| Autor: |
Battistella, Beatrice, Iffland‐Mühlhaus, Linda, Schütze, Maximillian, Cula, Beatrice, Kuhlmann, Uwe, Dau, Holger, Hildebrandt, Peter, Lohmiller, Thomas, Mebs, Stefan, Apfel, Ulf‐Peter, Ray, Kallol |
| Přispěvatelé: |
Publica |
| Jazyk: |
angličtina |
| Rok vydání: |
2023 |
| Předmět: |
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| Popis: |
In many metalloenzymes sulfur-containing ligands participate in catalytic processes, mainly via the involvement in electron transfer reactions. In a biomimetic approach, we now demonstrate the implication of S-ligation in cobalt mediated Oxygen Reduction Reactions (ORR). A comparative study between the catalytic ORR capabilities of the four-nitrogen bound [Co(cyclam)]2+ (cyclam = 1,5,8,11-tetraaza-cyclotetradecane) (1) and the S-containing analog [Co(S2N2-cyclam)]2+ (S2N2-cyclam = 1,8-dithia-5,11-diaza-cyclotetradecane, (2) reveals improved catalytic performance once the chalcogen is introduced in the Co coordination sphere. Trapping and characterization of the intermediates formed upon dioxygen activation at the Co(II) centers in 1 and 2 point to the involvement of sulfur in the O2 reduction process as the key for the improved catalytic ORR capabilities of 2. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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