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Exciton dynamics in the light-harvesting complexes of Rhodobacter sphaeroides

Pullerits, T. LU ; Chachisvilis, M. LU ; Jones, M. R. ; Hunter, C. N. and Sundström, V. LU (1994) In Chemical Physics Letters 224(3-4). p.355-365
Abstract

We have used ≈ 40 fs pulses from a Ti:Sa laser to investigate the ultrafast energy transfer and relaxation dynamics in the LH1 and LH2 light-harvesting pigment-proteins of photosynthetic purple bacteria. Our results reveal a new feature, not earlier observed in light-harvesting pigments, ultrafast relaxation characterized by a time constant of approximately 20 fs, which we interpret as interexciton state relaxation. The experimental results are compared with computer simulations of transient excited state absorption from the excited states of an excitonic aggregate.

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author
; ; ; and
publishing date
type
Contribution to journal
publication status
published
in
Chemical Physics Letters
volume
224
issue
3-4
pages
11 pages
publisher
Elsevier
external identifiers
  • scopus:0000402982
ISSN
0009-2614
DOI
10.1016/0009-2614(94)00561-3
language
English
LU publication?
no
id
c65ed656-8fcf-4759-944e-f096e864a686
date added to LUP
2025-08-26 12:06:11
date last changed
2025-09-02 13:27:06
@article{c65ed656-8fcf-4759-944e-f096e864a686,
  abstract     = {{<p>We have used ≈ 40 fs pulses from a Ti:Sa laser to investigate the ultrafast energy transfer and relaxation dynamics in the LH1 and LH2 light-harvesting pigment-proteins of photosynthetic purple bacteria. Our results reveal a new feature, not earlier observed in light-harvesting pigments, ultrafast relaxation characterized by a time constant of approximately 20 fs, which we interpret as interexciton state relaxation. The experimental results are compared with computer simulations of transient excited state absorption from the excited states of an excitonic aggregate.</p>}},
  author       = {{Pullerits, T. and Chachisvilis, M. and Jones, M. R. and Hunter, C. N. and Sundström, V.}},
  issn         = {{0009-2614}},
  language     = {{eng}},
  month        = {{07}},
  number       = {{3-4}},
  pages        = {{355--365}},
  publisher    = {{Elsevier}},
  series       = {{Chemical Physics Letters}},
  title        = {{Exciton dynamics in the light-harvesting complexes of <i>Rhodobacter sphaeroides</i>}},
  url          = {{http://dx.doi.org/10.1016/0009-2614(94)00561-3}},
  doi          = {{10.1016/0009-2614(94)00561-3}},
  volume       = {{224}},
  year         = {{1994}},
}