Supramolecular exciton chirality of carotenoid aggregates

M. Simonyi, Zsolt Bikádi, F. Zsila, J. Deli

Research output: Contribution to journalArticle

84 Citations (Scopus)

Abstract

The conventional organic chemistry concept of chirality relates to single molecules. This article deals with cases in which exciton chirality is generated by the interaction of associated carotenoids. The handed property responsible for exciton signals in these systems is due to the alignment of neighboring molecules held together by secondary chemical forces. Their mutual positions are characterized by the overlay angle. Experimental manifestation is obtained by spectroscopic studies on carotenoid aggregates. Compared to molecular spectra, both UV/visible and circular dichroism spectroscopic observations reveal modified absorption bands and induced Cotton effects of opposite sign (exciton couplets), respectively. A new term, " supramolecular exciton chirality," is suggested for these phenomena, allowing the detection of weak chemical interactions not readily accessible for experimental studies, although highly important in the mechanism of biological processes.

Original languageEnglish
Pages (from-to)680-698
Number of pages19
JournalChirality
Volume15
Issue number8
DOIs
Publication statusPublished - 2003

Fingerprint

Chirality
Carotenoids
Excitons
Organic Chemistry Phenomena
Biological Phenomena
Molecules
Dichroism
Circular Dichroism
Cotton
Absorption spectra
LDS 751

Keywords

  • Circular dichroism
  • Exciton signals
  • Induced chirality
  • Overlay angles
  • Structured aggregates

ASJC Scopus subject areas

  • Analytical Chemistry
  • Drug Discovery
  • Organic Chemistry
  • Pharmacology

Cite this

Supramolecular exciton chirality of carotenoid aggregates. / Simonyi, M.; Bikádi, Zsolt; Zsila, F.; Deli, J.

In: Chirality, Vol. 15, No. 8, 2003, p. 680-698.

Research output: Contribution to journalArticle

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