Femtosecond stimulated Raman spectroscopy of the dark S1 excited state of carotenoid in photosynthetic light harvesting complex. | Zendy

M. Yoshizawa | Zendy; Ryosuke Nakamura | Zendy; O. Yoshimatsu | Zendy; Kenta Abe | Zendy; Shunsuke Sakai | Zendy; Katsunori Nakagawa | Zendy; Ritsuko Fujii | Zendy; Mamoru Nango | Zendy; Hideki Hashimoto | Zendy

Open Access

Femtosecond stimulated Raman spectroscopy of the dark S1 excited state of carotenoid in photosynthetic light harvesting complex.

Author(s) -

M. Yoshizawa,

Ryosuke Nakamura,

O. Yoshimatsu,

Kenta Abe,

Shunsuke Sakai,

Katsunori Nakagawa,

Ritsuko Fujii,

Mamoru Nango,

Hideki Hashimoto

Publication year - 2012

Publication title -

acta biochimica polonica

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.452

H-Index - 78

eISSN - 1734-154X

pISSN - 0001-527X

DOI - 10.18388/abp.2012_2169

Subject(s) - excited state , vibrational energy relaxation , femtosecond , raman spectroscopy , relaxation (psychology) , spectroscopy , chemistry , ultrashort pulse , internal conversion , molecular vibration , photochemistry , atomic physics , molecular physics , laser , optics , spectral line , physics , psychology , social psychology , quantum mechanics , astronomy

Vibrational dynamics of the excited state in the light-harvesting complex (LH1) have been investigated by femtosecond stimulated Raman spectroscopy (FSRS). The native and reconstituted LH1 complexes have same dynamics. The ν(1) (C=C stretching) vibrational mode of spirilloxanthin in LH1 shows ultrafast high-frequency shift in the S(1) excited state with a time constant of 0.3 ps. It is assigned to the vibrational relaxation of the S(1) state following the internal conversion from the photoexcited S(2) state.

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