Theoretical study of the structure and tautomerism of an asymmetric diimine Schiff base, preparation and characterization of its modified electrode

Authors : Demet UZUN, Ebru AKTAN, Özlem GÜNGÖR ÖZDEMİR, Erdoğan HASDEMİR

Pages : 124-138

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Publication Date : 2017-12-11

Article Type : Research Paper

Abstract :An asymmetric diimine Schiff base, 2-insert ignore into journalissuearticles values(insert ignore into journalissuearticles values(E);-4-insert ignore into journalissuearticles values(insert ignore into journalissuearticles values(E); -2-hydroxybenzylideneamino); benzylideneamino); phenol, was covered to a glassy carbon insert ignore into journalissuearticles values(GC); electrode surface in nonaqueous medium to fabricate a modified electrode. C yclic voltammetry was applied for the surface modification experiments in 1 mM diimine solution. Cyclic voltammetry , contact angle measurement, electrochemical impedance spectroscopy and X-ray photoelectron spectroscopy techniques were employed to characterize the modified GC insert ignore into journalissuearticles values(diimine-GC); surface. Electrochemical impedance results showed that the modified surface blocked the electron transfer with a 98.9% surface coverage value. Additionally, theoretical study was performed to gain insight into the structural and tautomeric aspects of the diimine Schiff base. The phenol-imine and keto-amine tautomerism forms of the diimine Schiff base were investigated by using DFT calculations.
Keywords : Modification, Electrochemical Impedance Spectroscopy, Contact Angle, Tautomerism, DFT