Synthesis and Absorption Spectra of Triarylmethane Dyes Containing a Heterocyclic Ring (II)

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  • 複素環を有する新規なトリアリールメタン系色素の合成と吸収スペクトル (第II報)
  • 複素環を有する新規なトリアリールメタン系色素の合成と吸収スペクトルー2-
  • フクソカン オ ユウスル シンキ ナ トリアリールメタンケイ シキソ ノ ゴウ

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Abstract

Some triarylmethane dyes containing a heterocyclic ring were prepared to examine the effect of a heterocyclic ring on the absorption spectra of triphenylmethane dyes. Comparison of Malachite Green and triarylmethane dyes containing a heterocyclic ring shows that replacement of a phenyl group in Malachite Green with a heterocyclic ring as a benzopyran or a pyridine causes a bathochromic shift of λmax.<BR>The Resonance Raman technique was applied to the triarylmethane dye containing a pyridine ring, and typical “x-band” and “y-band” of the triphenylmethane dye in the absorption spectra were assigned.<BR>The PPP-MO calculation shows that the longest-wavelength of the triarylmethane dye containing a 1, 4-naphthoquinone or anthraquinone is shifted to the near-infrared region.<BR>It was found that the quantum yield for decomposition of triarylmethane containing a benzothiopyran ring by irradiation of the UV light was larger than that of triphenylmethane in ethanol, but oppositely in chloroform it was smaller.<BR>The steric effect of the methyl substituted triphenylmethane was interpreted by the MM 2 calculations

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