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Peak Values Obtained from the FT-IR Studies
| Peak assignment | Peaks (cm−1) | ||
|---|---|---|---|
| Famotidine | Binary complex (FAM: β-CD 1:1M) | Ternary complex (FAM: β-CD:HPMC) | |
| N–H stretching | 3,502.4 | Absent | Absent |
| Aromatic –C=C– stretching | 1,599.2 | Absent | Absent |
| –C=N– stretching | 1,492.9 | 1,491.2 | 1,458.9 |
| O=S=O stretching | 1,430.7 | 1,427.7 | 1,415.1 |
| Aromatic –C=C– stretching and bending | 891.0 | Absent | Absent |
| Aromatic –C=C– stretching and bending | 777.1 | 777.6 | Absent |
| Aromatic –C=C– stretching and bending | 542.3 | 536.8 | Absent |
