Table 1.
Some physical properties of α-, β- and γ-cyclodextrins (Sabadini et al., 2006; Nilsson et al., 2008).
| Property | α-CD | β-CD | γ-CD |
|---|---|---|---|
| N° glucose unities | 6 | 7 | 8 |
| MW (g mol−1) | 972 | 1,135 | 1,297 |
| Solubility in water (g L−1) | 145 | 18.5 | 232 |
| Outer diameter cavity (wide end) (Å) | 13.7 | 15.3 | 16.9 |
| Inner diameter cavity (wide end) (Å) | 5.7 | 7.8 | 9.5 |
| Volume cavity (Å3) | 174 | 262 | 427 |
| No. water molecules* inside cavity | 5.8 | 8.7 | 14.2 |
| Heat capacity (Cp) of bound water molecules | 59 | 71 | 70 |
*
Assuming a volume of a water molecule equal to 30 Å3.