Ultrafast exciton relaxation in the B850 antenna complex of Rhodobacter sphaeroides

V. Nagarajan; R. G. Alden; Joann Williams; W. W. Parson

doi:10.1073/pnas.93.24.13774

Ultrafast exciton relaxation in the B850 antenna complex of Rhodobacter sphaeroides

V. Nagarajan, R. G. Alden, Joann Williams, W. W. Parson

Molecular Sciences, School of (SMS)

Research output: Contribution to journal › Article › peer-review

104 Scopus citations

Abstract

Spectral changes were measured with femtosecond resolution following low-intensity, broad-band excitation of the peripheral antenna complex of the purple photosynthetic bacterium Rhodobacter sphaeroides. Absorption anisotropy decays also were measured. We identified a 35-fs relaxation of the absorption and emission spectra of the excited state, as well as a 20- fs anisotropy decay. We interpret these results as interlevel relaxation and dephasing, respectively, of extensively delocalized exciton states of the circular bacteriochlorophyll aggregate.

Original language	English (US)
Pages (from-to)	13774-13779
Number of pages	6
Journal	Proceedings of the National Academy of Sciences of the United States of America
Volume	93
Issue number	24
DOIs	https://doi.org/10.1073/pnas.93.24.13774
State	Published - Nov 26 1996

ASJC Scopus subject areas

General

Access to Document

10.1073/pnas.93.24.13774

Cite this

@article{ca5e7c8da9f145d09fee1b74ae4a1df7,

title = "Ultrafast exciton relaxation in the B850 antenna complex of Rhodobacter sphaeroides",

abstract = "Spectral changes were measured with femtosecond resolution following low-intensity, broad-band excitation of the peripheral antenna complex of the purple photosynthetic bacterium Rhodobacter sphaeroides. Absorption anisotropy decays also were measured. We identified a 35-fs relaxation of the absorption and emission spectra of the excited state, as well as a 20- fs anisotropy decay. We interpret these results as interlevel relaxation and dephasing, respectively, of extensively delocalized exciton states of the circular bacteriochlorophyll aggregate.",

author = "V. Nagarajan and Alden, {R. G.} and Joann Williams and Parson, {W. W.}",

year = "1996",

month = nov,

day = "26",

doi = "10.1073/pnas.93.24.13774",

language = "English (US)",

volume = "93",

pages = "13774--13779",

journal = "Proceedings of the National Academy of Sciences of the United States of America",

issn = "0027-8424",

publisher = "National Academy of Sciences",

number = "24",

}

TY - JOUR

T1 - Ultrafast exciton relaxation in the B850 antenna complex of Rhodobacter sphaeroides

AU - Nagarajan, V.

AU - Alden, R. G.

AU - Williams, Joann

AU - Parson, W. W.

PY - 1996/11/26

Y1 - 1996/11/26

N2 - Spectral changes were measured with femtosecond resolution following low-intensity, broad-band excitation of the peripheral antenna complex of the purple photosynthetic bacterium Rhodobacter sphaeroides. Absorption anisotropy decays also were measured. We identified a 35-fs relaxation of the absorption and emission spectra of the excited state, as well as a 20- fs anisotropy decay. We interpret these results as interlevel relaxation and dephasing, respectively, of extensively delocalized exciton states of the circular bacteriochlorophyll aggregate.

AB - Spectral changes were measured with femtosecond resolution following low-intensity, broad-band excitation of the peripheral antenna complex of the purple photosynthetic bacterium Rhodobacter sphaeroides. Absorption anisotropy decays also were measured. We identified a 35-fs relaxation of the absorption and emission spectra of the excited state, as well as a 20- fs anisotropy decay. We interpret these results as interlevel relaxation and dephasing, respectively, of extensively delocalized exciton states of the circular bacteriochlorophyll aggregate.

UR - http://www.scopus.com/inward/record.url?scp=0030479339&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0030479339&partnerID=8YFLogxK

U2 - 10.1073/pnas.93.24.13774

DO - 10.1073/pnas.93.24.13774

M3 - Article

C2 - 8943011

AN - SCOPUS:0030479339

SN - 0027-8424

VL - 93

SP - 13774

EP - 13779

JO - Proceedings of the National Academy of Sciences of the United States of America

JF - Proceedings of the National Academy of Sciences of the United States of America

IS - 24

ER -

Ultrafast exciton relaxation in the B850 antenna complex of Rhodobacter sphaeroides

Abstract

ASJC Scopus subject areas

Access to Document

Other files and links

Fingerprint

Cite this