Electronic absorption and Raman studies of the radical anion and dianion of a polyene molecule (19,19′,20,20′-tetranor-β,β-carotene)

Jin Yeol Kim, Yukio Furukawa, Mitsuo Tasumi

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

The electronic absorption and Raman spectra of the radical anion and dianion of 19,19′,20,20′-tetranor-β,β-carotene, a polyene molecule with eleven conjugated C=C bonds, have been studied. The radical anion has an intense absorption at 1.46 eV and a weak absorption at 1.00 eV, while the dianion has an intense absorption at 1.59 eV. The C=C stretching (v1) band of the radical anion is 26 cm-1 lower, whereas the v1 band of the dianion is 15 cm-1 higher, than that of the neutral species. This upshift observed for the dianion suggests large structural changes such as inversion of bond alternation. The CH in-plane-bending (v2) bands of the radical anion and the dianion, both observed at 1275 cm-1, are 15 cm-1 lower than that of the neutral species and may be used as a marker of negatively charged polyenes.

Original languageEnglish
Pages (from-to)418-422
Number of pages5
JournalChemical Physics Letters
Volume276
Issue number5-6
Publication statusPublished - 1997 Sep 26
Externally publishedYes

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Polyenes
carotene
Carotenoids
Anions
anions
Molecules
electronics
molecules
alternations
electronic spectra
markers
Stretching
Raman scattering
Absorption spectra
methylidyne
inversions
Raman spectra
absorption spectra

ASJC Scopus subject areas

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

Cite this

Electronic absorption and Raman studies of the radical anion and dianion of a polyene molecule (19,19′,20,20′-tetranor-β,β-carotene). / Kim, Jin Yeol; Furukawa, Yukio; Tasumi, Mitsuo.

In: Chemical Physics Letters, Vol. 276, No. 5-6, 26.09.1997, p. 418-422.

Research output: Contribution to journalArticle

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