2D Electronic Spectroscopy Reveals Excitonic Structure in the Baseplate of a Chlorosome
Dostal, Jakub LU ; Vacha, Frantisek ; Psencik, Jakub and Zigmantas, Donatas LU
(2014)
In The Journal of Physical Chemistry Letters
5(10).
p.1743-1747
- Abstract
- In green photosynthetic bacteria, the chlorosome baseplate mediates excitation energy transfer from the interior of the light-harvesting chlorosome toward the reaction centers. However, the electronic states of the baseplate remain unexplored, hindering the mechanistic understanding of the baseplate as an excitation energy collector and mediator. Here we use two-dimensional spectroscopy to study the excited state structure and internal energy relaxation in the baseplate of green sulfur bacterium Chlorobaculum tepidum. We resolved an exciton system with four energy states, indicating that the organization of the pigments in the baseplate is more complex than was thought before and constitutes at least four bacteriochlorophyll molecules in a... (More)
- In green photosynthetic bacteria, the chlorosome baseplate mediates excitation energy transfer from the interior of the light-harvesting chlorosome toward the reaction centers. However, the electronic states of the baseplate remain unexplored, hindering the mechanistic understanding of the baseplate as an excitation energy collector and mediator. Here we use two-dimensional spectroscopy to study the excited state structure and internal energy relaxation in the baseplate of green sulfur bacterium Chlorobaculum tepidum. We resolved an exciton system with four energy states, indicating that the organization of the pigments in the baseplate is more complex than was thought before and constitutes at least four bacteriochlorophyll molecules in a close contact. Based on the finding that the energy of the baseplate states is in the same range as in the adjacent Fenna-Matthews-Olson complex, we propose a "lateral" energy transfer pathway, where excitation energy can flow through the photosynthetic unit via all the states of individual complexes. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/4559080
- author
- Dostal, Jakub
LU
; Vacha, Frantisek
; Psencik, Jakub
and Zigmantas, Donatas
LU
- organization
- publishing date
- 2014
- type
- Contribution to journal
- publication status
- published
- subject
- in
- The Journal of Physical Chemistry Letters
- volume
- 5
- issue
- 10
- pages
- 1743 - 1747
- publisher
- The American Chemical Society (ACS)
- external identifiers
-
- wos:000336199000022
- scopus:84901003223
- ISSN
- 1948-7185
- DOI
- 10.1021/jz5005279
- 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
- d9296a9f-45e0-4f02-bb10-cbb9eee0ba65 (old id 4559080)
- date added to LUP
- 2016-04-01 13:14:17
- date last changed
- 2022-01-27 18:02:16
@article{d9296a9f-45e0-4f02-bb10-cbb9eee0ba65,
abstract = {{In green photosynthetic bacteria, the chlorosome baseplate mediates excitation energy transfer from the interior of the light-harvesting chlorosome toward the reaction centers. However, the electronic states of the baseplate remain unexplored, hindering the mechanistic understanding of the baseplate as an excitation energy collector and mediator. Here we use two-dimensional spectroscopy to study the excited state structure and internal energy relaxation in the baseplate of green sulfur bacterium Chlorobaculum tepidum. We resolved an exciton system with four energy states, indicating that the organization of the pigments in the baseplate is more complex than was thought before and constitutes at least four bacteriochlorophyll molecules in a close contact. Based on the finding that the energy of the baseplate states is in the same range as in the adjacent Fenna-Matthews-Olson complex, we propose a "lateral" energy transfer pathway, where excitation energy can flow through the photosynthetic unit via all the states of individual complexes.}},
author = {{Dostal, Jakub and Vacha, Frantisek and Psencik, Jakub and Zigmantas, Donatas}},
issn = {{1948-7185}},
language = {{eng}},
number = {{10}},
pages = {{1743--1747}},
publisher = {{The American Chemical Society (ACS)}},
series = {{The Journal of Physical Chemistry Letters}},
title = {{2D Electronic Spectroscopy Reveals Excitonic Structure in the Baseplate of a Chlorosome}},
url = {{https://lup.lub.lu.se/search/files/109835792/Baseplate_paper_revised_v3_si.pdf}},
doi = {{10.1021/jz5005279}},
volume = {{5}},
year = {{2014}},
}