Table 1.
Fourier transform infrared (FTIR) measurements.
| Position (cm−1) | Vibrations |
|---|---|
| PEI | |
| 3500 | NH asymmetric stretching |
| 3391 | NH symmetric stretching |
| 3365 | NH stretching II |
| 2915 | CH asymmetric stretching |
| 2881 | CH symmetric stretching |
| 1647 | N–H deformation |
| 1496 | C–H deformation |
| 1043 | C–N stretching |
| AchE | |
| 3282.25 | OH stretching |
| 2962 | C–H stretching |
| 2340; 2360 | Asymmetric stretching, CO2 gas phase influence |
| 1700–1600 | Amide I |
| 1600–1500 | Amide II |
| 1451–1410 1200−1405 1300 |
C==C stretching vibration νC−N stretch νN−H bend |