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A semisynthetic peptide-metalloporphyrin responsive matrix for artificial photosynthesis

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Item Type:Article
Title:A semisynthetic peptide-metalloporphyrin responsive matrix for artificial photosynthesis
Creators Name:Sun, Z. and Diebolder, C.A. and Renault, L. and de Groot, H.
Abstract:The CsmA protein from the baseplate of the Chlorobaculum tepidum is proposed as an attractive motif for the engineering of semisynthetic materials for artificial photosynthesis. We perform self-assembly of zinc protoporphyrin IX (ZnPP) with a truncated CsmA (tCsmA) amphipathic peptide scaffold for the bottom-up construction of a semisynthetic matrix for energy transfer. The resulting self-assembly shows an extended periodic structure with 7(2) helical symmetry. The complex is able to maintain a good photostability for at least 30 min when the concentration is more than 20 μM, and almost 100 % harvested energy can be transferred to the acceptor cation radical methyl viologen (MV(+)). The excitation-energy transfer rate of the complex was increased from the ns(−1) scale to the ps(−1) scale that is comparable to natural light-harvesting antenna systems. It contributes to converging evidence that chiral responsive matrix assemblies can be developed for efficient light energy harvesting in artificial photosynthesis.
Keywords:Artificial Photosynthesis, Chirality, Exciton Energy Transfer, Self-Assembly, Semisynthetic Matrices
Source:ChemPhotoChem
ISSN:2367-0932
Publisher:Wiley
Volume:3
Number:8
Page Range:630-635
Date:August 2019
Official Publication:https://doi.org/10.1002/cptc.201900063

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