Effect of π-system on long-range photoinduced electron transfer in through-ring α-cyclodextrin complexes of carbazole-viologen linked compounds

Hiroaki Yonemura, Shingo Kusano, Taku Matsuo, Sunao Yamada

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Carbazole-viologen linked compounds, with long spacers (ca. 2 nm), were incorporated into two α-cyclodextrins to afford rotaxane type complexes. In the presence of a biphenyl unit in the spacer, the fluorescence lifetime of the carbazole moiety was reduced by 2 ns as compared with the case with a simple alkyl spacer (τ = 12 ns). Contribution of the superexchange mechanism to long-range electron transfer from the carbazole to the viologen moiety was suggested.

Original languageEnglish
Pages (from-to)6915-6918
Number of pages4
JournalTetrahedron Letters
Issue number38
Publication statusPublished - Sep 17 1998


All Science Journal Classification (ASJC) codes

  • Biochemistry
  • Drug Discovery
  • Organic Chemistry

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