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M. Abdelazi:
"Metal-Ligand Complexes in Rapid Fild Testing for the Assessment of some Environmental Pollutant";
Betreuer/in(nen): W. Linert, S. El-Medani, R. Ramadan; Department of Chemistry, Faculty of Science, Fayoum, 2018; Abschlussprüfung: 25.09.2018.

In this study, azo-Schiff base ligand, [5-Phenylazosalicylidene trishydroxymethylaminomethane] (PAST) and its metal complexes with the general formula M[PAST]2 where, M= [Cu(II), Co(II), Ni(II), Fe(II), Mn(II) and Zn(II)] were synthesized and structurally characterized by elemental analysis, Mass spectra, FTIR, 1H NMR, UV-Vis spectra and magnetic susceptibility measurements.
The mass spectra of the reported ligand (PAST) and its complexes (1-6) show molecular ion peaks at m/z 330 (p+), 712 (p+), 713 (p+), 716 (p+), 716 (p+), 721 (p+) and 723 (p+), respectively. Also electronic spectra and magnetic susceptibility measurements indicate octahedral structure of these complexes.
FTIR measurements showed that the frequency at the azomethine group (-C=N-) was shifted in all the complexes (1-6) from the frequency in the ligand.
The UV-Visible spectra of PAST and its complexes shows two intense absorption bands in the range (370-450 nm) assigned to (π→π*, n→π*) transitions of the azomethine group.
The synthesized complexes were found to be mononuclear octahedral complexes with 1:2 molar ratios. The ligand molecule is chelated to the metal ion through the phenolic hydroxyl oxygen, oxidative and via one of the aliphatic hydroxyl oxygen, as well as with the nitrogen atom of the azomethine group.