Raman Spectroscopy of the Interface

Raman scattering spectrometry has some advantages over an infrared (IR) spectrometry in the sensitivity, the space resolution, and the applicability to aqueous solution. It can attain high sensitivity, when it is performed under the resonance Raman condition, or under the surface enhanced condition, where silver or gold nanoparticle is used as a source of plasmon. These techniques have been applied successfully for the measurement of extremely small amount of molecules adsorbed at the liquid-liquid interfacial region. 

The combination of resonance Raman microscope spectrometry and the CLM method allowed us to directly observe the Raman spectra of the liquid-liquid interface and the bulk phases by shifting the focal point of an objective lens. A schematic diagram of the measurement system is shown in Fig. 6. CLM/ Raman microscope spectrometry was applied in order to measure the rate of complex formation between Pd(II) and 5-Br-PADAP (HL) at the heptane-water interface and it was demonstrated that this method was highly useful for the kinetic measurement of the interfacial reaction [37], 

These results suggested that the PdLCl complex at the interface partially contacted water molecules. The solvent effect on the resonance Raman spectra 

Applications of SERS for the detection of molecules at the liquid-liquid interface have not been carried out. The liquid-liquid interface has been studied 

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