Table 1. Assignments of FTIR bands

Band (cm–1)	Assignment
3,375	O-H stretching
2,917	C-H asymmetric stretching
2,845	C-H symmetric stretching
1,703	C = O stretching
1,600	Aromatic skeletal vibrations
1,511	Aromatic skeletal vibrations
1,454	Asymmetric bending deformation of methyl and methylene groups
1,324	C-O of syringyl ring
1,267	C-O of guaiacyl ring
1,208	C-C plus C-O stretch
1,107	C-O deformation in ester bond
1,031	Aromatic C-H in-plane deformation (G > S) plus C-O deformation in primary alcohols

Adapted from Li et al. (2016) with permission of Royal Society of Chemistry.
Adapted from Lourençon et al. (2015) with permission of Elsevier.
FTIR: Fourier transform infrared spectroscopy.