Table 1.
Vibrational wavenumbers of functional groups of pure INH and its nanocomposites
| Assignment | Vibrational wavenumbers cm−1
|
||
|---|---|---|---|
| (A) INH |
(B) Nanocomposite A |
(C) Nanocomposite B |
|
| N-H stretching | 3,29938,39 | Overlapped with OH of LDH and interlayer water | Overlapped with OH of LDH and interlayer water |
| ν (O-H) in the layer; H2O with OH stretching | 3,351 | 3,357 | |
| C-H asymstretching | 3,110 | Overlapped with OH of LDH and interlayer water | Overlapped with OH of LDH and interlayer water |
| C-H symstretching | 3,100 | Overlapped with OH of LDH and interlayer water | Overlapped with OH of LDH and interlayer water |
| C=O | 1,647 | 1,594 | 1,596 |
| NH2 scissoring | 1,64039 | ||
| C=N ring | 1,54637,38 | 1,543 | 1,544 |
| C-N stretching | 1,32437,38 | 1,375 | 1,369 |
| Ring C-C-C asymbending | 745 | 758 | 756 |
| Ring C-C-C symbending | 657 | 617 | 615 |
Abbreviations: INH, isoniazid; Asym, asymmetric; Sym, symmetric; LDH, layered double hydroxide; OH, hydroxyl group.