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1984 (1)
1Author    PaavoH. HynninenRequires cookie*
 Title    Electron Donor-Acceptor Properties of 10(S)-Chlorophyll a  
 Abstract    Evidence for the self-aggregation o f 10(S)-chlorophyll a (= chlorophyll a') in nonpolar solvents has been obtained by means o f absorption spectroscopy in the visible and infrared regions. The visible absorption spectrum of chlorophyll a' exhibits a shoulder at 680 nm in aliphatic hydrocar­ bon solvents and the infrared spectrum measured in carbon tetrachloride contains an "aggrega­ tion peak" at 1650 cm "1. IR spectroscopy shows, in addition, that the C-10 epim ers o f chlorophyll a are both present as monom ers in tetrahydrofuran. H ow ever, in the presence of a small amount o f aliphatic alcohol or water, the IR spectrum in tetrahydrofuran at lowered tem peratures exhibits an intense, wide absorption band at ~ 1650 cm -1 which was interpreted as arising from the hydrogen bonding o f the hydroxyl group to the C-9 keto carbonyl o f the chlorophyll. 
  Reference    Z. Naturforsch. 39b, 675 (1984); received July 12 1983 
  Published    1984 
  Keywords    Chlorophyll Epim ers, Chlorophyll Organization, Stereochem istry, Photosynthesis, Infrared Spectra, Absorption Spectra 
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 TEI-XML for    default:Reihe_B/39/ZNB-1984-39b-0675.pdf 
 Identifier    ZNB-1984-39b-0675 
 Volume    39