Abstract:
Zinc oxide (ZnO) nanoparticles were decorated with benzimidazole based organic ligand (L) to form
supramolecular hybrid for the recognition of Zn2+ in HEPES-buffered DMSO/H2O (7:3; v/v) solvent media
using absorption spectroscopy. The resultant hybrid compound (N) showed the shifting of imine linkage
bands ( CH¼N ) in IR spectra due to the chemical attachment of organic ligand (L) on ZnO surface. The
coating of organic ligand on the surface of ZnO was also confirmed with energy-dispersive x-ray (EDX)
analysis. The resultant hybrid compound (N) exhibited high selectivity towards Zn2+ ions over other
metal ions in HEPES-buffered DMSO/H2O (7:3; v/v) solution. The absorption peak intensity for Zn2+ ions
was observed at 560 nm (1 nM), which was quenched by the addition of mole concentration and the peak
shifted toward lower wavelength region at 442 nm (50 nM) resulted the development of hybrid
chemosensor with a detection limit of 4.09 nM.
