Spectroelectrochemical Studies of Ru(bpy)32+ at the Water/1,2-Dichloroethane Interface
Spectroelectrochemical Studies of Ru(bpy)32+ at the Water/1,2-Dichloroethane Interface
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Ru(bpy)32 在水/1,2-二氯乙烷界面处的光谱电化学研究
DOI：
10.1021/jp9535452
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发表时间：
1996
期刊：
影响因子：
--
通讯作者：
H. Girault
中科院分区：
文献类型：
--
作者：
Z. Ding;R. G. Wellington;P. Brevet;H. Girault
用全内反射几何中的微分循环伏安荧光法研究了Ru(Bpy)32+在水/1，2-二氯乙烷(DCE)界面上的迁移。还测量了Ru(Bpy)32+在体水、体相DCE和水/DCE界面不同外加电位下的发射光谱。这两种技术都可以区分水中的Ru(Bpy)32+和DCE中的Ru(Bpy)32+。同时，用时间分辨发光光谱研究了TCNQ对TIR几何构型辐照的Ru(Bpy)32+水溶液在水/DCE界面上激发态的猝灭作用。然后在外加界面电位下进行电化学控制实验，通过与同一实验中测量的伏安荧光图直接比较，唯一可观察到的猝灭被归因于Ru(Bpy)32+转移到DCE相。在Ru(Bpy)32+主要存在的外加电位下，Ru(Bpy)32+的电势最大。
The application of differential cyclic voltfluorometry in total internal reflection (TIR) geometry to the study of Ru(bpy)32+ transfer at the water/1,2-dichloroethane (DCE) interface has been studied. The emission spectra of Ru(bpy)32+ in bulk water, in bulk DCE, and at various applied potentials at the water/DCE interface have also been measured. Both techniques allow discrimination between Ru(bpy)32+ in water and Ru(bpy)32+ in DCE. Also, the quenching of the excited state of aqueous Ru(bpy)32+, irradiated in TIR geometry, at the water/DCE interface by tetracyanoquinodimethane (TCNQ), dissolved in the adjacent organic phase, has been studied using time-resolved luminescence spectroscopy. Electrochemically controlled experiments were then conducted at applied interfacial potentials, and the only quenching observable was attributed to the transfer of Ru(bpy)32+ into the DCE phase by direct comparison with the voltfluorogram measured during the same experiment. At applied potentials where Ru(bpy)32+ was mai...