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

Table 2: Results of the IR Bands obtained in SKL and DL.