TY - JOUR
T1 - Dynamics of Excitation Energy Transfer between the Subunits of Photosystem II Dimer
AU - Yoneda, Yusuke
AU - Katayama, Tetsuro
AU - Nagasawa, Yutaka
AU - Miyasaka, Hiroshi
AU - Umena, Yasufumi
N1 - Funding Information:
The Interactive Materials Science Cadet (IMSC) program. This work was also supported by JSPS KAKENHI Grant Number 26107002 in Scientific Research on Innovative Areas Photosynergetics. The authors thank Prof. Shigeichi Kumazaki (Kyoto University) for helpful discussion and comments.
Publisher Copyright:
© 2016 American Chemical Society.
Copyright:
Copyright 2017 Elsevier B.V., All rights reserved.
PY - 2016/9/14
Y1 - 2016/9/14
N2 - Energy transfer dynamics in monomer and dimer of the photosystem II core complex (PSII-CC) was investigated by means of femtosecond transient absorption (TA) spectroscopy. There is no profound difference between the TA dynamics of the monomer and the dimer in the weak excitation intensity condition (≤21 nJ). However, the fast recovery of the ground state bleach was pronounced at higher excitation intensities, and the excitation intensity dependence of the dimer was more significant than that of the monomer. This result indicates efficient exciton-exciton annihilation taking place in the dimer due to energy transfer between the two monomer units. The annihilation dynamics was reproduced by a simple model based on binomial theorem, which indicated that although PSII-CC dimer has two reaction centers, only one charge-separated state remained after annihilation.
AB - Energy transfer dynamics in monomer and dimer of the photosystem II core complex (PSII-CC) was investigated by means of femtosecond transient absorption (TA) spectroscopy. There is no profound difference between the TA dynamics of the monomer and the dimer in the weak excitation intensity condition (≤21 nJ). However, the fast recovery of the ground state bleach was pronounced at higher excitation intensities, and the excitation intensity dependence of the dimer was more significant than that of the monomer. This result indicates efficient exciton-exciton annihilation taking place in the dimer due to energy transfer between the two monomer units. The annihilation dynamics was reproduced by a simple model based on binomial theorem, which indicated that although PSII-CC dimer has two reaction centers, only one charge-separated state remained after annihilation.
UR - http://www.scopus.com/inward/record.url?scp=84987791191&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84987791191&partnerID=8YFLogxK
U2 - 10.1021/jacs.6b04316
DO - 10.1021/jacs.6b04316
M3 - Article
AN - SCOPUS:84987791191
VL - 138
SP - 11599
EP - 11605
JO - Journal of the American Chemical Society
JF - Journal of the American Chemical Society
SN - 0002-7863
IS - 36
ER -