FTIR spectroscopic characterization of Cu(II) coordination compounds with exopolysaccharide pullulan and its derivatives

Fractionation and some physicochemical properties of almond gum (Amygdalus communis L.) exudates

“…The peaks lying between 1200 and 1000 cm À1 belong to the complex bonds of CeO and CeC. Finally, the CeH bonds are represented by the peaks between 1000 and 700 cm À1 (Mitic, Nikolic, Cakic, Premovic, & Ili, 2009). …”

Enhanced Fenton-like degradation of pharmaceuticals over framework copper species in copper-doped mesoporous silica microspheres

“…The incorporation of framework copper in mesoporous silica increased the concentration of the surface unsaturated Cu centers, increasing the intensity of m(OH). For PHT compound, the absorption bands at 3271 and 3207 cm À1 ascribed to the stretching vibration of NAH, the band at 1774 and 1718 cm À1 were assigned to the stretching vibration of C@O, and the bands at 1448 and 1402 cm À1 were assigned to the skeleton vibration of aromatic rings [45]. There were no significant changes between the spectra of M 2 used after 20 min adsorption of PHT and the spectra of fresh M 2 , indicating that PHT was not copiously adsorbed on the surface of M 2 , due to no AOH or ACOOH existing in the structure of PHT.…”

Structural elucidation of an extracellular polysaccharide produced by the marine fungus Aspergillus versicolor

“…The band at 916 cm −1 was due to the asymmetric telescopic vibration of glucopyranose ring, and the band at 845 cm −1 indicated the presence of ␣-anomeric configuration. The bands at 916 and 845 cm −1 also indicated that the glucopyranose units in AWP had a C 1 chair conformation (Mitić et al, 2009(Mitić et al, , 2010Shingel, 2002).…”

“…IR spectrum of AWP. Ilić, & Nikolić, 2008;Mitić, Cakić, & Nikolić, 2010;Mitić et al, 2009Mitić et al, , 2011. The bands at 1456 and 1342 cm −1 were the absorption peaks of variable angle vibration of C H bond.…”

“…3. The broad and intense band at 3383 cm −1 was the result of valent vibrations OH groups and valent vibration of H 2 O constitutional molecules (Mitić, Nikolić, Cakić, Premović, & Ilić, 2009), and the band at 2927 cm −1 was attributed to the stretching vibration of C H bond (Chen et al, 2011;Mitić et al, 2011). The band at 1650 cm −1 was due to the bending vibrations of HOH, and the band at 1419 cm −1 originated from the bending vibrations of O H bond (Cakić,Mitić,Nikolić,Fig.…”