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A Family of Ru II Photosensitizers with High Singlet Oxygen Quantum Yield: Synthesis, Characterization, and Evaluation
Author(s) -
Pefkianakis Eleftherios K.,
Christodouleas Dionysios,
Giokas Dimosthenis L.,
Papadopoulos Kyriakos,
Vougioukalakis Georgios C.
Publication year - 2013
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.201300431
Subject(s) - chemistry , singlet oxygen , ruthenium , photochemistry , quantum yield , photosensitizer , pyridine , moiety , anthracene , ligand (biochemistry) , singlet state , quinoline , oxygen , fluorescence , catalysis , medicinal chemistry , stereochemistry , excited state , organic chemistry , biochemistry , physics , receptor , quantum mechanics , nuclear physics
A series of Ru II ‐based photosensitizers were synthesized and extensively characterized. The ligand utilized to coordinate ruthenium was a pyridine–quinoline hybrid bearing an anthracene moiety, and it was combined with commercially available 2,2′‐bipyridine (bpy) for the heteroleptic complexes. The produced bichromophoric complexes show very strong and wide UV/Vis absorption bands. The ability of these complexes to act as triplet photosensitizers in the production of singlet oxygen was thoroughly studied by utilizing the photooxidation of 1,3‐diphenylisobenzofuran as the test reaction. The most efficient photosensitizer in this new family of Ru II complexes affords singlet oxygen quantum yields and production‐rate efficiencies up to two times higher than those of the benchmark [Ru(bpy) 3 ] 2+ parent complex.