外文题目: Excitonic and vibrational coherence in artificial photosynthetic systems studied by negative-time ultrafast laser spectroscopy
作者: Han, Dongjia; Xue, Bing; Du, Juan; Kobayashi, Takayoshi; Miyatake, Tomohiro; Tamiaki, Hitoshi; Xing, Xin; Yuan, Wei; Li, Yanyan; Leng, Yuxin
刊名: Phys. Chem. Chem. Phys.
年: 2016 卷: 18 期: 35 页： 24252--24260
英文关键词:

EXCITATION-ENERGY TRANSFER; 2-DIMENSIONAL ELECTRONIC SPECTROSCOPY; GREEN SULFUR BACTERIA; QUANTUM COHERENCE; CHLOROPHYLL-A; SUB-5-FS SPECTROSCOPY; ROOM-TEMPERATURE; RESONANCE RAMAN; SOLID-STATE; DYNAMICS
英文摘要:
Quantum coherences between excitonic states are believed to have a substantial impact on excitation energy transfer in photosynthetic systems. Here, the excitonic and vibrational coherence relaxation dynamics of artificially synthetic chlorosomes are studied by a sub 7 fs negative-time-delay laser spectroscopy at room temperature. The results provide direct evidence for the quantum coherence of the excitonic dephasing time of 23 +/- 1 fs at physiologically relevant temperatures, which is significant in the initial step of energy transfer in chlorosome or chlorosome-like photosynthetic systems. Meanwhile, coherent molecular vibrations in the excited state are also detected without the effect of wave-packet motion in the ground state, which shows that the excited state wave-packet motion contributes greatly to the vibrational modes of similar to 150 and similar to 1340 cm(-1) in artificial chlorosome systems.


文献类型: 期刊论文
正文语种: English
收录类别: SCI
DOI: 10.1039/c6cp03540j


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