Unsymmetrical Schiff base (ON) ligand on complexation with some transition metal ions: Synthesis, spectral characterization, antibacterial, fluorescence and thermal studies

Maha Rabea Abu-Serea ; Omyma A.M. Ali ; Samir M. El-Medani 


Abstract


A series of eight metal Schiff base complexes were synthesized by the thermal reaction of Cu(II), Ni(II), Fe(III), Co(II), Zn(II), Hg(II), La(III) or Sm(III) with a Schiff base ‘‘L’’ produced by the condensation of furfuraldehyde and 1,2-diaminobenzene. These compounds were characterized by elemental analysis, UV–Vis, FT-IR, molar conductance, mass spectrometry, thermal and fluorescence studies. The studies suggested the coordination of the ligand L to metal through azomethine imine nitrogen and furan oxygen atoms of Schiff base moiety. Thermogravimetric (TG/DTG) analyses data were studied and indicated high stability for all complexes and suggested the presence of lattice and/or coordinated water molecules in the complexes. Coats–Redfern method has been used to calculate the kinetic and thermodynamic parameters of the metal complexes. The spectral and thermal analysis reveal that all complexes have octahedral geometry except Cu(II) and Ni(II) complexes which can attain a square planner arrangements. The ligand and its complexes exhibited intraligand (p–p⁄) fluorescence and can potentially serve as photoactive materials. Both the ligand and its complexes have been screened for antibacterial activities.


Other data

Keywords Complexes Spectral Fluorescence 1,2-Diaminobenzene Antibacterial activities
Issue Date 2015
Source Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy 136 (2015) 651–660
Journal Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy 
URI http://research.asu.edu.eg/handle/123456789/155801


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