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

Haiya Yang, Yasushi Imanishi, Akira Harata

    研究成果: ジャーナルへの寄稿記事

    3 引用 (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.

    元の言語英語
    ページ(範囲)1005-1010
    ページ数6
    ジャーナルanalytical sciences
    31
    発行部数10
    DOI
    出版物ステータス出版済み - 1 1 2015

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    rhodamine B
    Microscopes
    Fluorescence
    Water
    Air
    Equilibrium constants
    Adsorption
    Molecules
    Surface tension
    Coloring Agents

    All Science Journal Classification (ASJC) codes

    • Analytical Chemistry

    これを引用

    Estimating pH at the air/water interface with a confocal fluorescence microscope. / Yang, Haiya; Imanishi, Yasushi; Harata, Akira.

    :: analytical sciences, 巻 31, 番号 10, 01.01.2015, p. 1005-1010.

    研究成果: ジャーナルへの寄稿記事

    Yang, Haiya ; Imanishi, Yasushi ; Harata, Akira. / Estimating pH at the air/water interface with a confocal fluorescence microscope. :: analytical sciences. 2015 ; 巻 31, 番号 10. pp. 1005-1010.
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