Abstract:

The use of redox active ligands in coordination chemistry has long garnered interest in chemical research due to their usefulness in imparting desirable properties in metal complexes such as electron transfer, the stabilization of unusual oxidation states, and the promotion of interesting electronic spectral properties as well as enhanced reactivity. Here, using recently reported synthetic methodologies, the N-heterocyclic donor pyrazole has been examined as a lewis basic donor on aromatic frameworks, most notably at the 2-position of various aryl-amines which are well known electron donors. In this work, these electron donating chelate ligands have been studied with respect to the synthesis, structure, and properties with different metals. The complexes of these ligands have been observed to give rise to interesting properties such as luminescence and intra-molecular electron transfer as a result of the inherent electron donating ability of the aryl amines which hold promise for future use in devices and reactive chemistry.