| Wave number (cm-1) |
Frequency assignment |
| Control |
Treated |
| 2808-3071 |
2818-3081 |
C-H stretching |
| 1696-1710 |
1703-1714 |
C=O (COO-) asymmetric stretching |
| 1596 |
1594 |
C=C stretching |
| 1417 |
1417 |
C=N stretching |
| 1323 |
1324 |
C=O (COO-) symmetric stretching |
| 1301 |
1301 |
C-N stretching |
| 1186 |
1180 |
C-OH (Ph-OH) stretching |
| 1033-1114 |
1037-1116 |
=C-H in-plane bending |
| 642-812 |
642-812 |
=C-H out of plane bending |
|
