Acidity effects on the fluorescence properties and adsorptive behavior of rhodamine 6G molecules at the air-water interface studied with confocal fluorescence microscopy

Xue Ying Zheng, Mika Wachi, Akira Harata, Yoshihiko Hatano

    研究成果: Contribution to journalArticle査読

    14 被引用数 (Scopus)

    抄録

    The effects of acidity on fluorescence originated from rhodamine 6G (R6G) molecules adsorbed at the air-water interface of extremely low-concentration aqueous solutions have been studied with confocal fluorescence microscopy. Similarities and differences in the observed acidity effects between R6G molecules at the interface and those in the bulk solution have been discussed. With increasing the subphase-pH from 1 to 6, height and frequency of photon bursts as well as intensity of the interface-originated fluorescence change in two steps, while bulk fluorescence changes in one step and a little change in the number of adsorbed R6G molecules is verified with surface tension measurements. The results suggest that there is an interface-specific equilibrium among the chemical forms of R6G molecules. Chemical forms contributing to the interface-originated fluorescence above pH 5 are discussed.

    本文言語英語
    ページ(範囲)1085-1090
    ページ数6
    ジャーナルSpectrochimica Acta - Part A: Molecular and Biomolecular Spectroscopy
    60
    5
    DOI
    出版ステータス出版済み - 4 2004

    All Science Journal Classification (ASJC) codes

    • 分析化学
    • 原子分子物理学および光学
    • 器械工学
    • 分光学

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