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Title: 2,7-Diferrocenyl-3,6-diazaocta-2,6-diene: A highly selective dual fluorescent sensor for Zn<sup>2+ </sup>and Ag<sup>+ </sup>and electrochemical sensor for Zn<sup>2+</sup>
Authors: Dutta, Kaku
Das, Diganta Kumar
Keywords: Sensors
Electrochemical sensors
Fluorescent sensors
Cyclic voltammetry
Square wave voltammetry
Issue Date: Jun-2012
Publisher: NISCAIR-CSIR, India
Abstract: 2,7-Diferrocenyl-3,6-diazaocta-2,6-diene (DFDD), obtained by condensation reaction of acetylferrocene and ethylenediamine, exhibits Zn<sup>2+</sup> ion-induced enhancement of fluorescence intensity and Ag<sup>+</sup> ion-induced quenching of fluorescence intensity. The Zn<sup>2+</sup> ion shifts the redox potential of DFDD from +0.660 V ± 0.005 V to + 0.615 ± 0.005 V as observed by cyclic voltammetry and square wave voltammetry. Ca<sup>2+</sup>, Mg<sup>2+</sup>, Mn<sup>2+</sup>, Fe<sup>2+</sup>, Co<sup>2+</sup>, Ni<sup>2+</sup>, Cu<sup>2+</sup>, Cd<sup>2+</sup>, Pb<sup>2+</sup> and Hg<sup>2+</sup> have very little effect on fluorescence intensity of DFDD. These metal ions together with Ag<sup>+</sup> ion have no effect on the electrochemistry of DFDD. Both, fluorescence and UV-visible spectroscopic data show a 1:1 interaction between DFDD and Zn<sup>2+</sup> with binding constant 75 <i style="">M</i><i style=""><sup> </sup></i><sup>-1</sup>. The applicability of DFDD as fluorescence sensor for Zn<sup>2+</sup> ion has been shown in its estimation in commercial tablets.
Description: 816-820
ISSN: 0975-0975(Online); 0376-4710(Print)
Appears in Collections:IJC-A Vol.51A(06) [June 2012]

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