Conductometric investigation of cation bonding properties of some carbazole schiff bases

Abstract

In this work, the effect of (Z) -9-butyl-N-(2,3,4-trimethoxybenzylidine)-9H-carbazole-3-amine (Schiff-carbazole-anisole, SKA) and (Z)-3-((9-octyl-9H-carbazol-3-ylimino) methyl)benzene-1,2-diol (Schiff-carbazole-phenol, SKF) Carbazole schif base ligands with CaCl₂, MgCl₂, FeSO₄, ZnSO₄ metal ions conductivity behaviors were measured to determine the complexing properties at 25^oC in a 50% ethanol / water mixture. The Complexation Constant (Ke) and Free Enthalpy (ΔG^θ) of the ligand-cation complex were calculated using the conductivity parameters (K, Λ and α). Althought, it was found that the complexation constant was decreased in the direction of Fe²⁺ > Mg²⁺ > Ag⁺ > Ca²⁺ > Zn²⁺ for the SKA compound, it was detected that Zn²⁺ > Fe²⁺ > Ag⁺ > Mg²⁺ > Ca²⁺ for the SKF compound as a result of the conductometric studies. According to the results of this study, ligands can be used in metal sensor, enzyme inhibitor and biological applications.

Keywords

• Electrical conductivity,complex formation constant,ethanol / water mixture,conductometry.

Bazı karbazol schiff bazlarının katyon bağlama özelliklerinin kondüktometrik incelenmesi

Abstract

Bu çalışmada  (Z)-9-butyl- N-(2,3,4-trimethoxybenzylidine)-9H-carbazol-3-amine (Schiff-Karbazol-Anisol, SKA) ve (Z)-3-((9-octyl-9H-carbazol-3-ylimino)methyl) benzene-1,2-diol  (Schiff-Karbazol-Fenol, SKF) orijinal karbazol schiff bazlar ile insan vücudu için büyük önem arz eden AgNO₃, CaCl₂, MgCl₂, FeSO₄, ZnSO₄ metal iyonları arasında % 50 etanol/su ikili karışımında 25^oC’de kompleksleşme özelliklerinin belirlenmesi amacıyla iletkenlik davranışları ölçüldü. İletkenlik parametreleri (K, Λ ve α) kullanılarak ligand-katyon kompleksinin kompleksleşme sabiti (K_e ) ve Serbest Entalpi (ΔG^θ ) hesaplandı. Kondüktometrik olarak yapılan çalışmalar sonucunda SKA bileşiği için kompleksleşme sabiti Fe²⁺> Mg²⁺> Ag⁺> Ca²⁺> Zn²⁺ yönünde azalırken, SKF bileşiği için Zn²⁺ > Fe²⁺ > Ag⁺ > Mg²⁺ > Ca²⁺ yönünde değiştiği tespit edilmiştir. Bu çalışma sonuçlarına göre ligandlar metal sensörü, enzim inhibitörü ve biyolojik uygulamalarda kullanılabilirler.

Keywords

• Elektriksel iletkenlik,kompleks oluşum sabiti,etanol/su karışımı,kondüktometri

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