info:eu-repo/semantics/article
A Hole Delocalization Strategy: Photoinduced Mixed-Valence MLCT States Featuring Extended Lifetimes
Fecha
2019-05Registro en:
Aramburu Troselj, Bruno Martín; Oviedo, Paola Soledad; Pieslinger, German Eduardo; Hodak, Jose Hector; Baraldo Victorica, Luis Mario; et al.; A Hole Delocalization Strategy: Photoinduced Mixed-Valence MLCT States Featuring Extended Lifetimes; American Chemical Society; Inorganic Chemistry; 58; 16; 5-2019; 10898-10904
0020-1669
CONICET Digital
CONICET
Autor
Aramburu Troselj, Bruno Martín
Oviedo, Paola Soledad
Pieslinger, German Eduardo
Hodak, Jose Hector
Baraldo Victorica, Luis Mario
Guldi, Dirk M.
Cadranel, Alejandro
Resumen
Bimetallic trans-[RuII(tpm)(bpy)(μNC)RuII(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.