Absorption peak (cm−1) | Vibrational assignment | Functional group | References |
---|---|---|---|
3273.16 | O–H stretching and N–H asymmetric stretching | Amine and hydroxyl | [75] |
1614.88 | C=O stretching | Amide I | [45] |
1550.42 | N–H bending | Amide II | [45] |
1423.64 | CH2/CH3 bending | Lipids and proteins peptide | [76] |
1367.59 | C=O of COO− symmetric stretching | Carboxylate | [19] |
1221.1 | P=O. P–O | Phosphate | [45] |
1095.79 | C–C=O, C–O–P | Hydroxyl from saccharides, phosphoprotein |