Windowless cell for fourier transform Raman spectra of liquids and aqueous solutions

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Abstract
Fourier transform (FT) Raman spectra were obtained for water and aqueous solutions in a stainless‐steel, windowless, liquid captive cell of simple design. It was demonstrated that high‐quality Raman spectra in the low‐wavenumber region (down to 100 cm−1) can be obtained from highly colored samples without the presence of interfering bands from the usual sample containers made of glass or plastic. Raman bands at 520 and 232 cm−1 due to the symmetric stretching modes of the Cr‐O vibration of the Cr(H2O) and the Cr‐Cl vibration of the CrCl complexes were observed for very dark samples that are not amenable to conventional Raman techniques. FT‐Raman studies of aqueous Cr(III) solutions can provide valuable information on the slow ligand exchange rates.