Electrochemical and spectroelectrochemical properties of thiadiazole substituted metallo-phthalocyanines.
4-Thiadiazole substituted phthalonitrile and peripherally tetra-substituted phthalocyanine Cu(II), Fe(II) and Ti(IV)O complexes have been synthesized for the first time. Electrochemical properties of these complexes were determined with voltammetric and in situ spectroelectrochemical measurements. CuPc has redox inactive Cu(2+) center, therefore it gave three Pc based reduction and two Pc based oxidation processes. TiOPc and FePc complexes gave metal based redox processes in addition to Pc based redox reactions due to the redox activity of Ti(4+)O and Fe(2+) metal centers. Although FePc also gave three reduction and two oxidation reactions, peak potentials of these processes are different than those of CuPc due to the different assignments of the redox reactions. TiOPc went to five reduction and one oxidation reactions. Assignments of the redox processes were carried out with in situ spectroelectrochemical measurements. Spectra and color of the electrogenerated redox species of the complexes were also determined with in situ spectroelectrochemical and in situ electrocolorimetric measurements. Distinct color differences between the electrogenerated redox species were observed, which indicated their possible electrochromic usages.
Department of Chemistry, Faculty of Science, Karadeniz Technical University, 61080 Trabzon, Turkey.
Ümit
Ü
Demirbaş
Department of Chemical Engineering, Engineering Faculty, Marmara University, 34722, Göztepe, Istanbul, Turkey.
Duygu
D
Akyüz
Department of Chemistry, Faculty of Science, Karadeniz Technical University, 61080 Trabzon, Turkey.
Burak
B
Barut
Department of Medical Laboratory Techniques, Vocational School of Health Services, Sinop University, 57000 Sinop, Turkey.
Rıza
R
Bayrak
Department of Chemical Engineering, Engineering Faculty, Marmara University, 34722, Göztepe, Istanbul, Turkey.
Atıf
A
Koca
Department of Chemistry, Faculty of Science, Karadeniz Technical University, 61080 Trabzon, Turkey. Electronic address: halit@ktu.edu.tr.
Halit
H
Kantekin
Electrochemistry; Metallophthalocyanine; Phthalocyanine; Spectroelectrochemistry; Thiadiazole