Selective “naked eye” detection of Al(iii) and PPi in aqueous media on a rhodamine–isatin hybrid moiety

A highly selective fluorescence probe, RIH (rhodamine–isatin hybrid) for Al3+ has been designed and synthesized. This new dual signal (colorimetric and fluorogenic “off–on” type) chemosensing ensemble based on the complex between RIH and Al3+ has also been effective to selectively discriminate PPi from other anions in aqueous solution at physiological pH.