Raman study of cation effect on sulfate vibration modes in solid state and in aqueous solutions

Abstract

International audienc

Raman Spectroscopic Measurements of Co2Dissolved in Seawater for Laser Remote Sensing in Water

“…Also, the water Raman signal at ~1645 cm -1 is utilized as an internal standard for evaluating the dissolved CO2 concentration [2]. On the other hand, the spectrum of the standard seawater has characteristic peaks associated with the SO4 2-of the S-O symmetric stretching mode at ~984 cm -1 and anti-symmetric stretching modes from 1060 to 1180 cm -1 [9], which do not interfere with the CO2 Raman spectrum.…”

Insights into the new Th (IV) sulfate fluoride complex: Synthesis, crystal structures, and temperature dependent spectroscopic properties

“…The Raman spectra of compound 1 and 2 both show identical vibration modes of the S-O bond [38,39] (see Fig. 8).…”

Inorganic salts diluted in water probed by Raman spectrometry: Data processing and performance evaluation

“…The large peak located at 1047 cm −1 is present in all nitrate solutions and corresponds to the main vibrational mode of the nitrate anion NO 3 − . Its position was found to be independent of the monoatomic cation in aqueous solutions [15]. Besides the nitrate signature the spectrum exhibits the wide OH-stretching band (OH-SB) of the water molecule extending from 2800 to 3900 cm −1 and a weak band lying around 1635 cm −1 and corresponding to the OH-bending band (OH-BB).…”

“…The position of this line (i.e. the frequency of one vibrational mode assigned to the line) and its width depend on the state of the substance and environment conditions [15]. Moreover the width is varying with spectrometer resolution.…”