From: Elucidation of the effect of ionic liquid pretreatment on rice husk via structural analyses
Group frequency, wavenumber, cm-1 | Origin | Assignment | Reference |
---|---|---|---|
800 – 950 | C-H | C-H deformation vibration in cellulose | [34] |
~1035 | C-O | C-O stretching vibration in cellulose/hemicellulose and aryl-OH group in lignin | [31] |
 |  |  | [33] |
 |  |  | [34] |
~1457 | C-H | Asymmetric bending of CH3 and methoxy (-OCH3) groups present in lignin | [34] |
 |  |  | [33] |
 |  |  | [24] |
~1513 | C = C-Ca | Aromatic skeletal stretching in lignin | [35] |
 |  |  | [36] |
~1637 | O-H | O-H bending vibration of adsorbed water molecules | [31] |
 |  |  | [37] |
~2919 | C-H | C-H stretching in cellulose-rich material | [38] |
 |  |  | [39] |
2995 – 4000 | O-H | Free and hydrogen-bonded OH stretching | [40] |
 |  |  | [31] |
 |  |  | [38] |