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Femtosecond anisotropy excitation spectroscopy to disentangle the Qx and Qy absorption in chlorophyll a† † Electronic supplementary information (ESI) available. See DOI: https://doi.org/10.1039/d2sc03538c


ABSTRACT: Chlorophyll a (Chl a) belongs to the most important and most investigated molecules in the field of photosynthesis. The Q-band absorption is central for energy transfer in photosystems and the relative orientation of the Qy transitions of interacting chlorophylls governs the energy transfer. Chl a was well investigated, but a quantitative separation of Qx and Qy contributions to the Q-band of the Chl a absorption spectrum is still missing. We use femtosecond Vis-pump – IR-probe anisotropy excitation spectroscopy to disentangle the overlapping electronic Qx and Qy contributions quantitatively. In an anisotropy excitation spectrum we trace the dichroic ratio of a single vibration, i.e. the keto C

SUBMITTER: Zahn C 

PROVIDER: S-EPMC9629125 | biostudies-literature | 2022 Oct

REPOSITORIES: biostudies-literature

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