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Influence of Protonation State on the Excited State Dynamics of a Photobiologically Active Ru(II) Dyad
Abstract
The influence of ligand protonation on the photophysics of a ruthenium (Ru) dyad bearing the 2-(1-pyrenyl)-1H-imidazo[4,5-f][1,10]-phenanthroline (ippy) ligand was investigated by time-resolved transient absorption spectroscopy. It was found that changes in the protonation state of the imidazole group led to changes in the electronic configuration of the lowest lying excited state. Formation of the fully deprotonated imidazole anion resulted in excited state signatures that were consistent with a low-lying intraligand (IL) triplet state. This assignment was supported by time-dependent density functional theory (TDDFT) calculations. IL triplet states have been suggested to be potent mediators of photodynamic effects. Thus, these results are of interest in the design of Ru metal complexes as photosensitizers (PSs) for photodynamic therapy (PDT).
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Authors (9)
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Christian Reichardt
- Fredrich-Schiller University Institute od Physical Chemistry
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Tariq Sainuddin
- Acadia University Leibniz Institute od Photonic Technology
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Maria WäCHTLER
- IPHT Jena
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Susan Monro
- Acadia University Leibniz Institute od Photonic Technology
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Stephan Kupfer
- Fredrich-Schiller University Institute od Physical Chemistry
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Stefanie Gräfe
- Fredrich-Schiller University Institute od Physical Chemistry
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Sherri A. Mcfarland
- Acadia University Leibniz Institute od Photonic Technology
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Benjamin Dietzek
- Fredrich-Schiller University Institute od Physical Chemistry
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- Category:
- Articles
- Type:
- artykuł w czasopiśmie wyróżnionym w JCR
- Published in:
-
JOURNAL OF PHYSICAL CHEMISTRY A
no. 120,
edition 32,
pages 6379 - 6388,
ISSN: 1089-5639 - Language:
- English
- Publication year:
- 2016
- Bibliographic description:
- Reichardt C., Sainuddin T., Wächtler M., Monro S., Kupfer S., Guthmuller J., Gräfe S., Mcfarland S., Dietzek B.: Influence of Protonation State on the Excited State Dynamics of a Photobiologically Active Ru(II) Dyad// JOURNAL OF PHYSICAL CHEMISTRY A. -Vol. 120, iss. 32 (2016), s.6379-6388
- DOI:
- Digital Object Identifier (open in new tab) 10.1021/acs.jpca.6b05957
- Verified by:
- Gdańsk University of Technology
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