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


SYNTHETIC METALS, cilt.201, ss.18-24, 2015 (SCI İndekslerine Giren Dergi) identifier identifier


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.