Electronic Structure and Dynamics of Higher-Lying Excited States in Light Harvesting Complex 1 from Rhodobacter sphaeroides.
Electronic Structure and Dynamics of Higher-Lying Excited States in Light Harvesting Complex 1 from Rhodobacter sphaeroides.
复制标题
球形红杆菌光捕获复合物 1 中高位激发态的电子结构和动力学。
DOI:
10.1021/acs.jpca.6b04146
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发表时间:
2016
期刊:
影响因子:
--
通讯作者:
Engel,GregoryS
中科院分区:
文献类型:
--
作者:
Dahlberg,PeterD;Ting,Po-Chieh;Massey,SaraC;Martin,ElizabethC;Hunter,CNeil;Engel,GregoryS
Light harvesting in photosynthetic organisms involves efficient transfer of energy from peripheral antenna complexes to core antenna complexes, and ultimately to the reaction center where charge separation drives downstream photosynthetic processes. Antenna complexes contain many strongly coupled chromophores, which complicates analysis of their electronic structure. Two-dimensional electronic spectroscopy (2DES) provides information on energetic coupling and ultrafast energy transfer dynamics, making the technique well suited for the study of photosynthetic antennae. Here, we present 2DES results on excited state properties and dynamics of a core antenna complex, light harvesting complex 1 (LH1), embedded in the photosynthetic membrane ofRhodobacter sphaeroides. The experiment reveals weakly allowed higher-lying excited states in LH1 at 770 nm, which transfer energy to the strongly allowed states at 875 nm with a lifetime of 40 fs. The presence of higher-lying excited states is in agreement with effective Hamiltonians constructed using parameters from crystal structures and atomic force microscopy (AFM) studies. The energy transfer dynamics between the higher- and lower-lying excited states agree with Redfield theory calculations.
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DOI:
10.1073/pnas.88.24.11207
发表时间:
1991
影响因子:
11.1
作者:
Shreve,AP;Cherepy,NJ;Franzen,S;Boxer,SG;Mathies,RA
通讯作者:
Mathies,RA
DOI:
--
发表时间:
2012
期刊:
影响因子:
--
作者:
Kelly A. Fransted;G. Engel
通讯作者:
G. Engel
影响因子:
11.4
作者:
Jamieson, SJ;Wang, PY;Bullough, PA
通讯作者:
Bullough, PA
影响因子:
3.4
作者:
Thomas A. Cohen Stuart;M. Vengris;V. Novoderezhkin;R. Cogdell;C. Hunter;Rienk van Grondelle
通讯作者:
Rienk van Grondelle
影响因子:
3.6
作者:
E. Harel;P. Long;G. Engel
通讯作者:
G. Engel