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  • 1
    Electronic Resource
    Electronic Resource
    Resonant two-photon ionization spectroscopy of C6H6-(SF6)1,2 (1993)
    Springer
    The European physical journal 26 (1993), S. 213-216 
    Details
    ISSN: 1434-6079
    Keywords: 33.20.Lg ; 36.40.+d
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Vibrationally resolved electronic spectra of heteroclusters C6H6-SF6 and C6H6-(SF6)2 were studied in the spectral regions near the S0-S1, 0 0 0 and 6 0 1 transitions of the benzene monomer. A nonvanishing 0 0 0 vibrational band has been observed for C6H6-SF6 with a C3v symmetry. For both clusters we have determined the ionization potentials as well as the binding energies in the electronic ground state and the ionization state. The fragmentation of larger clusters (C6H6)n(SF6)m is restricted to the loss of SF6 molecules while the emission of C6H6 molecules have not been observed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01429148
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    Paper (German National Licenses)
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  • 2
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    Efficient deactivation of a model base pair via excited-state hydrogen transfer (2004)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2004-12-04
    Description: We present experimental and theoretical evidence for an excited-state deactivation mechanism specific to hydrogen-bonded aromatic dimers, which may account, in part, for the photostability of the Watson-Crick base pairs in DNA. Femtosecond time-resolved mass spectroscopy of 2-aminopyridine clusters reveals an excited-state lifetime of 65 +/- 10 picoseconds for the near-planar hydrogen-bonded dimer, which is significantly shorter than the lifetime of either the monomer or the 3- and 4-membered nonplanar clusters. Ab initio calculations of reaction pathways and potential-energy profiles identify the mechanism of the enhanced excited-state decay of the dimer: Conical intersections connect the locally excited 1pipi* state and the electronic ground state with a 1pipi* charge-transfer state that is strongly stabilized by the transfer of a proton.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Schultz, Thomas -- Samoylova, Elena -- Radloff, Wolfgang -- Hertel, Ingolf V -- Sobolewski, Andrzej L -- Domcke, Wolfgang -- New York, N.Y. -- Science. 2004 Dec 3;306(5702):1765-8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Max Born Institute Berlin, Max-Born-Strasse 2a, D-10247 Berlin, Germany. schultz@mbi-berlin.de〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/15576616" target="_blank"〉PubMed〈/a〉
    Keywords: Aminopyridines/*chemistry ; *Base Pairing ; Chemistry, Physical ; DNA/*chemistry ; Dimerization ; Hydrogen/*chemistry ; Hydrogen Bonding ; Mass Spectrometry ; Models, Chemical ; Physicochemical Phenomena ; Protons ; Thermodynamics ; Ultraviolet Rays
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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