A Near-Infrared Transient Absorption Study of the Excited-State Dynamics of the Carotenoid Spirilloxanthin in Solution and in the LH1 Complex of Rhodospirillum rubrum.
Papagiannakis, E ; van Stokkum, I H M ; van Grondelle, R ; Niederman, R A ; Zigmantas, Donatas LU
; Sundström, Villy
LU
and Polivka, Tomas
LU
(2003)
In The Journal of Physical Chemistry Part B
107(40).
p.11216-11223
- Abstract
- The spectroscopic properties of spirilloxanthin in an nhexane solution and bound to the core light-harvesting LH1) complex of Rhodospirillum rubrum were studied by near infrared ultrafast transient absorption spectroscopy. Global analysis of the kinetic traces measured after excitation of spirilloxanthin to the S2 (1Bu +) state enabled us to estimate the species-associated difference spectra that correspond to the excited-state absorption signals originating from the S1 (2Ag-) and S2 states. Analysis of the absorption originating from the S2 state has provided further insight into the characterization of the spirilloxanthin excited states, while by analyzing the profile of the S1-S2 transition, we place the energy of the S1 state of... (More)
- The spectroscopic properties of spirilloxanthin in an nhexane solution and bound to the core light-harvesting LH1) complex of Rhodospirillum rubrum were studied by near infrared ultrafast transient absorption spectroscopy. Global analysis of the kinetic traces measured after excitation of spirilloxanthin to the S2 (1Bu +) state enabled us to estimate the species-associated difference spectra that correspond to the excited-state absorption signals originating from the S1 (2Ag-) and S2 states. Analysis of the absorption originating from the S2 state has provided further insight into the characterization of the spirilloxanthin excited states, while by analyzing the profile of the S1-S2 transition, we place the energy of the S1 state of all-trans-spirilloxanthin at 11 500 cm-1, both in solution and in the LH1 complex. This low value excludes excitation energy transfer from the S1 state of spirilloxanthin to bacteriochlorophyll in the LH1 complex of Rs. rubrum and explains the observed low energy transfer efficiency from spirilloxanthin to bacteriochlorophyll in that complex. Our results indicate that the S* state of spirilloxanthin, which was recently found both in solution and in the LH1 complex (Gradinaru, C. C., et al. Proc. Natl. Acad. Sci. U.S.A. 2001, 98, 2364), does not exhibit detectable spectral features in the near-infrared region. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/128186
- author
- Papagiannakis, E
; van Stokkum, I H M
; van Grondelle, R
; Niederman, R A
; Zigmantas, Donatas
LU
; Sundström, Villy
LU
and Polivka, Tomas
LU
- organization
- publishing date
- 2003
- type
- Contribution to journal
- publication status
- published
- subject
- in
- The Journal of Physical Chemistry Part B
- volume
- 107
- issue
- 40
- pages
- 11216 - 11223
- publisher
- The American Chemical Society (ACS)
- external identifiers
-
- wos:000185756900034
- scopus:0242323638
- ISSN
- 1520-5207
- DOI
- 10.1021/jp034931j
- language
- English
- LU publication?
- yes
- additional info
- The information about affiliations in this record was updated in December 2015. The record was previously connected to the following departments: Chemical Physics (S) (011001060)
- id
- 01299526-3c32-4d50-9d14-05313580f1d7 (old id 128186)
- date added to LUP
- 2016-04-01 16:23:26
- date last changed
- 2022-04-15 04:12:30
@article{01299526-3c32-4d50-9d14-05313580f1d7,
abstract = {{The spectroscopic properties of spirilloxanthin in an nhexane solution and bound to the core light-harvesting LH1) complex of Rhodospirillum rubrum were studied by near infrared ultrafast transient absorption spectroscopy. Global analysis of the kinetic traces measured after excitation of spirilloxanthin to the S2 (1Bu +) state enabled us to estimate the species-associated difference spectra that correspond to the excited-state absorption signals originating from the S1 (2Ag-) and S2 states. Analysis of the absorption originating from the S2 state has provided further insight into the characterization of the spirilloxanthin excited states, while by analyzing the profile of the S1-S2 transition, we place the energy of the S1 state of all-trans-spirilloxanthin at 11 500 cm-1, both in solution and in the LH1 complex. This low value excludes excitation energy transfer from the S1 state of spirilloxanthin to bacteriochlorophyll in the LH1 complex of Rs. rubrum and explains the observed low energy transfer efficiency from spirilloxanthin to bacteriochlorophyll in that complex. Our results indicate that the S* state of spirilloxanthin, which was recently found both in solution and in the LH1 complex (Gradinaru, C. C., et al. Proc. Natl. Acad. Sci. U.S.A. 2001, 98, 2364), does not exhibit detectable spectral features in the near-infrared region.}},
author = {{Papagiannakis, E and van Stokkum, I H M and van Grondelle, R and Niederman, R A and Zigmantas, Donatas and Sundström, Villy and Polivka, Tomas}},
issn = {{1520-5207}},
language = {{eng}},
number = {{40}},
pages = {{11216--11223}},
publisher = {{The American Chemical Society (ACS)}},
series = {{The Journal of Physical Chemistry Part B}},
title = {{A Near-Infrared Transient Absorption Study of the Excited-State Dynamics of the Carotenoid Spirilloxanthin in Solution and in the LH1 Complex of Rhodospirillum rubrum.}},
url = {{http://dx.doi.org/10.1021/jp034931j}},
doi = {{10.1021/jp034931j}},
volume = {{107}},
year = {{2003}},
}