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'fluorescence' in keywords Facet   Publication Year 1997  [X]
Facet   section ZfN Section A:Volume 052  [X]
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1Author    HansE. Wilhelm, Horst Gebert, Wolfgang RegensteinRequires cookie*
 Title    Effect of Substituents on the Viscosity Dependence of Fluorescence and on the S l -T l Energy Gap of Donor-Acceptor Substituted Trans-Stilbenes  
 Abstract    The dependence of fluorescence quantum yields and Sj-lifetimes of donor-acceptor substituted trans-stilbenes on temperature was measured in the temperature range from 298 to 100 K, using solutions of stilbenes in 3-methylpentane (3-MP). Measurements of fluorescence and phosphores-cence spectra show that the triplet energy is almost independent of the acceptor. The S[-energy and the S r Ti energy gap decrease with increasing acceptor strength. For all compounds intersystem crossing (ISC) S, —» T, is negligible. 
  Reference    Z. Naturforsch. 52a, 837—842 (1997); received November 18 1997 
  Published    1997 
  Keywords    Stilbenes, Fluorescence, Phosphorescence, Singlet-Triplet Energy Gap, Rate Constants 
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 TEI-XML for    default:Reihe_A/52/ZNA-1997-52a-0837.pdf 
 Identifier    ZNA-1997-52a-0837 
 Volume    52