Triplet−Triplet Energy Transfer between Porphyrins Linked via a Ruthenium(II) Bisterpyridine Complex

Autor:	Lucia Flamigni, Nicola Armaroli, J. A. Gareth Williams, Barbara Ventura, Francesco Barigelletti, Jean-Paul Collin, Jean-Pierre Sauvage,† and
Rok vydání:	1999
Předmět:	Molecular model chemistry.chemical_element Triad (anatomy) Photochemistry Porphyrin Ruthenium Inorganic Chemistry chemistry.chemical_compound medicine.anatomical_structure chemistry medicine Steady state (chemistry) Physical and Theoretical Chemistry Terpyridine Triplet state Ground state
Zdroj:	Inorganic Chemistry. 38:661-667
ISSN:	1520-510X 0020-1669
Popis:	The photophysical properties of a multicomponent array consisting of a free-base aryl-porphyrin and a gold(III) aryl-porphyrin, assembled via a central bis(terpyridine) ruthenium(II) complex, PH2−Ru−PAu, have been studied in low-temperature glassy media by steady state and time-resolved methods. Comparison of the photophysical properties of this triad with those of the reference molecular models and of the related dyads (Ru−PH2, Ru−PAu) allows the photoinduced processes occurring in PH2−Ru−PAu to be elucidated. The photoinduced processes in glassy media in the dyads Ru−PH2 and Ru−PAu are basically similar to those occurring at room temperature where the absorbed energy is transferred with 100% efficiency to the pertinent porphyrin lowest triplet state. For Ru-3PAu the decay to the ground state is similar to the model 3PAu and displays double-exponential behavior, while in the case of Ru−3PH2 some perturbing effect of the ruthenium center in accelerating the inter-system crossing to the ground state by the...
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::e908f509858af68d4add6333880a94ed https://doi.org/10.1021/ic980847k Zobrazit plný text záznamu