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Title: Femtosecond transient dynamics of a heptametallic HAT-ruthenium(II) complex. A photophysical study
Authors: Latterini, L ×
Schweitzer, Gerd
De Schryver, Frans
Moucheron, C
Kirsch-DeMesmaeker, A #
Issue Date: Jan-1997
Publisher: Elsevier science bv
Series Title: Chemical Physics Letters vol:281 issue:4-6 pages:267-271
Abstract: A photophysical study of a heptametallic HAT-rathenium(II) complex, {Ru(HAT)(3)[Ru(phen)(2)](6)}(14+) (where phen = 1,10-phenanthroline and HAT = 1,4,5,8,9,12-hexa-azatriphenylene), has been carried out using steady state and time resolved techniques. The absence of luminescence suggests that polycomplexation changes the properties of the Ru-bridging HAT luminophore inducing a decrease of the radiative rate constant and an enhancement of the non-radiative decay channel. By femtosecond transient absorption measurements a decay time of 1.9 ns has been measured for the (MLCT)-M-3 state formed upon excitation at 590 nm. Furthermore the data give information on the relaxation processes leading to the formation of the MLCT triplet state. Upon excitaton, a single decay time of 1.4 ps has been determined. The lack of faster decays, within the instrumental time resolution, may indicate that this is a relaxation time from the Frank-Condon state produced upon excitation to the triplet MLCT state. (C) 1997 Elsevier Science B.V.
URI: 
ISSN: 0009-2614
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Molecular Imaging and Photonics
× corresponding author
# (joint) last author

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