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Fluorescence Chemosensor for HSO4 (-) Ion Based on Pyrrole-Substituted Salicylimine Zn (2+) Complex: Nanomolar
Umesh Fegade1, Jitendra Bhosale, Hemant Sharma
1School of Chemical Sciences, North Maharashtra University, Jalgaon, MS, 425001, India.
Abstract:
A novel pyrrole-substituted salicylimine zinc (II) ion complex has been synthesized and evaluated its anion binding affinity. The probe 4 has high selectivity for HSO4 (-) over other anions in CH3OH:H2O (70:30, v/v) solvent system. The emission intensity of 4 was quenched upon addition of HSO4 (-). The probe 4 is highly selective for HSO4 (-) with a detection limit of 40 nm. Photoinduced electron transfer (PET) is responsible for observed change. The binding affinity of 4 for HSO4 (-) was further authenticated through ratiometric change in absorbance profile.
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