K.K. Upadhyay et al. / Journal of Molecular Structure 963 (2010) 228–233
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performed. The cyclic voltammogram (Fig. 7) of the receptor pro-
duced anodic and cathodic peaks at ꢁ1.60 and ꢁ1.51 V, respectively,
with a pre-adsorption wave at ꢁ1.06 V in the anodic region possibly
due to adsorption of the receptor on the electrode surface. On the
addition of 1.5 equivalent of acetate as its sodium salt, anodic and
the cathodic wave shifted to ꢁ1.31 and ꢁ1.16 V, respectively. Be-
sides the shifting of anodic and cathodic waves, the pre-adsorption
wave was also shifted to ꢁ0.98 V as compared to ꢁ1.06 V in the free
receptor. The shifting of anodic and cathodic waves towards less ꢁve
potential on the addition of acetate to the receptor solution indi-
cated a binding between receptor and acetate confirming our obser-
vation from UV–vis, 1H NMR and DFT studies. At the same time it
may also be concluded that after the binding of receptor with acetate
it becomes more prone towards its adsorption at the electrode sur-
face in the light of shifting of pre-adsorption wave towards less ꢁve
potential. Hence the receptor (1) possesses potential ability to be
used as an electrochemical sensor also.
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Thus, we present a coumarin based hydrazone (receptor 1) hav-
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architecture in its solid state with its ability to act as ICT probe for
the naked-eye detection of a few biologically relevant anions in di-
methyl sulphoxide.
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KKU gratefully acknowledges the financial help from UGC [F.
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port from CSIR, New Delhi. Authorsarethankfultothecoordinator
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Appendix A. Supplementary data
Supplementary data associated with this article can be found, in
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