- Gazi University Journal of Science
- Vol: 30 Issue: 4
- Theoretical study of the structure and tautomerism of an asymmetric diimine Schiff base, preparation...
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 Özdemir, Erdoğan Hasdemir
Pages : 124-138
View : 17 | Download : 5
Publication Date : 2017-12-11
Article Type : Research
Abstract :An asymmetric diimine Schiff base, 2-((E)-4-((E) -2-hydroxybenzylideneamino) benzylideneamino) phenol, was covered to a glassy carbon (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 (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