Ultrafast exciton dynamics after Soret- or Q-band excitation of a directly β,β′-linked bisporphyrin
Kullmann M, Hipke A, Nuernberger P, Bruhn T, Goetz DCG, Sekita M, Guldi DM, Bringmann G, Brixner T (2012)
Publication Type: Journal article, Original article
Publication year: 2012
Journal
Original Authors: Kullmann M., Hipke A., Nuernberger P., Bruhn T., Götz D.C.G., Sekita M., Guldi D.M., Bringmann G., Brixner T.
Publisher: Royal Society of Chemistry
Book Volume: 14
Pages Range: 8038-8050
Journal Issue: 22
DOI: 10.1039/c2cp23608g
Abstract
We report on a comprehensive transient absorption study with β,β′-linked bis[tetraphenylporphyrinato-zinc(ii)] and its corresponding monomer, covering the ultrafast dynamics from femtoseconds up to several microseconds. By exciting these porphyrins either to their first (S ) or second (S ) electronically excited states and by probing the subsequent dynamics, a multitude of reaction pathways have been identified. In the spectral region associated with the ground-state recovery of the bisporphyrin, transient absorption changes occur within the first few picoseconds, which are ascribable to excitonic interaction both in the S (fs time-domain) and in the S (ps time-domain) state. This is substantiated by complementary experiments with the monomeric porphyrin, in which the S state exhibits a longer lifetime. In contrast to the picosecond dynamics the bisporphyrin and the monomer behave similarly on the nanosecond time-scale, that is nearly all excited molecules eventually reach a long-lived triplet excited state. © 2012 the Owner Societies.
Authors with CRIS profile
Michael Sekita
Lehrstuhl für Physikalische Chemie I
Dirk Michael Guldi
Lehrstuhl für Physikalische Chemie I
Involved external institutions
Germany (DE)How to cite
APA:
Kullmann, M., Hipke, A., Nuernberger, P., Bruhn, T., Goetz, D.C.G., Sekita, M.,... Brixner, T. (2012). Ultrafast exciton dynamics after Soret- or Q-band excitation of a directly β,β′-linked bisporphyrin. Physical Chemistry Chemical Physics, 14(22), 8038-8050. https://dx.doi.org/10.1039/c2cp23608g
MLA:
Kullmann, Martin, et al. "Ultrafast exciton dynamics after Soret- or Q-band excitation of a directly β,β′-linked bisporphyrin." Physical Chemistry Chemical Physics 14.22 (2012): 8038-8050.
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