Uncovering dark multichromophoric states in Peridinin-Chlorophyll-Protein.

ABSTRACT: It has long been recognized that visible light harvesting in Peridinin-Chlorophyll-Protein is driven by the interplay between the bright (S₂) and dark (S₁) states of peridinin (carotenoid), along with the lowest-lying bright (Q_y) and dark (Q_x) states of chlorophyll-a. Here, we analyse a chromophore cluster in the crystal structure of Peridinin-Chlorophyll-Protein, in particular, a peridinin-peridinin and a peridinin-chlorophyll-a dimer, and present quantum chemical evidence for excited states that exist beyond the confines of single peridinin and chlorophyll chromophores. These dark multichromophoric states, emanating from the intermolecular packing native to Peridinin-Chlorophyll-Protein, include a correlated triplet pair comprisin

SUBMITTER: Taffet EJ 

PROVIDER: S-EPMC7115236 | biostudies-literature | 2020 Mar

REPOSITORIES: biostudies-literature