umu.sePublikationer
Ändra sökning
RefereraExporteraLänk till posten
Permanent länk

Direktlänk
Referera
Referensformat
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Annat format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annat språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf
Photophysical characterization of natural cis-carotenoids
Umeå universitet, Teknisk-naturvetenskaplig fakultet, Kemi.
2001 (Engelska)Ingår i: PHOTOCHEMISTRY AND PHOTOBIOLOGY, ISSN 0031-8655, Vol. 74, nr 4, s. 549-57Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

By means of steady-state fluorescence spectroscopy we explore the photophysics of two lowest lying singlet excited states in two natural 15-cis-carotenoids, namely phytoene and phytofluene, possessing three and five conjugated double bonds (N), respectively. The results are interpreted in relation to the photophysics of all-trans-carotenoids with varying N. The fluorescence of phytofluene is more Stokes-shifted relative to that of phytoene, and is ascribed to the forbidden S-1 --> S-0 transition, with its first excited singlet state (S-1) lying 3340 cm(-1) below the dipole allowed second excited singlet state (S-2), at 77 K. For phytoene the S-2 and S-1 potential surfaces are closer in energy, probably giving rise to the mixed S-2 and S-1 fluorescence characteristics. The origin of phytoene fluorescence is discussed and is suggested to be due to the S-1 --> S-0 transition; with the S-1 state located 1100 cm(-1) below S-2 at 77 K. The dependence of the fluorescence quantum yield on temperature and viscosity shows that large amplitude molecular motions are involved in the radiationless relaxation process of phytoene. The transition dipole moment of absorption and emission are parallel in phytoene and nonparallel in phytofluene.

Ort, förlag, år, upplaga, sidor
2001. Vol. 74, nr 4, s. 549-57
Identifikatorer
URN: urn:nbn:se:umu:diva-8686OAI: oai:DiVA.org:umu-8686DiVA, id: diva2:148357
Tillgänglig från: 2008-02-05 Skapad: 2008-02-05 Senast uppdaterad: 2018-06-09Bibliografiskt granskad

Open Access i DiVA

Fulltext saknas i DiVA

Övriga länkar

http://apps.isiknowledge.com/InboundService.do?product=WOS&action=retrieve&SrcApp=EndNote&UT=000171786700006&SID=P2J45KMFcaKd8nLjfB7&SrcAuth=ResearchSoft&mode=FullRecord&customersID=ResearchSoft&DestFail=http%3A%2F%2Fwww.isinet.com%2Fisi%2Fproducts%2Fesource%2Fservice.html

Personposter BETA

Gillbro, Tomas

Sök vidare i DiVA

Av författaren/redaktören
Gillbro, Tomas
Av organisationen
Kemi

Sök vidare utanför DiVA

GoogleGoogle Scholar

urn-nbn

Altmetricpoäng

urn-nbn
Totalt: 35 träffar
RefereraExporteraLänk till posten
Permanent länk

Direktlänk
Referera
Referensformat
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Annat format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annat språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf