Luminescent Ruthenium Polypyridyl Complexes Containing Pendant Pyridinium Acceptors

Autor:	P. Subramanian, Michelle Absi, Christine A. Berg-Brennan, Joseph T. Hupp, Charlotte L. Stern
Rok vydání:	1996
Předmět:	chemistry.chemical_classification Quenching (fluorescence) Chemistry chemistry.chemical_element Electron acceptor Photochemistry Redox Ruthenium Inorganic Chemistry chemistry.chemical_compound Electron transfer Intersystem crossing Excited state Pyridinium Physical and Theoretical Chemistry
Zdroj:	Inorganic Chemistry. 35:3719-3722
ISSN:	1520-510X 0020-1669
Popis:	Direct attachment of putative electron acceptors ((bi)pyridinium ions) to either Ru(bpy)32+ or Ru(1,10-phenanthroline)32+ (excellent photo-excited-state electron donors) leads to enhancement of excited-state lifetimes, rather than the diminution anticipated from electron transfer quenching. An evaluation of photo redox and emission energetics suggests that charged “quencher” attachment lengthens luminescence lifetimes by (a) diminishing the reductant strength of the photo excited state, (b) inhibiting intersystem crossing to a short-lived d−d state, and/or (c) diminishing Franck−Condon factors for nonradiative decay.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::176e5635b7f0deddb5edd9d649fb4034 https://doi.org/10.1021/ic951040k Zobrazit plný text záznamu