Table 2.
The chemical functional groups present in CS, TPP, PCA, CNP, PCNP, CNP-PCA and PCNP-PCA. All the important functional groups detected were listed in the table with their respective wavenumber and percentage of transmittance.
| Functional Group | Wavenumber (nm−1) |
Percentage Transmittance (% T) |
Sample |
|---|---|---|---|
| Hydrogen bond a (O—H) |
3228 | 49.26 | CS |
| 3360 | 71.24 | CNP | |
| 3383 | 55.82 | PCNP | |
| 3278 | 62.69 | PCA | |
| 3376 | 75.50 | CNP-PCA | |
| 3227 | 71.13 | PCNP-PCA | |
| Amine II group b (NH2) |
1600 | 10.00 | CS |
| 1629 | 45.68 | CNP | |
| 1635 | 35.77 | PCNP | |
| Inorganic Phosphate c (P=O) |
1201 | 35.74 | TPP |
| 1155 | 40.22 | CNP | |
| 1281 | 74.94 | pCNP | |
| Ether group d (C-O-C) |
1082 | 32.20 | CS |
| 1059 | 10 | CNP | |
| 1068 | 10 | pCNP | |
| Carbon double bond e (C=C) |
1658 | 15.56 | PCA |
| 1625 | 47.81 | CNP-PCA | |
| 1625 | 39.61 | pCNP-PCA | |
| Carbonyl group f (C=O) |
1300 | 69.14 | PCA |
| 1389 | 66.75 | CNP-PCA | |
| 1280 | 73.83 | pCNP-PCA |