| Wave number (cm−1) | Assignments |
| 3385 | O−H stretching |
| 3076 | aromatic C−H stretching |
| 2889 | C−H stretching of −CH2 group |
| 1716 | carbonyl stretching |
| 1534 | anti-symmetric stretching of COO− |
| 1375 | symmetric stretching of COO− |
| 1601 | C=N ring stretching |
| 1534 | NO2 stretching |
| 875 | out of plane bending of C−O deformation |
| 816 | C−C in plane and out plane bending |
| 746 - 500 | in-plane bending of quinoline |