Picosecond time-resolved luminescence of Pr(III) complexes: Intramolecular excitation energy transfer from ligand to Pr(III)

Autor:	Shinobu Kishi, Ayumi Ishii, Miki Hasegawa
Rok vydání:	2006
Předmět:	Fluorophore Ligand General Chemical Engineering Energy transfer General Physics and Astronomy General Chemistry Photochemistry chemistry.chemical_compound Reaction rate constant chemistry Picosecond Intramolecular force Triplet state Excitation
Zdroj:	Journal of Photochemistry and Photobiology A: Chemistry. 178:220-224
ISSN:	1010-6030
DOI:	10.1016/j.jphotochem.2005.12.005
Popis:	The intramolecular excitation energy transfer from the fluorophore ligand (phens) to Pr(III) in the complexes on the basis of the picosecond time-resolved luminescence spectra is discussed. These complexes exhibit sequentially multiplex emissions from the energy levels on the ligand as π 1 π 1 * in the UV region, and from those on Pr(III) as ff in the visible region. From the decay curve analysis of these emissions, the intramolecular energy transfer pathway was clarified quantitatively following the spin-selection rule. The rate constants of energy transfer from the ligand to Pr(III) were estimated, from the π 1 π 1 * of phen to the 1I6 state of Pr(III) via the triplet state. This mechanism can be applied to control the emission properties of Pr(III) complexes by changing the emissive f-levels due to ligand variations.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::b4bb10928e752ba26858fecadbe34dfe https://doi.org/10.1016/j.jphotochem.2005.12.005 Zobrazit plný text záznamu Full Text from ScienceDirect