Kinetic studies on intramolecular excimer formation in dinaphthylalkanes.

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概要

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• Various dinaphthylalkanes in which two naphthyl groups are separated by three carbon atoms were prepared, and intramolecular excimer formation was investigated. All rate constants in Förster's kinetics were determined by the steady state and time-resolved fluorescence measurements. A large difference in the association rate constant was observed with variation of molecular structure. The results suggest that intramolecular excimer formation is directly controlled by the rotational relaxation processes of the molecules from their neighboring conformations to the excimer conformation. A large formation rate (7.9×10<SUP>8</SUP> s<SUP>−1</SUP> at 25 °C) was observed for <I>meso</I>-2,4-dinaphthylpentane, the rate for the <I>racemo</I> isomer being found to be one tenth of that for the <I>meso</I> isomer. This indicates that the isotactic sequence in vinyl aromatic polymers plays an important role in the intramolecular excimer formation.

• 公益社団法人 日本化学会の論文

著者

• Ito Shinzaburo

  Department Of Polymer Chemistry Graduate School Of Engineering Kyoto University

• Yamamoto Masahide

  Department Of Hematology Tokyo Medical And Dental University

• Nishijima Yasunori

  Department of Chemistry Polytechnic Institute of Brooklyn

• Ito Shinzaburo

  Department of Polymer Chemistry, Kyoto University

• Yamamoto Masahide

  Department of Polymer Chemistry, Kyoto University

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