| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 72580 | Microporous and Mesoporous Materials | 2015 | 14 Pages |
•NO adsorption in MOFs studied by DRIFTS and EPR spectroscopy at low temperatures.•Coordination of NO to metal sites of the MOFs could be confirmed.•A predictment of the strength of the adsorption could be derived.•Ni-CPO-27 and Co-CPO-27 are promising materials for NO storage applications.
The metal-organic framework materials M-MIL-100 (M = Al, Fe) and M-CPO-27 (M = Co, Ni) have been studied with respect to the adsorption of nitric oxide employing low-temperature ESR and IR spectroscopy. Exposure of the previously desolvated Ni (II) and Co (II) sites in CPO-27 leads to the formation of metal nitrosyl complexes that are stable up to temperatures of 393 K. A weaker bond is formed between the iron metal centers in the Fe-MIL-100 type materials and the nitric oxide molecule. Using in-situ DRIFT and EPR spectroscopy at low temperatures, the formation of Co-, Ni- and Fe–NO adducts is evident from the respective spectra, while specifically strong interactions are absent in Al-MIL-100 and Al/Cr-Mil-53.
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