Azo-Imine Resonance in Palladium(II)−Pyridylazo Complex Adsorbed at Liquid−Liquid Interfaces Studied by Centrifugal Liquid Membrane-Resonance Raman Microprobe Spectroscopy
Azo-Imine Resonance in Palladium(II)−Pyridylazo Complex Adsorbed at Liquid−Liquid Interfaces Studied by Centrifugal Liquid Membrane-Resonance Raman Microprobe Spectroscopy
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离心液膜共振拉曼微探针光谱研究液-液界面吸附的钯(II)-吡啶偶氮配合物中的偶氮亚胺共振
DOI：
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发表时间：
2002
期刊：
影响因子：
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通讯作者：
H. Watarai
中科院分区：
文献类型：
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作者：
Akira Ohashi† and;H. Watarai
采用离心液膜共振拉曼微探针（CLM-RRMS）技术研究了钯（II）-2-（5-溴-2-吡啶偶氮）-5-二乙氨基酚氯化物（PdLCl）配合物在液-液界面上的共振拉曼光谱. CLM-RRMS测量界面和体相中PdLCl的单独共振拉曼光谱。吸附在庚烷/水和甲苯/水界面上的PdLCl的拉曼位移与介电常数较低的甲苯和氯仿中的拉曼位移不一致，而与介电常数较高的醇水混合溶剂中的拉曼位移接近。随着溶剂介电常数的增加，偶氮和亚胺谱带的强度比减小。溶剂效应对PdLCl电子光谱的影响也支持这种关系。界面拉曼光谱中的偶氮亚胺强度比表明，在水相的强烈影响下，PdLCl在甲苯/水和庚烷/水界面上存在。
The resonance Raman spectra of palladium(II)−2-(5-bromo-2-pyridylazo)-5-diethylaminophenol chloride complex (PdLCl) adsorbed at liquid−liquid interfaces were studied by a centrifugal liquid membrane-resonance Raman microprobe spectroscopy (CLM-RRMS). CLM-RRMS measures the individual resonance Raman spectra of PdLCl at the interface and in the bulk phases. The Raman shifts of PdLCl adsorbed at the heptane/water and toluene/water interfaces were not in agreement with those in toluene and chloroform of lower dielectric constants, but close to those in aqueous alcohol mixed solvents of higher dielectric constants. The intensity ratios of the azo and imine bands decreased with the increase in the dielectric constants of solvents. Solvent effect on the electronic spectra of PdLCl also supported this relationship. The azo-imine intensity ratio in the interfacial Raman spectra suggested that the ligand of PdLCl at the toluene/water and heptane/water interfaces exists under the strong influence of aqueous phase wi...