Highly Branched Polymers with Layered Structures that Mimic Light-Harvesting Processes

Angewandte Chemie
Yi ShiHaifeng Gao

Abstract

Hyperbranched polymers (HBPs) with decorated donor and acceptor chromophores in different domains were constructed to demonstrate the function of light harvesting in a polymeric nanostructure. Taking advantage of our recently developed chain-growth copper-catalyzed azide-alkyne cycloaddition polymerization, two structural parameters in the HBPs, for example, the molar ratio of the acceptor Coumarin 343 in the core to the donor Coumarin 2 on the periphery, and the average distance between these two layers, could be independently varied in a one-pot synthesis. The results demonstrated an efficient energy transfer from the excited Coumarin 2 to the ground-state Coumarin 343 in the core, with the efficiency of the energy transfer reaching as high as 98 %. The excited Coumarin 343, after receiving energy from donor Coumarin 2 emitted higher fluorescence intensity than when directly excited, indicating an observed light concentration effect from the periphery dye to the central dye in one polymer structure.

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Citations

Aug 10, 2018·Macromolecular Rapid Communications·Yuwan YangBien Tan
May 6, 2020·Wiley Interdisciplinary Reviews. Nanomedicine and Nanobiotechnology·Timothy Cuneo, Haifeng Gao
Sep 4, 2019·Journal of the American Chemical Society·Koushik AcharyyaPeter J Stang
Apr 23, 2019·Journal of the American Chemical Society·Xu ZhouHao Yan
Jan 16, 2021·Journal of the American Chemical Society·Dengqing ZhangTao Yi

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