Theoretical Study of The Structure and Tautomerism of An Asymmetric Diimine Schiff Base, Preparation and Characterization of Its Modified Electrode

UZUN D., AKTAN E., ÖZDEMİR Ö., HASDEMİR E.

GAZI UNIVERSITY JOURNAL OF SCIENCE, vol.30, no.4, pp.124-138, 2017 (ESCI) identifier

  • Publication Type: Article / Article
  • Volume: 30 Issue: 4
  • Publication Date: 2017
  • Journal Name: GAZI UNIVERSITY JOURNAL OF SCIENCE
  • Journal Indexes: Emerging Sources Citation Index (ESCI), Scopus
  • Page Numbers: pp.124-138
  • Gazi University Affiliated: Yes

Abstract

An asymmetric diimine Schiff base, 2-((4-((2-hydroxybenzylidene) amino) benzylidene) amino) phenol (2-HBP), was covered to a glassy carbon (GC) electrode surface in nonaqueous medium to fabricate a modified electrode. Cyclic 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 (2-HBP-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 asymmetric diimine Schiff base. The phenol-imine and ketoamine tautomerism forms of the asymmetric diimine Schiff base were investigated by using DFT calculations.