Adsorption Behavior of Charged Zinc Porphyrins at the Water/1,2-Dichloroethane Interface Studied by Potential Modulated Fluorescence Spectroscopy
Adsorption Behavior of Charged Zinc Porphyrins at the Water/1,2-Dichloroethane Interface Studied by Potential Modulated Fluorescence Spectroscopy
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电位调制荧光光谱研究带电锌卟啉在水/1,2-二氯乙烷界面的吸附行为
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发表时间：
2000
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影响因子：
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通讯作者：
H. Girault
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作者：
H. Nagatani;R. Iglesias;D. Fermín;P. Brevet;H. Girault
采用全内反射电位调制荧光光谱法研究了离子型荧光染料在极化水/1，2-二氯乙烷界面上的吸附特性。与调制的离子染料的界面浓度的频率依赖性的荧光分析被证明是一个相当敏感的方法分离的界面现象从批量响应。PMF和电化学技术的组合允许揭示三（2，2 '-联吡啶基）钌（II）（Ru（bpy）32+）、meso-四（N-甲基吡啶基）卟啉合锌（II）（ZnTMPyP 4+）和meso-四（对磺酸基苯基）卟啉合锌（II）（ZnTPPS 4-）的特定界面相互作用的差异。当Ru（bpy）32+表现出准可逆的离子转移特性时，锌卟啉在接近离子转移范围的电位下表现出吸附特性.阴离子ZnTPPS 4-似乎是吸附在界面上的电位比正式的转移电位更积极。
The adsorption properties of ionic fluorescent dyes at the polarized water/1,2-dichloroethane interface were studied by potential modulated fluorescence (PMF) spectroscopy under total internal reflection. Analysis of the frequency-dependent fluorescence associated with modulation of the interfacial concentration of the ionic dyes proved to be a rather sensitive approach for separating interfacial phenomena from bulk responses. The combination of PMF and electrochemical techniques allows to uncover differences in the specific interfacial interactions of tris(2,2‘-bipyridyl)ruthenium(II) (Ru(bpy)32+), meso-tetrakis(N-methylpyridyl)porphyrinato zinc(II) (ZnTMPyP4+), and meso-tetrakis(p-sulfonatophenyl)porphyrinato zinc(II) (ZnTPPS4-). While Ru(bpy)32+ shows quasi-reversible ion transfer features, the charged zinc porphyrins exhibit adsorption properties at potential close to the transfer range. The anionic ZnTPPS4- appears to be adsorbed at the interface at potentials more positive than the formal transfer p...