Direct observation of the (forbidden) S-1 state in carotenoids

Forskningsoutput: TidskriftsbidragArtikel i vetenskaplig tidskrift

Abstract

Carotenoids are involved in a variety of biological functions, yet the underlying mechanisms are poorly understood, in part because of the long-standing difficulty in assigning the location of the first excited (S-1) state. Here, we present a method for determining the energy of the forbidden S-1 state, on the basis of ultrafast spectroscopy of the short lived level. Femtosecond transient absorption spectra and kinetics of the S-1 --> S-2 transition revealed the location of the intermediate level in two carotenoid species involved in the xanthophyll cycle, zeaxanthin and violaxanthin, and yielded surprising implications regarding the mechanism of photoregulation in photosynthesis.

Detaljer

Författare
Enheter & grupper
Forskningsområden

Ämnesklassifikation (UKÄ) – OBLIGATORISK

  • Biologiska vetenskaper
  • Atom- och molekylfysik och optik

Nyckelord

Originalspråkengelska
Sidor (från-till)4914-4917
TidskriftProceedings of the National Academy of Sciences
Volym96
Utgivningsnummer9
StatusPublished - 1999
PublikationskategoriForskning
Peer review utfördJa