Monatshefte für Chemie / Chemical Monthly

, Volume 115, Issue 8–9, pp 1071–1080 | Cite as

Zur Chemie von Pyrrolpigmenten, 55. Mitt.

Phytochrommodellstudien: Zum Einfluß nicht konjugierter Ladungen auf den 2,3-Dihydrobilatrien-abc-Chromophor
  • Heinz Falk
  • Ulrich Zrunek
Organische Chemie Und Biochemie

On the chemistry of pyrrole pigments, LV: Phytochrome model studies: On the influence of non-conjugated charges on the 2,3-dihydrobilatriene-abc chromophor


2,3-Dihydrobilatrienes-abc substituted with carboxy and amino residue bearing groups in 3- and 12-positions have been prepared. Spectrophotometric titrations of these derivatives revealed that the influence of a non-conjugated positive or negative charge in the vicinity of the chromophore has only marginal influence on the absorption spectra. Rather small hypsochromic and bathochromic shifts of the long wavelength absorption band were observed and are discussed with respect to their origin. The results indicate that the influence of non-conjugated charges is not a main reason for spectral shifts accompanying photochemical and thermal transformations of the phytochrome chromophore.


2,3-Dihydrobilatrienes-abc Non-conjugated charges Phytochrome models UV-VIS spectra 


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Copyright information

© Springer-Verlag 1984

Authors and Affiliations

  • Heinz Falk
    • 1
  • Ulrich Zrunek
    • 1
  1. 1.Institut für Analytische, Organische und Physikalische ChemieJohannes-Kepler-Universität LinzLinzÖsterreich

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