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Merging of a Perylene Moiety Enables a RuII Photosensitizer with Long‐Lived Excited States and the Efficient Production of Singlet Oxygen.

Authors :
Schmid, Marie‐Ann
Brückmann, Jannik
Bösking, Julian
Nauroozi, Djawed
Karnahl, Michael
Rau, Sven
Tschierlei, Stefanie
Source :
Chemistry - A European Journal. 1/3/2022, Vol. 28 Issue 1, p1-8. 8p.
Publication Year :
2022

Abstract

Multichromophoric systems based on a RuII polypyridine moiety containing an additional organic chromophore are of increasing interest with respect to different light‐driven applications. Here, we present the synthesis and detailed characterization of a novel RuII photosensitizer, namely [(tbbpy)2Ru((2‐(perylen‐3‐yl)‐1H‐imidazo[4,5‐f][1,10]‐phenanthrolline))](PF6)2RuipPer, that includes a merged perylene dye in the back of the ip ligand. This complex features two emissive excited states as well as a long‐lived (8 μs) dark state in acetonitrile solution. Compared to prototype [(bpy)3Ru]2+‐like complexes, a strongly altered absorption (ϵ=50.3×103 M−1 cm−1 at 467 nm) and emission behavior caused by the introduction of the perylene unit is found. A combination of spectro‐electrochemistry and time‐resolved spectroscopy was used to elucidate the nature of the excited states. Finally, this photosensitizer was successfully used for the efficient formation of reactive singlet oxygen. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
09476539
Volume :
28
Issue :
1
Database :
Academic Search Index
Journal :
Chemistry - A European Journal
Publication Type :
Academic Journal
Accession number :
154484140
Full Text :
https://doi.org/10.1002/chem.202103609