1,2,4-Triazole-substituted metallophthalocyanines carrying redox active cobalt(II), manganese(III), titanium(IV) center and their electrochemical studies


Cakir D., BEKİRCAN O., BIYIKLIOĞLU Z.

SYNTHETIC METALS, vol.201, pp.18-24, 2015 (Peer-Reviewed Journal) identifier identifier

  • Publication Type: Article / Article
  • Volume: 201
  • Publication Date: 2015
  • Doi Number: 10.1016/j.synthmet.2015.01.006
  • Journal Name: SYNTHETIC METALS
  • Journal Indexes: Science Citation Index Expanded, Scopus
  • Page Numbers: pp.18-24
  • Keywords: Phthalocyanine, Synthesis, Manganese, 1,2,4-Triazole, Electrochemistry, Cyclic voltammetry, SITU SPECTROELECTROCHEMICAL CHARACTERIZATION, METAL-FREE, PHTHALOCYANINES SYNTHESIS, SPECTROSCOPIC CHARACTERIZATION, ELECTROCATALYTIC ACTIVITY, SUBSTITUTED MANGANESE, AGGREGATION, COMPLEXES, BEHAVIOR, CO(II)

Abstract

The synthesis and characterization of novel peripherally-tetra 4-(2-{[4-(4-fluorophenyl)-5-(4-methoxyphenyl)-4H-1,2,4-triazol-3-yl]thio}ethoxy) substituted (TiOPc)-O-IV, (MnClPc)-Cl-III, (CoPc)-Pc-II 6-8 are described for the first time in this study. All the new compounds are characterized by a combination of IR, H-1 and C-13 NMR, mass, elemental analysis and UV-vis spectroscopy techniques. Electrochemical studies of (TiOPc)-O-IV, (MnClPc)-Cl-III, (CoPc)-Pc-II were examined by using cyclic voltammetry (CV) and square wave voltammetry (SWV) techniques. While (MnClPc)-Cl-III showed only metal based reduction reactions, (TiOPc)-O-IV and (CoPc)-Pc-II showed metal based and ligand based reduction reactions as expected. The presence of redox active metal centers like (TiO)-O-IV, (MnCl)-Cl-III, Co-II in the core of Pc ring increases the electrochemical activity of the phthalocyanines. Cyclic and square wave voltammetric studies show that phthalocyanines have reversible/quasi-reversible/irreversible redox processes, which are the main requirement for the technological usage of these compounds. (C) 2015 Elsevier B.V. All rights reserved.