《Influence of Ligand Denticity and Flexibility on the Molecular Copper Mediated Oxygen Reduction Reaction》 was written by Smits, Nicole W. G.; van Dijk, Bas; de Bruin, Iris; Groeneveld, Samantha L. T.; Siegler, Maxime A.; Hetterscheid, Dennis G. H.. Electric Literature of C12H13N3 And the article was included in Inorganic Chemistry in 2020. The article conveys some information:
To date, the Cu complex with the tris(2-pyridylmethyl)amine (tmpa) ligand (Cu-tmpa) catalyzes the ORR with the highest reported turnover frequency (TOF) for any mol. Cu catalyst. To gain insight into the importance of the tetradentate nature and high flexibility of the tmpa ligand for efficient four-electron ORR catalysis, the redox and electrocatalytic ORR behavior of the Cu complexes of 2,2′:6′,2”-terpyridine (terpy) and bis(2-pyridylmethyl)amine (bmpa) (Cu-terpy and Cu-bmpa, resp.) were studied. With a combination of cyclic voltammetry and rotating ring disk electrode measurements, the presence of the terpy and bmpa ligands results in a decrease in catalytic ORR activity and an increase in faradaic efficiency for H2O2 production The lower catalytic activity is the result of a stabilization of the CuI state of the complex compared to the earlier reported Cu-tmpa catalyst. This stabilization is most likely caused by the lower electron donating character of the tridentate terpy and bmpa ligands compared to the tetradentate tmpa ligand. The Laviron plots of the redox behavior of Cu-terpy and Cu-bmpa indicated that the formation of the ORR active catalyst involves relatively slow electron transfer kinetics which is caused by the inability of Cu-terpy and Cu-bmpa to form the preferred tetrahedral coordination geometry for a CuI complex easily. The authors’ study illustrates that both the tetradentate nature of the tmpa ligand and the ability of Cu-tmpa to form the preferred tetrahedral coordination geometry for a CuI complex are of utmost importance for ORR catalysis with very high catalytic rates. Redox and electrocatalytic ORR behavior of the mononuclear Cu complexes of 2,2′:6′,2”-terpyridine (terpy) and bis(2-pyridylmethyl)amine (bmpa) in neutral aqueous buffer solution: High faradaic efficiencies for H2O2 production were revealed along the ORR active potential window using the rotating ring disk electrode (RRDE), and the foot-of-the-wave anal. (FOWA) was applied to describe the catalytic activity quant. Addnl., the stability of the catalysts under operating conditions receives considerable attention.Bis(pyridin-2-ylmethyl)amine(cas: 1539-42-0Electric Literature of C12H13N3) was used in this study.
Bis(pyridin-2-ylmethyl)amine(cas: 1539-42-0) is a secondary amine with two picolyl substituents. As a tridentate ligand this compound provides three nitrogen donors that affords good selectivity for Zn2+ over biologically relevant metals such as Na+, K+, Mg2+ and Ca2+, and leaves coordination sites free for anion binding. Electric Literature of C12H13N3