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Spectral studies on anthracene based dual sensor for Hg2+ and Al3+ ions with two distinct output modes of detection
1Department of Chemistry, Panjab University, Chandigarh 160014, India.
Abstract:
A simple and easily synthesized colorimetric and fluorescent chemosensor 1, based on aromatic OH and imine moieties as a binding and anthracene as signaling unit, has been synthesized in a one-step procedure. The chemosensor 1 is developed as a dual chemosensor for detection of Hg2+ and Al3+ ions in CH3OH, which exhibited a color change from light yellow to dark yellow with Hg2+ ions, enabling 1 a suitable "bare eye" indicator for Hg2+ ions. On the other hand, fluorescent enhancement with blue shift along with brilliant cyan fluorescence was observed upon binding with Al3+ ions. A possible sensing mechanism has been proposed by means of Job's plot and 1H NMR titration.
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