Table 3.
Summary of rR features and NCA for the [CuOCu]2+ species in MFI, CHA, MOR1, MOR2 and the newly discovered MOR3.
MFI | CHA | MOR1 | MOR2 | MOR3 | |
---|---|---|---|---|---|
456 | 581 | 465 | 450 | 497 | Symmetric stretch (cm−1) |
514 | 510 | 535 | 525 | 556 | Al T-site vibration (cm−1) |
870 | 837 | 850 | 870 | 775 | Antisymmetric stretch (cm−1) |
140 | 120 | 137 | 141 | 127 | ∠CuOCu (°) |
3.8 | 4 | 3.7 | 3.8 | 3.3 | Cu-Ooxo FC (mdyn/Å) |
0.25 | 0.24 | 0.25 | 0.25 | 0.23 | Cu-Ooxo/Cu-Ooxo interaction FC: kMOM (mdyn/Å) |