Diffuse Reflection Spectra of Filter Papers Dyed with 1-Arylazo-2-naphthols
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概要
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The diffuse reflection spectra of filter papers dyed with sixteen 1-arylazo-2-naphthols were examined in the range from 350 to 700 mμ. The absorption bands due to both the azo and hydrazone tautomers were observed in this state. Appreciable changes in the hue of the dyed papers caused by moisture were attributed to the deviation from the Kubelka-Munk theory due to the increased regular reflection; however, the movement of the tautomeric equilibrium caused by moisture was also clearly demonstrated in many cases. The direction was found to depend upon the kind and position of the substituents, <I>e.g.</I>, towards the azo tautomer in the case of the <I>p</I>-Cl and <I>o</I>-NO<SUB>2</SUB> derivatives and towards the hydrazone tautomer in the case of the <I>m</I>-Cl and <I>o</I>-MeO derivatives.
- 公益社団法人 日本化学会の論文
著者
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Matsunaga Yoshio
Department of Chemistry, Faculty of Science, Hokkaido University
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Miyajima Nobuhiko
Department of Chemistry, Faculty of Science, Hokkaido University
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