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Abstract
A new rhodamine-labelled pyridyl thiourea-based compound 1 has been designed and synthesised. While the receptor selectively recognises F– and Al3+ ions in CH3CN, Al3+ and Ag+ ions are selectively screened from other cations in CH3CN/water (4/1, v/v; 10 μM Tris–HCl buffer, pH 6.8) by observing different emission characteristics and colour changes. While Ag+ is sensed through an increase in emission at 416 nm, Al3+ is detected by a ratiometric change in emission of 1 with a band at 585 nm. The receptor shows in vitro detection of both the ions in human cervical cancer (HeLa) cells.
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