Excitonic structure and charge separation in the heliobacterial reaction center probed by multispectral multidimensional spectroscopy.

ABSTRACT: Photochemical reaction centers are the engines that drive photosynthesis. The reaction center from heliobacteria (HbRC) has been proposed to most closely resemble the common ancestor of photosynthetic reaction centers, motivating a detailed understanding of its structure-function relationship. The recent elucidation of the HbRC crystal structure motivates advanced spectroscopic studies of its excitonic structure and charge separation mechanism. We perform multispectral two-dimensional electronic spectroscopy of the HbRC and corresponding numerical simulations, resolving the electronic structure and testing and refining recent excitonic models. Through extensive examination of the kinetic data by lifetime density analysis and global target analysis, we reveal that charge separation proceeds

SUBMITTER: Song Y 

PROVIDER: S-EPMC8121816 | biostudies-literature | 2021 May

REPOSITORIES: biostudies-literature