Wavenumber (cm−1) | Assignments | References |
3333 | OH stretching (cellulose) | [20] |
2917 | C-H stretching (cellulose-hemicellulose) | [16] [20] [21] [22] |
1728 | C=O stretching vibration (pectins, waxes et hemicellulose) | [7] [21] [23] |
1605 | Aromatic ring (lignin) | [16] [22] |
1506 | C=C aromatic symmetrical stretching (lignin) | [20] [21] [22] |
1425 | Vibration of the carboxyl bond characteristic of pectins | [16] |
1315 | CH wagging (cellulose and hemicellulose) C-O stretching vibration in ester | [24] [25] |
1234 | Acetyl groups (hemicellulose) | [16] |
1031 | C-O stretching ring (cellulose and hemicellulose) | [16] |
662 | C-OH out of plane bending (cellulose) | [20] [25] |