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Summary of the FT-IR data on the TUD-1 materials: νOH and νCO modes upon CO adsorption at 77 K for Zr-TUD-1, Al-Zr-4.3:1, Al-Zr-1.5:1, Al-Zr-1:2 and Al-TUD-1
| νOH [cm−1][a] | ΔνOH [cm−1][a] | νCO [cm−1] Al3+ | νCO [cm−1] Zr4+ | νCO [cm−1] Si-OH-Al | |
|---|---|---|---|---|---|
| Zr-TUD-1 | 3514 | 233 | – | 2200 | – |
| Al-Zr-4.3:1 | 3524 | 223 | 2227 | 2190 | 2177 |
| Al-Zr-1.5:1 | 3506 | 241 | 2229 | 2193 | 2177 |
| Al-Zr-1:2 | 3525 | 222 | 2232 | 2193 | – |
| Al-TUD-1 | 3506 | 241 | 2230 | – | 2177 |
νOH mode of a broad band appearing at low CO pressure in the difference spectra.
