Novel Zinc(II) and Cobalt(II) Phthalocyanines Bearing Piperazine Derivative: Spectroscopic and Electrochemical Properties

Year 2017, Volume: 43 Issue: 1, 41 - 57, 28.04.2017

Emine Bayraktaroğlu Pervin Deveci

Abstract

In this manuscript, novel zinc (II) and cobalt (II) phthalocyanine
complexes (ZnPc and CoPc) modified with tert-butyl
4-(4-(3,4-dicyanophenoxy)phenyl)piperazine-1-carboxylate substituents have been
prepared and characterized. These complexes are solouble in many organic
solvents such as DMF, DMSO, THF and CHCl₃. Aggregation properties of
complexes were examinated in different solvents and different concentrations.
Spectroscopic evaluation of the Pcs showed a monomeric behaviour evidenced by a
single Q band for ZnPc and CoPc up to 1 .10^-5  mol dm^-3 in DMF, DMSO and
THF as typical of metallo Pcs. In all studied organic solvents except CHCl₃,
ZnPc and CoPc complexes were non-aggregated. Cyclic and square wave
voltammetries were used to evaluate the electrochemical properties of the
synthesized complexes. Cyclic voltammetry showed two reduction couples and one
oxidation peak for the two phthalocyanine complexes.

Keywords

Phthalocyanine, Aggregation, Zn(II) complex, Co(II) complex, Electrochemistry

Piperazin Türevi İçeren Yeni Çinko (II) ve Kobalt (II) Ftalosiyaninlerin Sentezi, Spektroskopik ve Elektrokimyasal Özelliklerinin İncelenmesi

Abstract

Bu çalışmada,
ter-butil4-(4-(3,4-disiyanofenoksi)fenil)piperazin-1-karboksilat grubu ihtiva
eden yeni Zn(II) ve kobalt(II) ftalosiyanin kompleksleri elde edilerek,
yapıları karakterize edilmiştir. Her iki kompleks te, DMF, DMSO, THF ve CHCl₃
gibi polar çözücülerde çözünmektedir. Komplekslerin farklı çözücü ve
konsantrasyonlarda agregasyon özellikleri de incelenmiştir. DMF, DMSO ve THF
çözücülerinde 1.10^-5 M konsantrasyona kadar her iki kompleksinde
agregasyona uğramadığı, fakat CHCl₃ çözücüsünde agregasyona
uğradıkları gözlenmiştir. Ayrıca komplekslerin elektrokimyasal özellikleri
dönüşümlü voltametri ve kare dalga voltametri teknikleriyle incelenmiştir.

Keywords

Ftalosiyanin, Agregasyon, Zn(II) kompleks, Co(II) kompleks, Elektrokimya

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