The 2,2′-bis(3,5-dichloro-2-hydroxybenzylideneamino)-1,1′-binaphthyl salen-type Schiff base ( BCHB ) has been synthesized and characterized. Exhibiting absorption and fluorescence changes in the presence of Cu 2+ and Zn 2+ in tetrahydrofuran (THF) solution, BCHB could be used as a colorimetric ‘naked eye’ and fluorescent chemosensor for the detection of Cu 2+ and Zn 2+ bi-functionally. Furthermore, this organic ligand can selectively recognize Cu 2+ and Zn 2+ in the presence of other metal ions (such as Na + , Ag + , Mn 2+ , Co 2+ , Ni 2+ , Fe 3+ , Cd 2+ , Hg 2+ , Pb 2+ , La 3+ , and Nd 3+ ), respectively. On the other hand, BCHB presents a tunable system integrated with one OR logic gate as well as one INHIBIT logic gate with Zn 2+ and Cu 2+ as chemical inputs by monitoring fluorescence and absorbance as output signals. Also, one IMPLICATION gate operating in fluorescence mode with Cu 2+ and EDTA as chemical inputs, based on their different binding capabilities, is present in this system.
Sensors and Actuators B: Chemical – Elsevier
Published: Mar 19, 2010
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