Delayed excimer fluorescence of acridine orange bound to DNA.

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概要

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• The temperature dependence of long-lived emissions of Acridine Orange bound to DNA has been investigated. Only phosphorescence with a maximum close to 620 nm is observed in the range 77—<I>ca.</I> 150 K. With a rise in temperature, the delayed thermal fluorescence around 530 nm is observed in addition to phosphorescence at a high ratio of DNA phosphate to dye (<I>P</I>⁄<I>D</I>). With a decrease in <I>P</I>⁄<I>D</I> value, the delayed thermal fluorescence is replaced by a new delayed emission band around 640 nm. Its maximum wavelength is very close to that of dimer fluorescence of Acridine Orange in water. It has been shown that the emission results from two processes: (1) thermal excitation of the triplet state of the dimer to the excimer state and (2) excimer formation after the thermal excitation of the triplet state of the monomer to the first excited singlet state.

• 公益社団法人 日本化学会の論文

著者

• Kubota Yukio

  Department Of Chemistry And Chemical Engineering Yamagata University

• Motoda Yuko

  Department of Chemistry, Faculty of Science, Yamaguchi University

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