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'Excitation Energy Transfer' in keywords Facet   section ZfN Section C:Volume 039  [X]
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1984 (1)
1Author    SeymourSteven BrodyRequires cookie*
 Title    Flash Photolysis of Liposomes Containing Chlorophyll and Zeaxanthin, as a Function of Temperature (2 °—34 °C)  
 Abstract    The transfer o f triplet excitation from chlorophyll to zeaxanthin in lip osom es is a function o f temperature and pigment concentration. At 525 nm both chlorophyll and zeaxanthin triplet states are observed. The result is a biphasic increase in absorption. The rise time o f absorption by the chlorophyll triplet is much faster, than by the zeaxanthin triplet. With increasing temperature the contribution o f absorption by zea­ xanthin (relative to that o f chlorophyll) at 525 nm increases, and its rise tim e gets faster. At high ratios o f zeaxanthin to chlorophyll, temperature has less effect on both the rise tim e and absorption by the zeaxanthin triplet state. The chlorophyll triplet is measured at 780 nm. It decays faster with increasing temperature and or increasing ratio o f zeaxanthin to chlorophyll. The results are interpreted in terms of: increasing fluidity o f the lipid lip osom e with tem per­ ature, formation o f zeaxanthin-chlorophyll com plexes at high ratios o f zeaxanthin and chloro­ phyll, presence o f different lipid phases in the lip osom e bilayer. 
  Reference    Z. Naturforsch. 39c, 1108—1111 (1984); received June 15 1984 
  Published    1984 
  Keywords    Chlorophyll, Carotenoid, Liposomes, Triplet States, Excitation Energy Transfer 
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 TEI-XML for    default:Reihe_C/39/ZNC-1984-39c-1108.pdf 
 Identifier    ZNC-1984-39c-1108 
 Volume    39