Features of Phenolsulfonphthalein and Phenolphthalein Substituted at All Ortho-Positions of Phenols with Bromine

この論文にアクセスする

この論文をさがす

著者

抄録

The influence of bromination at all the ortho-positions of phenols on the features of phenolsulfonphtalein and phenolphtalein was investigated. The absorption spectra of Bromphenol Blue (H2BPS) in phosphate buffers demonstrated the complete opening of the lactone ring to form yellow HBPS- at pH 1 where pK2=3.8. The reaction of hydroxide ion with blue BPS2- was found to produce colorless BPS(OH)3- required heating where pK3=9. On the contrary, the spectra of 3′,3″,5′,5″-tetrabromophenolphtalein (H2BPP) demonstrated that the lactone ring was very stable. More than 99.5% of BPP2- species consisted of a colorless lactone possessing two isolated phenol groups where pK1′=6.0 and pK2′=6.8; the reaction of hydroxide ion with BPP2- to produce BPP(OH)3- was slow where pK3=10.3. These results indicate the increased acidity of phenols and the greater tendency of the central carbon atom to act as an electron acceptor.

収録刊行物

  • Analytical sciences : the international journal of the Japan Society for Analytical Chemistry

    Analytical sciences : the international journal of the Japan Society for Analytical Chemistry 15(4), 339-342, 1999-04

    社団法人 日本分析化学会

参考文献:  3件中 1-3件 を表示

  • <no title>

    YAMAGUCHI K.

    Anal. Sci. 13, 521, 1997

    被引用文献3件

  • <no title>

    TAMURA Z.

    Anal. Sci. 12, 927, 1997

    被引用文献1件

  • <no title>

    YAMAGUCHI K.

    Anal. Sci. 13, 1057, 1997

    被引用文献1件

被引用文献:  1件中 1-1件 を表示

各種コード

  • NII論文ID(NAID)
    10002419357
  • NII書誌ID(NCID)
    AA10500785
  • 本文言語コード
    ENG
  • 資料種別
    ART
  • ISSN
    09106340
  • NDL 記事登録ID
    4712328
  • NDL 雑誌分類
    ZP4(科学技術--化学・化学工業--分析化学)
  • NDL 請求記号
    Z54-F482
  • データ提供元
    CJP書誌  CJP引用  NDL  J-STAGE 
ページトップへ