From: Development and characterization of solid dispersion-based orodispersible tablets of cilnidipine
S. no. | Functional group | Reported frequency (cm−1) | Frequency of drug (cm−1) | Frequency of SD (cm−1) | Frequency of drug and excipients (cm−1) |
---|---|---|---|---|---|
1 | C–N aromatic 2° amine | 1020–1250 | 1119.71 | 1103.32 | 1104.28 |
2 | N–O | 1360–1550 | 1389.76 | 1380.11 | 1373.36 |
3 | C=O | 1630–1980 | 1752.42 | 1746.60 | 1635.69 |
4 | –OCH3 | 2815–2950 | 2929.97 | 2923.22 | 2917.43 |
5 | C–O | 1200–1225 | 1225.80 | 1232.55 | 1249.91 |
6 | N–H Aromatic 2° amine | 3250–3500 | 3464.27 | 3396.76 | 3416.05 |