@article{Wachtler2015-03-20Ultra-30813,
  year={2015},
  doi={10.1002/chem.201406350},
  title={Ultrafast Intramolecular Relaxation and Wave‐Packet Motion in a Ruthenium‐Based Supramolecular Photocatalyst},
  number={21},
  volume={21},
  issn={0947-6539},
  journal={Chemistry - A European Journal},
  pages={7668--7674},
  author={Wächtler, Maria and Guthmuller, Julien and Kupfer, Stephan and Maiuri, Margherita and Brida, Daniele and Popp, Jürgen and Rau, Sven and Cerullo, Giulio and Dietzek, Benjamin}
}

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    <dc:creator>Popp, Jürgen</dc:creator>
    <dc:contributor>Popp, Jürgen</dc:contributor>
    <dc:creator>Guthmuller, Julien</dc:creator>
    <dcterms:issued>2015-03-20</dcterms:issued>
    <dc:creator>Kupfer, Stephan</dc:creator>
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    <dcterms:title>Ultrafast Intramolecular Relaxation and Wave‐Packet Motion in a Ruthenium‐Based Supramolecular Photocatalyst</dcterms:title>
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    <dc:contributor>Rau, Sven</dc:contributor>
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    <dc:creator>Brida, Daniele</dc:creator>
    <dc:creator>Dietzek, Benjamin</dc:creator>
    <dcterms:abstract xml:lang="eng">The hydrogen-evolving photocatalyst [(tbbpy)&lt;sub&gt;2&lt;/sub&gt;Ru(tpphz)Pd(Cl)&lt;sub&gt;2&lt;/sub&gt;]&lt;sup&gt;2+&lt;/sup&gt; (tbbpy=4,4′-di-tert-butyl-2,2′-bipyridine, tpphz=tetrapyrido[3,2-a:2′,3′-c:3′′,2′′-h:2′′′,3′′′-j]phenazine) shows excitation-wavelength-dependent catalytic activity, which has been correlated to the localization of the initial excitation within the coordination sphere. In this contribution the excitation-wavelength dependence of the early excited-state relaxation and the occurrence of vibrational coherences are investigated by sub-20 fs transient absorption spectroscopy and DFT/TDDFT calculations. The comparison with the mononuclear precursor [(tbbpy)&lt;sub&gt;2&lt;/sub&gt;Ru(tpphz)]&lt;sup&gt;2&lt;/sup&gt;+ highlights the influence of the catalytic center on these ultrafast processes. Only in the presence of the second metal center, does the excitation of a &lt;sup&gt;1&lt;/sup&gt;MLCT state localized on the central part of the tpphz bridge lead to coherent wave-packet motion in the excited state.</dcterms:abstract>
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    <dc:creator>Maiuri, Margherita</dc:creator>
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    <dc:creator>Rau, Sven</dc:creator>
    <dc:contributor>Dietzek, Benjamin</dc:contributor>
    <dc:contributor>Brida, Daniele</dc:contributor>
    <dc:contributor>Maiuri, Margherita</dc:contributor>
    <dc:creator>Cerullo, Giulio</dc:creator>
    <dc:creator>Wächtler, Maria</dc:creator>
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    <dc:contributor>Kupfer, Stephan</dc:contributor>
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