Encouraged by these results, we selected the triazolylquinoxaline-based ligands 5a-e to screen their complexation properties with several other metal centers. These compounds can be straightforwardly synthesized and possess a variation in either the substitution of the triazole or the pyrazine ring of the quinoxaline, allowing to investigate the influence of the molecular structure on the complexation properties of triazolylquinoxalines. The ligands were accessed via copper-catalyzed azide-alkyne cycloaddition (CuAAC) from the readily available tetrazolo [1,5-a]quinoxalines 2 as previously described in the literature (see Scheme 1). Scheme 1: Synthesis of triazole-bearing ligands 5 for the complexation with different metal centers. The numbering of the triazole atom is indicated in blue.