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- Title
Consecutive Ligand‐Based Electron Transfer in New Molecular Copper‐Based Water Oxidation Catalysts.
- Authors
Gil‐Sepulcre, Marcos; Garrido‐Barros, Pablo; Oldengott, Jan; Funes‐Ardoiz, Ignacio; Bofill, Roger; Sala, Xavier; Benet‐Buchholz, Jordi; Llobet, Antoni
- Abstract
Water oxidation to dioxygen is one of the key reactions that need to be mastered for the design of practical devices based on water splitting with sunlight. In this context, water oxidation catalysts based on first‐row transition metal complexes are highly desirable due to their low cost and their synthetic versatility and tunability through rational ligand design. A new family of dianionic bpy‐amidate ligands of general formula H2LNn− (LN is [2,2′‐bipyridine]‐6,6′‐dicarboxamide) substituted with phenyl or naphthyl redox non‐innocent moieties is described. A detailed electrochemical analysis of [(L4)Cu]2− (L4=4,4′‐(([2,2′‐bipyridine]‐6,6′‐dicarbonyl)bis(azanediyl))dibenzenesulfonate) at pH 11.6 shows the presence of a large electrocatalytic wave for water oxidation catalysis at an η=830 mV. Combined experimental and computational evidence, support an all ligand‐based process with redox events taking place at the aryl‐amide groups and at the hydroxido ligands.
- Subjects
OXIDATION of water; CATALYSTS; CHARGE exchange; TRANSITION metal complexes; WATER waves; ELECTROCHEMICAL analysis
- Publication
Angewandte Chemie, 2021, Vol 133, Issue 34, p18787
- ISSN
0044-8249
- Publication type
Article
- DOI
10.1002/ange.202104020