Linear Conjugated Systems Bearing Aromatic Terminal Groups. XII. Syntheses and Electronic Spectra of α,ω-Di-2-pyrenyl-and α,ω-Di-2-fluorenylpolyenes
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概要
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The syntheses of α,ω-di-2-pyrenyl- and α,ω-di-2-fluorenylpolyenes I<SUB>n</SUB> and I<SUB>n</SUB><SUP>′</SUP> (<I>n</I>=1–6) by means of the Wittig reaction are described. Aldehydes II, II′, propenals IV, IV′, pentadienals V, V′ bearing 2-pyrenyl or 2-fluorenyl terminal group and muconaldehyde VI were used as carbonyl components. Phosphoranes III, III′, VII, VII′, VIII and VIII′ were prepared from methyl-, propenyl-, and pentadienyltriphenylphosphonium bromides substituted with 2-pyrenyl or 2-fluorenyl group by the reaction with phenyllithium. I<SUB>n</SUB> and I<SUB>n</SUB>′ were obtained by the reaction of carbonyl components with phosphoranes by proper combination. It was found that the bathochromic shift of the longest-wavelength peaks of I<SUB>n</SUB> and I<SUB>n</SUB>′ can be expressed by the following empirical equations:<BR>& I_n:λ=44.6n^0.7+314 (nm in tetrahydrofuran)<BR>& I_n':λ=29.5n^0.8+353 (nm in tetrahyhrofuran)
- 公益社団法人 日本化学会の論文
著者
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Akiyama Shuzo
Department of Applied Physics and Chemistry, Fukui University of Technology
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Nakagawa Masazumi
Department of Chemistry Faculty of Science Osaka University
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Yasuhara Akio
Department of Chemistry, Faculty of Science, Osaka University
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Takeuchi Yasuhira
Department of Chemistry, Faculty of Science, Osaka University
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