Estimating pH at the air/water interface with a confocal fluorescence microscope

Haiya Yang, Yasushi Imanishi, Akira Harata

    研究成果: Contribution to journalArticle査読

    3 被引用数 (Scopus)

    抄録

    One way to determine the pH at the air/water interface with a confocal fluorescence microscope has been proposed. The relation between the pH at the air/water interface and that in a bulk solution has been formulated in connection with the adsorption equilibrium and the dissociation equilibrium of the dye adsorbed. Rhodamine B (RhB) is used as a surface-active fluorescent pH probe. The corrected fluorescence spectrum of RhB molecules at the air/water interface with the surface density of 1.0 nmol m -2 level shows pH-dependent shifts representing an acid-base equilibrium. Two ways to determine the unknown acid-base equilibrium constant of RhB molecules at the air/water interface have been discussed. With surface-tension measurements, the adsorption properties, maximum surface density, and adsorption equilibrium constants were estimated for both cationic and zwitterionic forms of RhB molecules at the air/water interface.

    本文言語英語
    ページ(範囲)1005-1010
    ページ数6
    ジャーナルanalytical sciences
    31
    10
    DOI
    出版ステータス出版済み - 2015

    All Science Journal Classification (ASJC) codes

    • 分析化学

    フィンガープリント

    「Estimating pH at the air/water interface with a confocal fluorescence microscope」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

    引用スタイル