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Updated: Sep 19, 2025

The Synthesis, Characterization and Reactivity of a Series of Ruthenium N-triphosPh Complexes
Published on: April 10, 2015
Nature of Anti-Dissipative High-Energy Excited States in Quaterpyridine-Bridged Ruthenium Complexes
Noémie Chantry1, Agustina Cotic2,3, Simon De Kreijger1
1Université catholique de Louvain (UCLouvain), Institut de la Matière Condensée et des Nanosciences (IMCN), Molecular Chemistry, Materials and Catalysis (MOST), Place Louis Pasteur 1, bte L4.01.02, Louvain-la-Neuve, 1348, Belgium.
Abstract:
High-energy excited states with slow rates for internal conversion to the lowest-energy excited state are prone to be intercepted before they dissipate energy to the medium. In a previous report, oligomeric Ru(II) photosensitizers bearing a bridging 2,2':5',3″:6″,2‴-quaterpyridine scaffold showed promising anti-dissipative behavior in photoinduced electron transfer reactivity. In here, a range of electron accepting and electron donating substituents were incorporated on the ancillary 2,2'-bipyridine ligands to modulate the excited-state dynamics. This allowed to unambiguously identify the nature of high-energy excited states and derive design guidelines for the achievement of anti-dissipative behavior in oligomeric Ru(II) polypyridines relevant for solar fuels production and photoredox catalysis.
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