Mononuclear Erbium (III) Complex with Tetradentate N2O2 Schiff Base Ligand

Kamaran Basheer Hussein

doi:10.21271/ZJPAS.33.4.7

Authors

Kamaran Basheer Hussein College of Education ,Chemistry Department,Salahaddin university-Erbil,Iraq.

DOI:

https://doi.org/10.21271/ZJPAS.33.4.7

Keywords:

Salen ligand , ONNO donor atoms, Er(III) , antibacterial studies

Abstract

The synthesis of a tetradentate Schiff-base ligand bis(salicylidene)ethylenediamine from salicylaldehyde and ethylenediamine , are important class of ligands . The results of the C.H.N study revealed the formation of a 1:1 [M:L] ratio. .[Er(Salen)(NO₃)₂]^-, square antiprismatic geometry, is the proposed structure of lanthanide metal complex. ¹H-NMR, FT-IR, UV-Visible spectral mesurements, and molar conductance were used to estimate the synthesized Schiff-base ligand and its complex.

The stoichiometry of the complex has been found to be 1:1 (Er:Salen) matching with C.H.N. analysis. After deprotonation, spectral studies revealed that the ligand was tetradentately coordinated to the metal ion (N₂O₂) through azomethine nitrogen and phenolic oxygen. The biological activities of the Schiff base (Salen , H₂L) and Er(III) complex against E.coli and Staphylococcus bacteria were examined, Schiff base ligand being less active than Erbium (III) complex.

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