Biomass component | Absorption peak | Â |
---|---|---|
Wavenumber (cm−1) | Characteristic bond and movement |  |
Hemicellulose | 1737 | C=O stretching |
1056 | C–O stretch | |
1235 | C–O stretch | |
1375 | C–H deformation | |
Lignin | 1636 | C=O stretching |
1516 | Phenyl ring stretching | |
1218 | C–O of guaiacyl ring | |
1268 | C–O of guaiacyl ring | |
1315 | C–O of syringyl ring | |
1329 | Guaiacyl and syringyl condensed | |
1502–1600 | Aromatic skeletal vibration | |
1235 | C–O stretch | |
Cellulose | 1158 | C–O–C stretching |
900–901 | Amorphous cellulose | |
1033 | C–O stretching at C6 | |
1061 | C–C stretching | |
1114 | C–O stretching at C3 | |
1056 | C–O stretch | |
1428 | Crystalline cellulose |