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Efficient visible light-driven water oxidation catalysed by an iron(iv) clathrochelate complex
Sergii I Shylin1, Mariia V Pavliuk, Luca D'Amario
1Department of Chemistry -Ångström Laboratory, Uppsala University, PO Box 523, 75120 Uppsala, Sweden. sergii.shylin@kemi.uu.se.
Chemical Communications (Cambridge, England)
|February 26, 2019
Summary
A novel iron complex efficiently oxidizes water to oxygen using light. This study identifies a key iron(V) intermediate, advancing water oxidation catalysis research.
Area of Science:
- Inorganic Chemistry
- Photochemistry
- Catalysis
Background:
- Water oxidation is crucial for artificial photosynthesis and renewable energy.
- Developing efficient and stable catalysts for water oxidation remains a significant challenge.
Purpose of the Study:
- To investigate the photochemical water oxidation activity of a water-stable iron(IV) clathrochelate complex.
- To characterize the reactive intermediates involved in the catalytic cycle.
Main Methods:
- Photochemical oxidation experiments were conducted using the iron(IV) clathrochelate complex.
- Electron Paramagnetic Resonance (EPR) and Mössbauer spectroscopy were employed to identify reaction intermediates.
Main Results:
- The iron(IV) complex demonstrated fast and homogeneous photochemical water oxidation to dioxygen.
- A turnover frequency of 2.27 s-1 and a maximum turnover number of 365 were achieved.
- An iron(V) intermediate was successfully trapped and characterized under catalytic conditions.
Conclusions:
- The water-stable iron(IV) clathrochelate complex is a highly effective catalyst for photochemical water oxidation.
- The characterization of the iron(V) intermediate provides crucial insights into the mechanism of this catalytic process.
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