Key Laboratory of Radiopharmaceuticals, Ministry of Education, College of Chemistry, Beijing Normal University, Beijing, 100875, China.
Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, 100190, China.
Angew Chem Int Ed Engl. 2016 Feb 18;55(8):2759-63. doi: 10.1002/anie.201510503. Epub 2016 Jan 22.
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.
我们报告了第一个基于二氟硼发色团纳米晶体的高效人工光捕获系统，以模拟叶绿素体，这是在绿色光合细菌中发现的最有效的光捕获系统之一。通过在水中简单地共组装供体和受体，制备了具有受控供体/受体比的均匀纳米晶体。光捕获系统将一千个供体发色团收集的激发能传递到一个受体上。纳米晶体中单个发色团的明确定义的空间组织使得能量转移效率达到 95%，即使在供体/受体比高达 1000:1 的情况下也是如此，并且在供体/受体比高达 2000000:1 的情况下仍观察到受体的显著荧光。
