الفهرس 
IntroductionOnly 14 pages are availabe for public view
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Abstract
Eight new Schiff base complexes are prepared from the reaction of Ag(I), Cr(III), Fe(III), Co(II), Cu(II), Cd(II), Hg(II) and U(VI) metal ions with Schiff base ligand, N1,N2-bis(furan-2-ylmethylene)-4-methylbenzene-1,2-diamine (L). Also, Fe(III), Co(II), Cu(II) and Cd(II) mixed ligand complexes are synthesized in the presence of 2,2`-bipyridine as a second ligand.
The ligand and its complexes are characterized by elemental analysis, spectroscopic studies such as mass spectra, molar conductance, IR, 1H NMR, solid reflectance, magnetic susceptibility measurements, thermal analysis and PXRD study.
Mass spectrum of the ligand agreed with the proposed molecular formula, C17H14N2O2, and presence of its molecular ion peak in the mass spectra of the complexes confirming the complexation.
Conductance data shows that the complexes are electrolytes except Co(II), Cu(II), and Hg(II) metal complexes are shown to be non-electrolytes.
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The IR spectra of the complexes show characteristic bands due to (C=N) and (C-O-C) absorption with the remarkable shift with respect to those of the free ligand suggesting the coordination of the metal ions through nitrogen atoms of the azomethine groups and oxygen atoms of the furan moieties. Also, IR spectra of Ag(I), Cr(III) and Cd(II) metal complexes, and Cd(II) mixed ligand complex show the existence of ionic nitrate group, that was also supported by the conductance measurements. Cr(III) and Cd(II) metal complexes spectra show bands characteristic for the monodentate and bidentate nitrate group, respectively. Uranyl metal complex exhibit characteristic band assigned to (O=U=O) stretching vibration.
The azomethine proton in the Ag(I), Cd(II), Hg(II) and U(VI) metal complexes, and Cd(II) mixed ligand complex is shifted from the azomethine proton of the ligand confirming the coordination via the azomethine group.
The measured values of the magnetic moment for the complexes show that Ag(I), Cd(II), Hg(II) and U(VI) metal complexes, and Cd(II) mixed ligand complex are diamagnetic, while Cr(III), Fe(III), Co(II) and Cu(II) metal complexes in addition to Fe(III), Co(II) and Cu(II) mixed ligand complexes
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are paramagnetic suggesting octahedral environments around the metal ions.
The diffuse reflectance spectra of the Cr(III), Fe(III), Co(II) and Cu(II) metal complexes, and Fe(III), Co(II) and Cu(II) mixed ligand complexes show d-d electronic transitions. While Ag(I), Cd(II), Hg(II) and U(VI) metal complexes, and Cd(II) mixed ligand complex, (d0 and d10 systems) are diamagnetic and hence where no d–d transitions are expected.
Thermal studies indicated a high thermal stability of all the complexes. The decomposition mass losses of the complexes are found to be in accordance with the molecular weight of each complex proposed from the elemental analysis. Metal or metal oxide is found to be as a final residue, except in the Hg(II) complex that decompose completely.
The activation thermodynamic parameters are calculated graphically via two methods, Coats-Redfern and Horowitz-Metzeger methods.
Powder X-ray diffraction analysis (PXRD) of the Ag(I), Cr(III), Fe(III), Co(II), Cu(II) and Cd(II) metal complexes show their crystalline nature.
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Theoretical calculations are applied for the ligand and its Ag(I), Cr(III), Fe(III), Co(II), Cu(II), and Cd(II) metal complexes in addition to Fe(III), Co(II) and Cu(II) mixed ligand complexes by DFT method.
Fe2O3, Co3O4, CuO and CdO nanoparticle metal oxides are synthesized by thermolysis from their metal complexes, then were characterized by IR and PXRD studies.
The photocatalytic activity of the MB dye towards synthesized nano metal oxides are studied.
The fluorescence spectra of the metal complexes, except Cd(II) and U(VI), show that the fluorescence emission intensity of the Schiff base (L) increased on complexation. Therefore, all the synthesized compounds could be used as photoactive materials.
The electrolytic nature of the complexes show that the synthesized complexes could be used as potential materials in solar cell systems due to their semiconducting properties.
The ligand and its complexes are screened for their antibacterial activity against two gram-positive and two gram-negative bacteria species, and also for their antifungal activity against two local fungal species. Results show that Cd(II)
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complexes could be used as drugs in the pharmaceutical purposes.
In vitro anticancer properties of the ligand and its Ag(I), Cr(III), Fe(III), Co(II), Cu(II) and Cd(II) metal complexes are screened against Hep-G2 cancer cell lines. Cd(II) metal complex is the highest potent with respect to the free ligand and other complexes that is also more potent than vinblastine standard drug and so can be used as anticancer