Micellar Counterion Binding for Alkylpyridinium Iodides Probed by N-Sulfopropylacridinium Fluorescence Quenching

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Fluorescence quenching using N-sulfopropylacridinium (SPA) makes it possible to determine the degree of micellar counterion binding (β) of alkylpyridinium iodide in aqueous solution. But with quinoline derivatives as a halide-sensitive fluorescence probe, this was not possible. Fluorescence was quenched by iodide ions as indicated by linear Stern-Volmer plots, the slope of which was noted to decrease beyond cmc owing to micellar counterion binding with SPA excitation at 416 nm. The slope was found to significantly increase beyond cmc with SPA excitation at 357 nm. The abrupt quenching was due to absorption bands resulting from charge-transfer interactions of pyridinium and iodide ions. SPA fluorescence was quenched by iodide and bromide ions but virtually unaffected by nitrate or sulfate ions. Selective counterion binding of iodide ions is thus shown to be detectable.<br>

収録刊行物

  • Journal of oleo science

    Journal of oleo science 53(9), 445-451, 2004-09-01

    公益社団法人 日本油化学会

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各種コード

  • NII論文ID(NAID)
    10013445703
  • NII書誌ID(NCID)
    AA11503337
  • 本文言語コード
    ENG
  • 資料種別
    ART
  • ISSN
    13473352
  • NDL 記事登録ID
    7040954
  • NDL 雑誌分類
    ZP25(科学技術--化学・化学工業--油脂類)
  • NDL 請求記号
    Z54-J571
  • データ提供元
    CJP書誌  NDL  J-STAGE 
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