Table 3.
General band assignments of the FTIR spectra
| Wavenumber (cm−1) | ||
|---|---|---|
| Lipids | 1468, 1461 | CH3-asymmetric bending: mainly lipids |
| 1736 | Carbonyl C=O stretch: lipids | |
| 3011 | Olefinic HC=CH stretch: lipids | |
| 2959, 2958 | CH3-asymmetric stretch: mainly lipids | |
| 2851, 2855 | CH2-asymmetric stretch: mainly lipids | |
| Nuclei acids | 1237 | PO2 asymmetric stretch: mainly nucleic acids |
| 1170 | CO-O-C asymmetric stretching: phospholipids | |
| 1080 | PO2-symmetric stretching: mainly nucleic acids | |
| 961–964 | C-N + -C stretch: nucleic acids | |
| Proteins | 1653, 1654 | Amide I: C=O stretching of proteins |
| 1550, 1543 | Amide II: N-H bending/C-N stretching of proteins | |
| 3302 | Amide A: mainly N-H stretching of proteins |