Coherence and population dynamics of chlorophyll excitations in FCP complex: Two-dimensional spectroscopy study.
作者： Andrius Gelzinis , Darius Abramavicius , Claudia Büchel , RamÅ«nas Augulis , Vytautas Butkus
DOI: 10.1063/1.4914098
关键词: Femtosecond 、 Electron spectroscopy 、 Chlorophyll c 、 Chemistry 、 Analytical chemistry 、 Picosecond 、 Chemical physics 、 Spectroscopy 、 Population 、 Coherence (physics) 、 Chlorophyll
摘要: Energy transfer processes and coherent phenomena in the fucoxanthin-chlorophyll protein complex, which is responsible for light harvesting function marine algae diatoms, were investigated at 77 K by using two-dimensional electronic spectroscopy. Experiments performed on femtosecond picosecond timescales led to separation of spectral dynamics, witnessing evolutions coherence population states system region Qy transitions chlorophylls a c. Analysis dynamics allowed us identify chlorophyll (Chl) fucoxanthin intramolecular vibrations dominating over first few picoseconds. Closer inspection transition Chl c revealed previously not identified, mutually non-interacting participating or energy molecules. Consideration separated incoherent hypothesize vibrations-assisted between overall spatial arrangement
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