Light harvesting and energy transfer within coumarin-labeled polymers

被引:10
作者
Adronov, Alex [1 ]
Robello, Douglas R. [2 ]
Fréchet, Jean M. J. [1 ]
机构
[1] Department of Chemistry, 718 Latimer Hall, University of California at Berkeley, Berkeley, CA 94720, United States
[2] Eastman Kodak Company, Building 82, Rochester, NY 14650, United States
关键词
Chromophores - Copolymers - Dendrimers - Energy transfer - Fluorescence;
D O I
10.1002/pola.1113
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学科分类号
摘要
Linear copolymers that have pendant coumarin-2 and coumarin-343 chromophores were prepared as analogues to previously synthesized light-harvesting dendrimers. The chromophore ratios within these polymers were maintained similar to those of the various generation dendrimers to investigate the effect of polymer architecture on the energy-transfer efficiency between the coumarin-2 donors and coumarin-343 acceptors. Both physical and photophysical properties of these polymers were analyzed and compared to those of the analogous dendrimers. Energy-transfer efficiencies were relatively high in the polymers; however, deleterious excimer formation between the coumarin-343 chromophores diminished the quantum yield of fluorescence of the polymers when compared to the analogous dendrimers. Overall, it was found that the ultimate performance of the dendritic light-harvesting antennae was superior to that of the polymeric analogues, but the polymers were more practical in terms of synthetic accessibility.
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