title: The electrochemical and spectroelectrochemical properties of metal free and metallophthalocyanines containing triazole/piperazine units.
abstract: The synthesis and characterization of novel peripherally tetra [1,2,4]-triazole substituted metal-free phthalocyanine and its metal complexes (Zn(II), Ni(II), Pb(II), Cu(II) and Fe(II)) and the investigation of electrochemical and spectroelectrochemical properties of metal-free, Zn(II), Pb(II), Fe(II) phthalocyanines were performed for the first time in this study. Electrochemical characterizations of the complexes were performed with voltammetric and in situ spectroelectrochemical measurements. Voltammetric responses of the complexes supported the proposed structures, since complexes bearing redox inactive Pc ring metal centers just gave Pc based electron transfer reactions, while iron phthalocyanine went to metal based electron transfer reaction in addition to the Pc based ones. Electron withdrawing nature of [1,2,4]-triazole substituents shifted the redox processes toward the positive potentials. All complexes were electropolymerized during the oxidation reactions in dichloromethane (DCM) solvent. Types of the metal center of the complexes altered the electropolymerization reactions of the complexes. Spectra and colors of the electrogenerated redox species of the complexes were also determined with in situ spectroelectrochemical and in situ electrocolorimetric measurements.
authors.affiliation: Department of Chemistry, Faculty of Sciences, Karadeniz Technical University, 61080 Trabzon, Turkey.
authors.forename: Ümit
authors.initials: Ü
authors.lastname: Demirbaş
authors.affiliation: Department of Chemical Engineering, Engineering Faculty, Marmara University, 34722, Göztepe, Istanbul, Turkey.
authors.forename: Duygu
authors.initials: D
authors.lastname: Akyüz
authors.affiliation: Department of Chemistry, Faculty of Sciences, Karadeniz Technical University, 61080 Trabzon, Turkey.
authors.forename: Arif
authors.initials: A
authors.lastname: Mermer
authors.affiliation: Department of Chemistry, Faculty of Arts and Sciences, Recep Tayyip Erdoğan University, 53100 Rize, Turkey.
authors.forename: Hakkı Türker
authors.initials: HT
authors.lastname: Akçay
authors.affiliation: Department of Chemistry, Faculty of Sciences, Karadeniz Technical University, 61080 Trabzon, Turkey.
authors.forename: Neslihan
authors.initials: N
authors.lastname: Demirbaş
authors.affiliation: Department of Chemical Engineering, Engineering Faculty, Marmara University, 34722, Göztepe, Istanbul, Turkey.
authors.forename: Atıf
authors.initials: A
authors.lastname: Koca
authors.affiliation: Department of Chemistry, Faculty of Sciences, Karadeniz Technical University, 61080 Trabzon, Turkey. Electronic address: halit@ktu.edu.tr.
authors.forename: Halit
authors.initials: H
authors.lastname: Kantekin
keywords: Electrochemistry; Phthalocyanine; Soluble; Spectroelectrochemistry; Synthesis; Triazole