Official Journal of the Japan Wood Research Society
Table 5 Characteristic bands of the FTIR spectra of wood samples
From: Study on the changes in surface characteristics of Populus tomentosa due to thermo-hydro-process
Wavenumber (cm−1) | Functional group | Assignment |
|---|---|---|
1740‒1730 | ‒COOH (C=O) | Free carbonyl groups, stretching of acetyl or carboxylic acid (hemicelluloses) |
1660‒1640 | C=O | Quinines and quinine methides, adsorbed water |
1600 | C=C | Aromatic ring (lignin) |
1510 | C=C | Aromatic ring (lignin) |
1373 | C‒H | CH deformation (cellulose and hemicellulose) |
1335‒1330 | O‒H | OH in plane bending (cellulose) |
1270‒1267 | C‒O | Guaiacyl ring breathing with CO‒stretching (lignin and hemicelluloses), esters |
1103 | C‒H | Guaiacyl and syringyl (lignin) |
1050‒1030 | C‒O, C‒H | Primary alcohol, guaiacyl (lignin) |
898 | C‒H | CH deformation (cellulose) |