A DNA-Directed Light-Harvesting/Reaction Center System
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- 作者：Palash K. Dutta ; Symon Levenberg ; Andrey Loskutov ; Daniel Jun ; Rafael Saer ; J. Thomas Beatty ; Su Lin ; Yan Liu ; Neal W. Woodbury ; Hao Yan
- 刊名：Journal of the American Chemical Society
- 出版年：2014
- 出版时间：November 26, 2014
- 年：2014
- 卷：136
- 期：47
- 页码：16618-16625
- 全文大小：504K
- ISSN：1520-5126
文摘
A structurally and compositionally well-defined and spectrally tunable artificial light-harvesting system has been constructed in which multiple organic dyes attached to a three-arm-DNA nanostructure serve as an antenna conjugated to a photosynthetic reaction center isolated from Rhodobacter sphaeroides 2.4.1. The light energy absorbed by the dye molecules is transferred to the reaction center, where charge separation takes place. The average number of DNA three-arm junctions per reaction center was tuned from 0.75 to 2.35. This DNA-templated multichromophore system serves as a modular light-harvesting antenna that is capable of being optimized for its spectral properties, energy transfer efficiency, and photostability, allowing one to adjust both the size and spectrum of the resulting structures. This may serve as a useful test bed for developing nanostructured photonic systems.