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Abstract
The synthesis and characterisation of an asymmetric potential bridging ligand bmptpphz (bmptpphz = 2,17-bis(4-methoxyphenyl)tetrapyrido[3,2-a:2’,3’-c:3’’,2’’-h:2’’’,3’’’-j] phenazine) is presented. This ligand contains a 1,10-phenanthroline (phen) and a 2,9-disubstituted phen sphere and possesses a strong absorbance in the visible. Facile coordination of the phen sphere to a Ru(tbbpy)2 core leads to Ru(bmptpphz) ([(tbbpy)2Ru(bmptpphz)](PF6)2; tbbpy = 4,4’-di-tert-butyl-2,2’-bipyridine). UV-vis, emission, resonance Raman and theoretical investigations show that this complex possesses all properties associated with a Ru(tpphz) ([(tbbpy)2Ru(tpphz)](PF6)2; tpphz = tetrapyrido[3,2-a:2’,3’-c:3’’,2’’-h:2’’’,3’’’-j] phenazine) moiety and that the ligand based absorbances in the vis-part also populate an MLCT like state. The coordination of a Pd-core in the new 2,9-disubstituted phen sphere is possible, leading to a cyclometallation. The tridentate complexation leads to changes in the UV-vis and emission behaviour. Furthermore, the stability of the Pd-coordination is significantly enhanced if compared to the unsubstituted Ru(tpphz). Ru(bmptpphz)PdCl proved to be an active photocatalyst for H2 evolution, albeit with lower activity than the mother compound Ru(tpphz)PdCl2.
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Authors (12)
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M. Pfeffer
- University of Ulm Institute of Inorganic Chemistry Materials and Catalysis
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L. Zedler
- University in Jena Institute of Physical Chemistry
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S. Kupfer
- University in Jena Institute of Physical Chemistry
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M. Paul
- University in Jena Institute of Physical Chemistry
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M. Schwalbe
- Berlin Univestitat Department of Chemistry
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K. Peuntinger
- Berlin Universytat Department of Chemistry and Pharmacy and Interdyscyplinary Center for Molecular Materials
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D. Guldi
- Berlin Universytat Department of Chemistry and Pharmacy and Interdyscyplinary Center for Molecular Materials
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J. Popp
- Universyty Jena Institute of Physical Chemistry and Abbe Center of Photonics
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S. Gräfe
- Universyty Jena Institute of Physical Chemistry and Abbe Center of Photonics
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B. Dietzek
- Universyty Jena Institute of Physical Chemistry and Abbe Center of Photonics
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S. Rau
- University of Ulm Institute of Inorganic Chemistry Materials and Catalysis
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Details
- Category:
- Articles
- Type:
- artykuł w czasopiśmie wyróżnionym w JCR
- Published in:
-
DALTON TRANSACTIONS
no. 43,
edition 30,
pages 76 - 86,
ISSN: 1477-9226 - Language:
- English
- Publication year:
- 2014
- Bibliographic description:
- Pfeffer M., Zedler L., Kupfer S., Paul M., Schwalbe M., Peuntinger K., Guldi D., Guthmuller J., Popp J., Gräfe S., Dietzek B., Rau S.: Tuning of photocatalytic activity by creating a tridentate coordination sphere for palladium// DALTON TRANSACTIONS. -Vol. 43, iss. 30 (2014), s.76-86
- DOI:
- Digital Object Identifier (open in new tab) 10.1039/c4dt01034e
- Verified by:
- Gdańsk University of Technology
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