Linear Conjugated Systems Bearing Aromatic Terminal Groups. VIII. Syntheses and Electronic Spectra of Bis(4-biphenylyl)- and 2,2′-Difluorenylpoly-ynes

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概要

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• In order to get further information on the effect of terminal groups on the spectral regularity of diarylpoly-ynes, we carried out the syntheses of bis(4-biphenylyl)poly-ynes (I<I><SUB>n</SUB></I>, <I>n</I>=1–6) and 2,2′-difluorenylpoly-ynes (II<I><SUB>n</SUB></I>, <I>n</I>=1–4 and 6). The bathochromic shift of the longest-wavelength absorption maxima (λ<I><SUB>L</SUB></I>) along with the increase in <I>n</I> was found to be expressed by the following empirical formulas:<BR>I<I><SUB>n</SUB></I>:λ<I><SUB>L</SUB></I>=24.0<I>n</I><SUP>1.1</SUP>+304 (nm in tetrahydrofuran)<BR>II<I><SUB>n</SUB></I>:λ<I><SUB>L</SUB></I>=9.0<I>n</I><SUP>1.5</SUP>+350 (nm in tetrahydrofuran)<BR>The spectral behavior of bis(4-biphenylyl)poly-ynes (I<I><SUB>n</SUB></I>) strongly supported the relationship λ<I><SUB>L</SUB></I>∝<I>n</I> in diphenylpoly-ynes.

• 公益社団法人 日本化学会の論文

著者

• Akiyama Shuzo

  Department of Applied Physics and Chemistry, Fukui University of Technology

• Nakasuji Kazuhiro

  Department Of Chemistry Graduate School Of Science Osaka University

• Nakagawa Masazumi

  Department of Chemistry Faculty of Science Osaka University

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