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Abstract
A molecular photocatalyst consisting of a RuII photocenter, a tetrapyridophenazine bridging ligand, and a PtX2 (X=Cl or I) moiety as the catalytic center functions as a stable system for light-driven hydrogen production. The catalytic activity of this photochemical molecular device (PMD) is significantly enhanced by exchanging the terminal chlorides at the Pt center for iodide ligands. Ultrafast transient absorption spectroscopy shows that the intramolecular photophysics are not affected by this change. Additionally, the general catalytic behavior, that is, instant hydrogen formation, a constant turnover frequency, and stability are maintained. Unlike as observed for the Pd analogue, the presence of excess halide does not affect the hydrogen generation capacity of the PMD. The highly improved catalytic efficiency is explained by an increased electron density at the Pt catalytic center, this is confirmed by DFT studies.
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Authors (7)
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M. Pfeffer
- Ulm University Institute of Inorganic Chemistry Materials and Catalysis
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Tanja Kowacs
- Ulm University Institute of Inorganic Chemistry Materials and Catalysis
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Maria Wachtler
- Leibniz Institute of Photonic Technology Jena
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Benjamin Dietzek
- Leibniz Institute of Photonic Technology Jena
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Johannes Vos
- Dublin City University SRC for Solar Energy Conversation
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Sven Rau
- Ulm University Institute of Inorganic Chemistry Materials and Catalysis
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Details
- Category:
- Articles
- Type:
- artykuł w czasopiśmie wyróżnionym w JCR
- Published in:
-
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
no. 54,
edition 22,
pages 6627 - 6631,
ISSN: 1433-7851 - Language:
- English
- Publication year:
- 2015
- Bibliographic description:
- Pfeffer M., Kowacs T., Wachtler M., Guthmuller J., Dietzek B., Vos J., Rau S.: Optimization of Hydrogen - Evolving Photochemical Molecular Devices// ANGEWANDTE CHEMIE-INTERNATIONAL EDITION. -Vol. 54, iss. 22 (2015), s.6627-6631
- DOI:
- Digital Object Identifier (open in new tab) 10.1002/anie.201409442
- Verified by:
- Gdańsk University of Technology
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