期刊
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
卷 55, 期 8, 页码 2759-2763出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201510503
关键词
chlorosomes; exciton migration; light harvesting; nanostructures; self-assembly
资金
- 973 program [2013CB834800, 2013CB933800]
- National Natural Science Foundation of China [21525206, 21222210, 21472202]
- Fundamental Research Funds for the Central Universities
- Beijing Municipal Commission of Education
- NSFC [21272243]
We report the first highly efficient artificial light-harvesting systems based on nanocrystals of difluoroboron chromophores to mimic the chlorosomes, one of the most efficient light-harvesting systems found in green photosynthetic bacteria. Uniform nanocrystals with controlled donor/acceptor ratios were prepared by simple coassembly of the donors and acceptors in water. The light-harvesting system funneled the excitation energy collected by a thousand donor chromophores to a single acceptor. The well-defined spatial organization of individual chromophores in the nanocrystals enabled an energy transfer efficiency of 95%, even at a donor/acceptor ratio as high as 1000: 1, and a significant fluorescence of the acceptor was observed up to donor/acceptor ratios of 200 000: 1.
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