A Method for Eliminating Resonance Fluorescence Effects in Raman Studies of Some High Temperature Vapors: Raman Spectra of BiCl3 from 450 to 800°C
The applicability of laser-Raman spectroscopy to the study of structures of gaseous inorganic species at elevated temperatures (to 1000°C) has been demonstrated.1–6 Several studies have provided information on thermodynamic quantities,2 chemical equilibria,4, 6 and force constants2, 5 for both pure materials and mixtures. In a number of cases, however, strong resonance fluorescence has obscured the vibrational Raman spectra of the species present.3, 4 The source of this resonance fluorescence can be either the material under investigation4 or a species formed through disproportionation of the sample material. An example of the latter case is the resonance fluorescence of BiCl, which overlaps the gas phase Raman scattering of BiCl3.
KeywordsRaman Spectrum RAMAN Spectroscopy Lower Oxidation State High Temperature Vapor Spectral Slit Width
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