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Vibrational and vibronic coherences in the energy transfer process of light-harvesting complex II revealed by two-dimensional electronic spectroscopy.
- Source :
- Journal of Chemical Physics; 3/28/2022, Vol. 156 Issue 12, p1-9, 9p
- Publication Year :
- 2022
-
Abstract
- The presence of quantum coherence in light-harvesting complex II (LHCII) as a mechanism to understand the efficiency of the light-harvesting function in natural photosynthetic systems is still debated due to its structural complexity and weak-amplitude coherent oscillations. Here, we revisit the coherent dynamics and clarify different types of coherences in the energy transfer processes of LHCII using a joint method of the high-S/N transient grating and two-dimensional electronic spectroscopy. We find that the electronic coherence decays completely within 50 fs at room temperature. The vibrational coherences of chlorophyll a dominate over oscillations within 1 ps, whereas a low-frequency mode of 340 cm<superscript>−1</superscript> with a vibronic mixing character may participate in vibrationally assisted energy transfer between chlorophylls a. Our results may suggest that vibronic mixing is relevant for rapid energy transfer processes among chlorophylls in LHCII. [ABSTRACT FROM AUTHOR]
- Subjects :
- ENERGY transfer
QUANTUM coherence
SPECTROMETRY
CHLOROPHYLL
Subjects
Details
- Language :
- English
- ISSN :
- 00219606
- Volume :
- 156
- Issue :
- 12
- Database :
- Complementary Index
- Journal :
- Journal of Chemical Physics
- Publication Type :
- Academic Journal
- Accession number :
- 156081233
- Full Text :
- https://doi.org/10.1063/5.0082280