title: Towards time-resolved, coupled structure-function information on carotenoid excited state processes: X-ray and optical short-pulse double resonance spectroscopy.
abstract: A novel soft X-ray and optical short-pulse double resonance spectroscopic technique tailor-made to elucidate processes involving the optically forbidden S1 (2(1)A(g)) state of carotenoids in native biological samples (e.g., photosynthetic antenna complexes) is described. The principle relies on probing the near carbon K-edge absorption of the optically excited sample with soft X-rays generated by a laser-induced plasma. A first application concerns location of the 2(1)A(g) state of beta-carotene in vitro. Further applications are proposed.
authors.affiliation: Max-Born-Institut für Nichtlineare Optik und Kurzzeitspektroskopie, Max-Born-Strasse 2a, D-12489, Berlin, Germany.
authors.forename: H
authors.initials: H
authors.lastname: Stiel
authors.forename: D
authors.initials: D
authors.lastname: Leupold
authors.forename: M
authors.initials: M
authors.lastname: Beck
authors.forename: I
authors.initials: I
authors.lastname: Will
authors.forename: W
authors.initials: W
authors.lastname: Sandner
authors.forename: H
authors.initials: H
authors.lastname: Lokstein
mesh_terms: D001703:Biophysics / Q000295:instrumentation* / Q000379:methods*; D013053:Spectrophotometry / Q000295:instrumentation* / Q000379:methods*; D013997:Time Factors; D014965:X-Rays; D019207:beta Carotene / Q000737:chemistry
chemical_list: D019207:beta Carotene