Journal
INORGANIC CHEMISTRY
Volume 58, Issue 16, Pages 10898-10904Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.inorgchem.9b01254
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Funding
- University of Buenos Aires [UBACyT 20020130100534BA]
- CONICET [PIP 112-20150100394CO]
- ANPCyT [PICT 2013 00069]
- ANPCyT
- DAAD-ALEARG
- CONICET
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Bimetallic trans- [Ru-II(tpm)(bpy)(mu NC)-Ru-II(L)(4)(CN)](2+), where bpy is 2,2'-bipyridine, tpm is tris(1-pyrazolyl)methane and L = 4-methoxypyridine (MeOpy) or pyridine (py), was examined using ultrafast vis-NIR transient absorption spectroscopy. Of great relevance are the longest lived excited states in the form of strongly coupled photoinduced mixed-valence systems, which exhibit intense photoinduced absorptions in the NIR and are freely tunable by the judicious choice of the coordination spheres of the metallic ions. Using the latter strategy, we succeeded in tailoring the excited state lifetimes of bimetallic complexes and, in turn, achieving significantly longer values relative to related monometallic complexes. Notable is the success in extending the lifetimes, when considering the higher density of vibrational states, as they are expected to facilitate nonradiative ground-state recovery.
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