Efficient Light-Harvesting Antennae Resulting from the Dense Organization of Dyes into DNA Junctions through d-Threoninol

Hiromu Kashida, Hidenori Azuma, Ryoko Maruyama, Yasuyuki Araki, Takehiko Wada, Hiroyuki Asanuma

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)11360-11363
Number of pages4
JournalAngewandte Chemie - International Edition
Volume59
Issue number28
DOIs
Publication statusPublished - 2020 Jul 6

Keywords

  • DNA junctions
  • FRET
  • fluorophores
  • light-harvesting antennae
  • pyrene

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)

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