Extracting single and two-exciton couplings in photosynthetic complexes by coherent two-dimensional electronic spectra.

Extracting single and two-exciton couplings in photosynthetic complexes by coherent two-dimensional electronic spectra.
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DOI:
10.1016/j.chemphys.2008.10.010
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发表时间:
2008-08-22
期刊:
影响因子:
2.3
通讯作者:
Mukamel S
Mukamel S
中科院分区:
化学3区
文献类型:
--
作者:
Abramavicius D;Palmieri B;Mukamel S

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“强”J和“弱”K激子耦合的FMO光合复合物的非线性飞秒光学响应的签名被确定。这两种耦合分别来源于分子基态和激发态的过渡电荷偶极子和分子永久偶极子的相互作用。我们证明,通过结合各种二维光信号,它应该是可以反演光谱数据,以重建完整的激子哈密顿量(能量和耦合)。
Signatures of “strong” J and “weak” K exciton couplings in the nonlinear femtosecond optical response of the FMO photosynthetic complex are identified. The two types of couplings originate from interactions of molecular transition charge dipoles and change of molecular permanent dipoles in their ground and excited states, respectively. We demonstrate that by combining various two-dimensional optical signals it should be possible to invert spectroscopic data to reconstruct the full exciton Hamiltonian (energies and couplings).
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