Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 59, Issue 28, Pages 11360-11363Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.202004221
Keywords
DNA junctions; fluorophores; FRET; light-harvesting antennae; pyrene
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Funding
- JSPS KAKENHI [JP18H03933, JP16H05925, JP17H05150, JP19K22250]
- AMED [19am0401007]
- NJRC Mater. Dev [20191116, 20193009]
- Asahi Glass Foundation
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Herein we report the construction of efficient light-harvesting antennae by hybridization of DNA oligonucleotides containing high densities of fluorophores into DNA junctions through d-threoninol. Six pyrene donors could be incorporated into each arm without self-quenching. A perylene acceptor was located at the center of the junction. Antenna effects of a duplex and three- to eight-way junctions were systematically compared. Six- and eight-way junctions had the highest antenna effects, and their effective absorption coefficients were 8.5 times higher than that of perylene. Interestingly, even-numbered junctions had higher efficiencies than odd-numbered junctions. Nondenaturing gel analyses and fluorescence lifetime measurements demonstrated that the strong odd-even effects were derived from differences in the stability of junctions. The results presented will guide the design of efficient artificial photosynthetic systems.
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