Direct Observation of Energy Detrapping in LH1-RC Complex by Two-Dimensional Electronic Spectroscopy

Fei Ma, Long-Jiang Yu, Ruud Hendrikx, Zheng-Yu Wang-Otomo, Rienk van Grondelle

Research output: Contribution to JournalArticleAcademicpeer-review


The purple bacterial core light harvesting antenna-reaction center (LH1-RC) complex is the simplest system able to achieve the entire primary function of photosynthesis. During the past decade, a variety of photosynthetic proteins were studied by a powerful technique, two-dimensional electronic spectroscopy (2DES). However, little attention has been paid to LH1-RC, although its reversible uphill energy transfer, trapping, and backward detrapping processes, represent a crucial step in the early photosynthetic reaction dynamics. Thus, in this work, we employed 2DES to study two LH1-RC complexes of Thermochromatium (Tch.) tepidum. By direct observation of detrapping, the complex reversible process was clearly identified and an overall scheme of the excitation evolution in LH1-RC was obtained.
Original languageEnglish
Pages (from-to)591-594
Number of pages4
JournalJournal of the American Chemical Society
Issue number2
Publication statusPublished - 18 Jan 2017

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