TY - JOUR T1 - Peripherally tetra 1,2,4-triazol substituted novel phthalocyanines: Synthesis, characterization, electrochemical and spectroelectrochemical properties TT - Periferal tetra 1,2,4,-triazol sübstitüe yeni ftalosiyaninler: sentez, karakterizasyon, elektrokimyasal ve spektroelektrokimyasal özellikler AU - Aktaş Kamiloğlu, Ayşe AU - Aydemir, Mehmet AU - Acar, İrfan AU - Sarkı, Gülbınar AU - Koca, Atıf AU - Gümrükçüoğlu, Nurhan AU - Ocak, Ümmühan AU - Kantekin, Halit PY - 2017 DA - December JF - Karadeniz Chemical Science and Technology JO - Karadeniz Chem. Sci. Tech. PB - KCST Founding Board WT - DergiPark SN - 2636-8560 SP - 22 EP - 30 IS - 1 LA - en AB - Inthis study, the synthesis, electrochemical and spectroelectrochemicalproperties of new peripherally 1,2,4-triazole substituted metal-free 4, Zn(II) 5, Ti(IV) 6, Ni(II) 7 and Co(II) 8 phthalocyanine derivatives were reported. Voltammetric and in situ spectroelectrochemicalcharacterization of the complexes were performed in solution. Since nickel andzinc phthalocyanines gave common phthalocyanine ring based electron transferreactions with the characteristic “energy gaps”, “peak to peak potential separations”and “half wave peak potential values”, CoII and TiIVOmetal ions behaved as redox active cations in the core of the cobalt andtitanium phthalocyanine complexes, respectively. While cobalt phthalocyaninegave a one-electron [CoIIPc-2]/[CoIPc-2]-1reduction reaction, titanium phthalocyanine illustrated two metal basedreduction reactions, [TiIVOPc-2]/[TiIIIOPc-2]-1and [TiIIIOPc-2]-1/[TiIIIOPc-2]-2,in addition to the Pc ligand reduction processes. Electron transfer reactionsaltered the spectra of the complexes considerably, which is one of the mostimportant expectations for the practical applications of the complexesespecially in display technologies. Redox and spectral responses of cobalt andtitan complexes were affected by the molecular oxygen present in theelectrolyte, which indicates electrocatalytic and electrosensing activity ofthe complexes towards the molecular oxygen. KW - oxygen reduction reaction KW - spectroelectrochemistry KW - phthalocyanines KW - electrosensor KW - titanium N2 - Bu çalışmada, yeni peripheral 1,2,4-triazol substituemetalsiz 4, Zn(II) 5, Ti(IV) 6, Ni(II) 7 ve Co(II) 8 ftalosiyanin türevlerinin sentezi, elektrokimyasal vespektroelektrokimyasal özellikleri rapor edilmiştir. Komplekslerin voltametrikve in situ spektroelektrokimyasal karakterizasyonu çözelti içindegerçekleştirildi. Nikel ve çinko ftalosiyaninler karakteristik olarak ortak “enerji aralığı”,” pikten pikepotansiyel ayrımlar” ve “yarım dalga pik potansiyel değerleri” ile ftalosiyaninhalka bazlı elektron transfer reaksiyonu verirken, kobalt ve titanyumftalosiyanin komplekslerinin kavitesinde bulunan CoII ve TiIVOmetal iyonları redoks aktif katyon olarak davranmıştır. Kobalt ftalosiyaninindirgenme reaksiyonunda bir elektron [CoIIPc-2]/[CoIPc-2]-1 verirken, titanyum ftalosiyanin Pcligand indirgenme işlemine ek olarak, iki tane metal bazlı indirgenmereaksiyonu [TiIVOPc-2]/[TiIIIOPc-2]-1ve [TiIIIOPc-2]-1/[TiIIIOPc-2]-2göstermiştir. Elektron transfer reaksiyonları komplekslerin spektrumlarını oldukçadeğiştirmiştir. Bu durum komplekslerin özellikle görüntüleme teknolojisindepratik uygulamalarda en önemli beklentidir. Kobalt ve titanyum komplekslerininredoks ve spektral yanıtları elektrolitte var olan moleküler oksijen tarafındanetkilenmiştir. 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