Wavenumber (cm−1)

Assignments

References

AC

NA

RC

3333.52

3335.12

3332.40

Elongation of -OH from hemicelluloses and O-H from cellulose

[24] [28] [30]

2916.83

2929.15

2996.52

Stretching of C-H and CH2 of cellulose

[13] [22] [23]

1733.03

1729.24

1730.67

Symmetric C=O prolongation of hemicelluloses and pectins

[12] [22] [27] [31]

1632.25

1631.21

1634.50

Shearing of the -OH bond in open water

[22] [23]

1539.25

1508.46

1512.81

Symmetrical stretching of C=C of lignin

[24] [31]

1454.62

1454.62

1454.62

Bending of CH2 in cellulose and asymmetric deformation of CH3 in cellulose.

[13]

1030.40

1032.18

1031.27

Elongation vibration of the -OH and C=O bonds of cellulose.

[24] [28]

893.74

893.74

893.74

Symmetrical stretching of the C-H and O-H bonds of cellulose.

[13]