 101.6 µM, respectively.
Assuntos
Técnicas de Química Analítica/instrumentação , Corantes Fluorescentes/química , Indóis/química , Mercúrio/análise , Mercúrio/química , Espectrometria de FluorescênciaRESUMO
We synthesized a simple fluorescent receptor 3 bearing two boronic acid groups as recognition sites. The recognition behaviour of receptor 3 towards various anions was evaluated in THF/H(2)O (1:1, v/v) solution. Receptor 3 showed high selectivity for iodide among a series of anions. Fluorescence spectroscopy and computational calculations revealed that the electrostatic interaction played a crucial role in its high selectivity for iodide.
