文章基本信息

标题：Electronic resonance with anticorrelated pigment vibrations drives photosynthetic energy transfer outside the adiabatic framework
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作者：Vivek Tiwari ; William K. Peters ; David M. Jonas 等
期刊名称：Proceedings of the National Academy of Sciences
印刷版ISSN：0027-8424
电子版ISSN：1091-6490
出版年度：2013
卷号：110
期号：4
页码：1203-1208
DOI：10.1073/pnas.1211157110
语种：English
出版社：The National Academy of Sciences of the United States of America
摘要：The delocalized, anticorrelated component of pigment vibrations can drive nonadiabatic electronic energy transfer in photosynthetic light-harvesting antennas. In femtosecond experiments, this energy transfer mechanism leads to excitation of delocalized, anticorrelated vibrational wavepackets on the ground electronic state that exhibit not only 2D spectroscopic signatures attributed to electronic coherence and oscillatory quantum energy transport but also a cross-peak asymmetry not previously explained by theory. A number of antennas have electronic energy gaps matching a pigment vibrational frequency with a small vibrational coordinate change on electronic excitation. Such photosynthetic energy transfer steps resemble molecular internal conversion through a nested intermolecular funnel.
关键词：2D spectroscopy ; exciton ; Förster resonance energy transfer