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Metal organic framework synthesis in the presence of surfactants: towards hierarchical MOFs?

The effect of synthesis pH and H(2)O/EtOH molar ratio on the textural properties of different aluminium trimesate metal organic frameworks (MOFs) prepared in the presence of the well-known cationic surfactant cetyltrimethylammonium bromide (CTAB) at 120 °C was studied with the purpose of obtaining a...

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Autores principales: Seoane, B., Dikhtiarenko, A., Mayoral, A., Tellez, C., Coronas, J., Kapteijn, F., Gascon, J.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Royal Society of Chemistry 2015
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4456781/
https://www.ncbi.nlm.nih.gov/pubmed/26246799
http://dx.doi.org/10.1039/c4ce02324b
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author Seoane, B.
Dikhtiarenko, A.
Mayoral, A.
Tellez, C.
Coronas, J.
Kapteijn, F.
Gascon, J.
author_facet Seoane, B.
Dikhtiarenko, A.
Mayoral, A.
Tellez, C.
Coronas, J.
Kapteijn, F.
Gascon, J.
author_sort Seoane, B.
collection PubMed
description The effect of synthesis pH and H(2)O/EtOH molar ratio on the textural properties of different aluminium trimesate metal organic frameworks (MOFs) prepared in the presence of the well-known cationic surfactant cetyltrimethylammonium bromide (CTAB) at 120 °C was studied with the purpose of obtaining a MOF with hierarchical pore structure. Depending on the pH and the solvent used, different topologies were obtained (namely, MIL-96, MIL-100 and MIL-110). On the one hand, MIL-110 was obtained at lower temperatures than those commonly reported in the literature and without additives to control the pH; on the other hand, MIL-100 with crystallite sizes as small as 30 ± 10 nm could be easily synthesized in a mixture of H(2)O and EtOH with a H(2)O/EtOH molar ratio of 3.4 at pH 2.6 in the presence of CTAB. The resulting material displays a hierarchical porosity that combines the microporosity from the MOF and the non-ordered mesopores defined in between the MOF nanoparticles. Interestingly, the maximum of the pore size distribution could be varied between 3 and 33 nm. Finally, at pH 2.5 and using water as a solvent, platelets of MIL-96, a morphology never observed before for this MOF, were synthesized with a (001) preferential crystal orientation, the (001) plane running parallel to the bipyramidal cages of the MIL-96 topology.
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spelling pubmed-44567812015-08-03 Metal organic framework synthesis in the presence of surfactants: towards hierarchical MOFs? Seoane, B. Dikhtiarenko, A. Mayoral, A. Tellez, C. Coronas, J. Kapteijn, F. Gascon, J. CrystEngComm Chemistry The effect of synthesis pH and H(2)O/EtOH molar ratio on the textural properties of different aluminium trimesate metal organic frameworks (MOFs) prepared in the presence of the well-known cationic surfactant cetyltrimethylammonium bromide (CTAB) at 120 °C was studied with the purpose of obtaining a MOF with hierarchical pore structure. Depending on the pH and the solvent used, different topologies were obtained (namely, MIL-96, MIL-100 and MIL-110). On the one hand, MIL-110 was obtained at lower temperatures than those commonly reported in the literature and without additives to control the pH; on the other hand, MIL-100 with crystallite sizes as small as 30 ± 10 nm could be easily synthesized in a mixture of H(2)O and EtOH with a H(2)O/EtOH molar ratio of 3.4 at pH 2.6 in the presence of CTAB. The resulting material displays a hierarchical porosity that combines the microporosity from the MOF and the non-ordered mesopores defined in between the MOF nanoparticles. Interestingly, the maximum of the pore size distribution could be varied between 3 and 33 nm. Finally, at pH 2.5 and using water as a solvent, platelets of MIL-96, a morphology never observed before for this MOF, were synthesized with a (001) preferential crystal orientation, the (001) plane running parallel to the bipyramidal cages of the MIL-96 topology. Royal Society of Chemistry 2015-02-21 2015-01-23 /pmc/articles/PMC4456781/ /pubmed/26246799 http://dx.doi.org/10.1039/c4ce02324b Text en This journal is © The Royal Society of Chemistry 2015 http://creativecommons.org/licenses/by/3.0/ This is an Open Access article distributed under the terms of the Creative Commons Attribution 3.0 Unported License (http://creativecommons.org/licenses/by/3.0/) which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
spellingShingle Chemistry
Seoane, B.
Dikhtiarenko, A.
Mayoral, A.
Tellez, C.
Coronas, J.
Kapteijn, F.
Gascon, J.
Metal organic framework synthesis in the presence of surfactants: towards hierarchical MOFs?
title Metal organic framework synthesis in the presence of surfactants: towards hierarchical MOFs?
title_full Metal organic framework synthesis in the presence of surfactants: towards hierarchical MOFs?
title_fullStr Metal organic framework synthesis in the presence of surfactants: towards hierarchical MOFs?
title_full_unstemmed Metal organic framework synthesis in the presence of surfactants: towards hierarchical MOFs?
title_short Metal organic framework synthesis in the presence of surfactants: towards hierarchical MOFs?
title_sort metal organic framework synthesis in the presence of surfactants: towards hierarchical mofs?
topic Chemistry
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4456781/
https://www.ncbi.nlm.nih.gov/pubmed/26246799
http://dx.doi.org/10.1039/c4ce02324b
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