Repozytorium Uniwersytetu Jagiellońskiego
Thermal post-synthetic modification of Al-MIL-53–COOH : systematic investigation of the decarboxylation and condensation reaction
Thermal post-synthetic modification of Al-MIL-53–COOH ...
Opis pozycji
| tytuł: | Thermal post-synthetic modification of Al-MIL-53–COOH : systematic investigation of the decarboxylation and condensation reaction |
| autor: | Reimer Nele, Gil Barbara  , Marszałek Bartosz , Stock Norbert |
| tytuł czasopisma: | CrystEngComm |
| tom: | 14 |
| numer: | 12 |
| data wydania: | 2012 |
| strony: | 4119-4125 |
| eISSN: |
1466-8033 |
| DOI: | |
| język: | angielski |
| język czasopisma: | angielski |
| abstrakt w j. angielskim: | Aluminium trimellitate [Al(OH)(BDC–COOH)] ? 0.9H 2 O( 1 ), the Al-MIL-53–COOH derivative, was discovered under solvothermal conditions using a high-throughput set-up suitable for microwave (MW)-assisted heating. The compound shows high structural flexibility. The large-pore (lp) form of the framework is obtained under large excess of H 2 O or after solvothermal treatment with N , N -dimethylformamide upon which [Al(OH)(BDC–COOH)] ? 0.7DMF ( 2 ) is obtained. Exposure of the water rich lp form of 1 to ambient conditions leads to the transformation to the narrow-pore (np) form. Thermal activation of both compounds results in the formation of the empty lp form and the activation of 1 was studied in detail by in situ IR-spectroscopy. Depending on the activation temperature and time two post-synthetic modification (PSM) processes are observed: the partial decarboxylation and the formation of acid anhydride groups. Thus at high temperatures and long activation times [Al(OH)(BDC–OCOCO–BDC) x /2 (BDC) y ]( x + y = 1) is formed. Upon cooling in air the anhydride functionality still remains intact, but the np form is obtained in air due to the adsorption of H 2 O molecules. Sorption measurements of 1 confirm a preference for polar gases like H 2 O and CO 2 in comparison to N 2 ,H 2 , and CH 4 . The N 2 capacity depends strongly on the degree of decarboxylation. |
| punktacja wydziałowa: | 35 |
| wydział:instytut/zakład/katedra: | Wydział Chemii : Zakład Chemii Nieorganicznej |
| typ: | artykuł w czasopiśmie |
| podtyp: | artykuł |
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