The characterization of species in aqueous solutions has presented a challenge to analytical and physical chemist, because the IR absorption of the aqueous solvent is so intense that it becomes difficult to observe the solute in the water by IR absorption. In contrast, Raman spectrum of the solute is unaffected by the water, so the weak scattering of water makes the technique well suited to aqueous samples, and the Raman spectrum exhibits well-defined bands corresponding to fundamental modes of vibration. In addition, Raman spectroscopy has some inherent advantages in aqueous solution analysis...
