Carotenoid mediated B800-B850 coupling in LH2

Brent P. Krueger, Gregory D. Scholes, Ian R. Gould, Graham R. Fleming

Research output: Contribution to journalArticle

9 Scopus citations

Abstract

Ab initio calculations of the excited state properties of a portion of the LH2 complex consisting of a supermolecule of two B850 bacteriochlorophyll (BChl), one B800 BChl, and one rhodopin glucoside carotenoid show significant mixing between the BChl and carotenoid states. Calculation of the B800-B850 coulombic coupling, through the transition density cube method, both with and without the carotenoid reveal that the carotenoid affects an increase in the B800-B850 coupling via an indirect (superexchange) mechanism. This carotenoid-mediated coupling explains a portion of the difference between the B800-B850 energy transfer rate determined experimentally and through traditional (Förster) calculations.

Original languageEnglish (US)
Article number8
JournalPhysChemComm
Volume2
StatePublished - Jul 20 1999
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Physical and Theoretical Chemistry

Fingerprint Dive into the research topics of 'Carotenoid mediated B800-B850 coupling in LH2'. Together they form a unique fingerprint.

  • Cite this

    Krueger, B. P., Scholes, G. D., Gould, I. R., & Fleming, G. R. (1999). Carotenoid mediated B800-B850 coupling in LH2. PhysChemComm, 2, [8].