Chelation Numbers Differentiate Performances of Co(II) Macrocyclic Catalysts in Electro‐/Photocatalytic CO2 Reduction
Von Wiley-VCH zur Verfügung gestellt
4 vs. 5: Mechanistic studies clarify the role of chelation number in the structure-activity relationship in CO2 reduction catalyzed by pyridiyldiimine-functionalized cobalt macrocyclic catalysts.
Abstract
Mechanistic studies with characterizing crucial intermediates are indispensable in elucidating the promotive effects of ligand modifications, which thereby serve as useful orientations for rational optimization of molecular catalysts for CO2 reduction. Herein we investigate the catalytic mechanism of a CoII catalyst bearing a tetra-dentate macrocyclic ligand by electrochemical and spectroelectrochemical techniques, where its unstable Co0 active species under catalytic conditions accounts for its lower catalytic performance compared to that of another CoII catalyst featuring a similar penta-dentate macrocyclic ligand.
