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|Title:||2,7-Diferrocenyl-3,6-diazaocta-2,6-diene: A highly selective dual fluorescent sensor for Zn2+ and Ag+ and electrochemical sensor for Zn2+|
Das, Diganta Kumar
|Keywords:||Sensors;Electrochemical sensors;Fluorescent sensors;Fluorescence;Cyclic voltammetry;Square wave voltammetry;Zinc;Silver|
|Abstract:||2,7-Diferrocenyl-3,6-diazaocta-2,6-diene (DFDD), obtained by condensation reaction of acetylferrocene and ethylenediamine, exhibits Zn2+ ion-induced enhancement of fluorescence intensity and Ag+ ion-induced quenching of fluorescence intensity. The Zn2+ 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. Ca2+, Mg2+, Mn2+, Fe2+, Co2+, Ni2+, Cu2+, Cd2+, Pb2+ and Hg2+ have very little effect on fluorescence intensity of DFDD. These metal ions together with Ag+ ion have no effect on the electrochemistry of DFDD. Both, fluorescence and UV-visible spectroscopic data show a 1:1 interaction between DFDD and Zn2+ with binding constant 75 M -1. The applicability of DFDD as fluorescence sensor for Zn2+ ion has been shown in its estimation in commercial tablets.|
|Appears in Collections:||IJC-A Vol.51A(06) [June 2012]|
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