Bazı karbazol schiff bazlarının katyon bağlama özelliklerinin kondüktometrik incelenmesi

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 25oC’de kompleksleşme özelliklerinin belirlenmesi amacıyla iletkenlik davranışları ölçüldü. İletkenlik parametreleri (K, Λ ve α) kullanılarak ligand-katyon kompleksinin kompleksleşme sabiti (Ke ) ve Serbest Entalpi (ΔGθ ) 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.

Conductometric investigation of cation bonding properties of some carbazole schiff bases

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 25oC in a 50% ethanol / water mixture. The Complexation Constant (Ke) and Free Enthalpy (ΔGθ) 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.,

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