Table 1. Crystallographic and Pore Information of ZIF-7-I, -II, and -III.
| ZIF-7-I | ZIF-7-II | ZIF-7-III | |
|---|---|---|---|
| formula | Zn(PhIm)2 | Zn9(PhIm)18 | Zn4(PhIm)16 |
| crystal system | rhombohedral | triclinic | monoclinic |
| space group | R3̅ | P1̅ | C2/c |
| a [Å] | 22.989(3) | 23.948(6) | 16.106(3) |
| b [Å] | 22.989(3) | 21.354(6) | 19.511(4) |
| c [Å] | 15.763(3) | 16.349(4) | 16.126(3) |
| α [deg] | 90 | 90.28(2) | 90 |
| β [deg] | 90 | 93.28(2) | 90 |
| γ [deg] | 120.00 | 108.41(1) | 96.37(3) |
| V [Å3] | 7214(2) | 7917(3) | 5036(1) |
| density [Mg/m3] | 1.242 | 1.131 | 1.581 |
| V (void) [Å3]a | 1675 (23.2%) | 2289 (28.9%) | 0 |
a
Void analysis was carried out with Mercury 3.1 using a probe radius of 1.2 Å and a grid spacing of 0.7 Å. Guests in ZIF-7-I were removed for calculation.