Article ID Journal Published Year Pages File Type
5399384 Journal of Luminescence 2015 29 Pages PDF
Abstract
A simple salicylaldehyde derived Schiff base N, N′- bis (p-chloro salicylidene)-1, 2- ethylenediamine (L) was synthesized and characterized. The receptor demonstrates simultaneous dual channel chromogenic and fluorogenic signaling towards HSO3− and Zn2+ in mixed aqueous media. Solvatochromism was employed systematically for modulating its optoelectronic properties. The probe was successfully assessed to monitor HSO3− detection via UV-vis spectroscopy. DFT calculations and 1H NMR spectroscopy further support the results based on shifting of equilibrium. Moreover, the sensor showed large fluorescence enhancement with blue-shift of 48 nm after addition of Zn2+. The probe exhibits high selectivity over other competitive ions with high detection limit of 6.54×10−5 M and 3.21×10−6 M for HSO3− and Zn2+, respectively. Importantly, this is one of the rare reports in which Schiff base was utilized for the fabrication of chromogenic or fluorogenic sensor using solvent effect for multianalyte detection.
Related Topics
Physical Sciences and Engineering Chemistry Physical and Theoretical Chemistry
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