Table 2 FTIR spectra peaks assignment from poplar wood samples
Number | Wavenumber (cm−1) | Assignment of the peak |
|---|---|---|
1 | 2920 | Aliphatic C–H stretching vibration |
2 | 1735 | Characteristic peaks of the hemicellulose–lignin complex |
3 | 1605 | Aromatic skeleton vibration in lignin |
4 | 1510 | Guaiacyl ring from lignin |
5 | 1430 | Cellulose I absorption band |
6 | 1375 | C–H deformation of crystalline cellulose and hemicellulose |
7 | 1320 | Aromatic ring breathing syringyl and guaiacyl units |
8 | 1250 | Hemicellulose peaks (acetyl groups C-O) |
9 | 1162 | C–O–C vibration in cellulose and hemicellulose |
10 | 1105 | C–OH skeletal vibration of cellulose |
11 | 898 | C–O–C stretching of amorphous cellulose |