[IR, Raman and DFT studies of Sudan red III and IV].

Infrared spectroscopy (IR) and normal Raman spectroscopy (NRS) of Sudan red(III) and Sudan red(IV), and surface -enhanced Raman spectroscopy(SERS) of them on Cu-Ag nanocomposite material were reported in the present paper. The density functional theory (DFT) calculation was applied to calculate IR and NRS on a B3LYP/6-311+G (d, p) level, and the theoretically calculated spectra were carefully compared with the obtained experimental spectra. The vibrational peaks were assigned by the software of Gauss view 5.

[Study of the epimers of dexamethasone sodium phosphate and betamethasone sodium phosphate by FTIR, FT-Raman and SERS].

Abstract Infrared spectroscopy (FTIR), normal Raman spectroscopy (NRS) of the solids and saturated solutions and surface-enhanced Raman spectroscopy (SERS) on the silver colloidal substrate were reported. The vibrational modes of each group were analyzed, and the enhanced peaks were assigned and compared. The results showed that the major differences between the epimers were the frequency of the CH3 asymmetric stretching vibration and symmetric in-plane deformation vibration of them.