A new coumarin-based chemosensor for Fe3+ in water

A new coumarin derivative L was synthesized, and the binding property of the L towards metal ions was examined through the changes in fluorescence intensity. L exhibited high selectivity for Fe3+ in HEPES aqueous buffer (pH 7.2), and the selectivity was not affected by the presence of representative alkali metals, alkali earth metals and other transition-metal salts. The binding mode was investigated by UV spectra, ESI-MS and IR data.