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.