A 'turn-on' fluorescent sensor for the selective detection of cobalt and nickel ions in aqueous media

作者：Abebe Fasil A; Eribal Carla Sue; Ramakrishna Guda; Sinn Ekkehard^*

来源：Tetrahedron Letters, 2011, 52(43): 5554-5558.

DOI：10.1016/j.tetlet.2011.08.072

• Chemosensor
• Turn-on
• Metal-detector
• Cobalt
• Nickel
• Fluorescein
• Synthesis

Two newly designed turn-on fluorescein-based chemosensors are highly sensitive and selective for Co(2+) and Ni(2+) in both absorption and emission modes, normally difficult to achieve with these paramagnetic ions. Binding to both ions is reversible, as indicated by the bleaching of the color when the metal is extracted with EDTA. Given the difficulty of designing enhanced fluorescent sensors for paramagnetic Co(2+) and Ni(2+) ions, the fluorescein compounds may inspire the further development of more sophisticated sensing constructs for the detection of these ions.

• 出版日期2011-10-26