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Wednesday, April 26 • 1:00pm - 1:20pm
Synthesis And Analysis Of Octahedral Co(III) Mixed Bidentate Ligand Complexes

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Octahedral mixed ligand cobalt(III) complexes derived from bidentate nitrogenous ligands such as ethylenediamine (en), 2,2’-bipyridine (bpy), and 1,10-phenanthroline (phen) have garnered interest for their usage in diverse applications such as bacterial inhibition (biochemistry) and increased photocathode efficiency in dye-sensitized solar cells (materials science). While much research has been undertaken on unmixed ligand complexes of Co(III), relatively little has been reported on the mixed complexes. The goal of this project is to investigate more efficient synthesis schemes for higher yields of these complexes, and to also record information via ultraviolet-visible (UV-vis) spectroscopy for determining and comparing the complexes’ structural properties. Two experiments are presented from this project. In the first experiment, the synthesis of [Co(bpy)2(phen)]Cl3 is discussed. This complex was obtained in very low yield, calling into question the quality of the synthesis and demanding a revised reaction scheme. In the second experiment, the synthesis of trans-[Co(en)2Cl2]Cl is presented. Comparisons of the UV-vis spectra of the synthesized complex, its CoCl2·6H2O starting material, and a commercially purchased sample of complex are presented. The findings from these experiments will be used for further developments and characterization of these cobalt complexes and their utilities in other fields of science.


Wednesday April 26, 2017 1:00pm - 1:20pm PDT
123 Zeis Hall