Abstract:
Zinc oxide nanoparticle-coupled imine linkagebased
receptors (T4, T5 and T6) were studied for their
voltammetric characteristics. T4 and T5 having electron
withdrawing and electron donating substituents at meta
position of the imine linkage showed prominent cathodic
(reduction of imine group) peaks at -0.930 and -1.850 V,
respectively, while T6 (without any substituent) showed a
cathodic peak at -1.220 V. Voltammograms of the
receptors indicated that T4 and T5 responded quantitatively
for aluminium ions, while T6 responded for cobalt ions. All
the three receptors exhibited linear dynamic concentration
ranges between 0.1 and 0.42 lM with regression coeffi-
cients C0.98. Calibration curves for the determination of
aluminium and cobalt ions based on DPV data are reported
and supported with potentiometric studies. Energy minimization
studies using Gaussian 03W software also supported
stability of the complexes. The proposed analytical
method has been validated with complexometric method
for metal detection in real-time samples.
