Table A2.
Summary of FT-IR analysis of β-cyclodextrin (β-CD), lemongrass essential oil, (LG oil), inclusion complexes LG-1 and LG-2, lemon eucalyptus essential oil, (LE oil), inclusion complexes LE-1 and LE-2, geranium Egyptian essential oil, (GE oil), geranium Egyptian inclusion complexes GE-1 and GE-2. All values are in cm−1.
| Band Assignment | β-CD | LG oil | LG-1 | LG-2 | LE oil | LE-1 | LE-2 | GE oil | GE-1 | GE-2 |
|---|---|---|---|---|---|---|---|---|---|---|
| O-H stretching | 3383 | - | 3356 | 3356 | - | 3363 | 3363 | 3371 | 3363 | 3352 |
| =CH stretching | - | 3479 | - | - | 3443 | - | - | - | - | - |
| –CH2 stretching | 2939 | 2966–2858 | 2924 | 2924 | 2920 | 2924 | 2924 | 2962–2874 | 2924 | 2924 |
| C=O stretching | 1678 | 1674 | 1674 | 1724 | 1720 | 1716 | 1728 | - | - | |
| H–O–H bending | 1639 | - | - | - | - | 1639 | 1639 | - | 1639 | 1639 |
| =CH scissoring | - | 1446 | - | - | 1450 | - | - | 1450 | - | - |
| C–O–C stretching | 1157 | - | - | - | - | - | - | - | - |