Electronic spectra of carotenoids. Schiff's bases of carotenal and carotenones

Thomas A. Moore, Pill Soon Song

Research output: Contribution to journalArticlepeer-review

6 Scopus citations


Visible absorption bands of β-apo-8′-carotenal, citranaxanthin, and reticulataxanthin Schiff's bases are measured and analyzed in relation to the visual chromophore, retinal Schiff's base. The former shows a strong red shift of the absorption maxima upon protonation in ethanol, and the magnitude of the band shift is comparable to that of retinal Schiff's base. Molecular orbital analysis of the ground and excited state electronic structures of both types of Schiff's bases suggests the usefulness of carotenal Schiff's bases as a model for comparative studies with visual chromophore.

Original languageEnglish (US)
Pages (from-to)224-232
Number of pages9
JournalJournal of molecular spectroscopy
Issue number2
StatePublished - Aug 1974
Externally publishedYes

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Spectroscopy
  • Physical and Theoretical Chemistry


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