Serial No. |
SKL
Band position (cm-1) |
DL
Band position (cm-1) |
Assignment |
1 |
3424 |
3454 |
O-H stretching |
2 |
2960 |
2937 |
C-H stretching |
3 |
2920 |
2870 |
C-H stretching |
4 |
2652 |
- |
C-H stretching |
5 |
- |
1664 |
C=O stretching (unconjugated) |
6 |
1603 |
- |
Aromatic skeletal
vibration+C=O stretching |
7 |
1511 |
1501 |
Aromatic skeletal vibration |
8 |
1455 |
1437 |
C-H deformation (CH3 and CH2) |
9 |
- |
1409 |
C-H in-plane deformation with aromatic ring stretching |
10 |
- |
1389 |
C-O of syringyl (S) ring |
11 |
1264 |
1248 |
C-O of guaiacyl (G) ring |
12 |
1206 |
- |
C-C + C-O stretch |
13 |
1095 |
1092 |
Aromatic C-H in-plane deformation in the guaiacyl ring |