doi:10.1039/C4CE02324BengSeoane, BeatrizDikhtiarenko, AllaMayoral, AlvaroTellez, CarlosCoronas, JoaquinKapteijn, FreekGascon, JorgeMetal Organic Framework synthesis in the presence of surfactants: towards hierarchical MOFs?ART-2015-88543The effect of synthesis pH and H2O/EtOH molar ratio on the textural properties of different aluminium trimesate metal organic frameworks (MOFs) prepared in the presence of the well-known cationic surfac- tant 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 tem- peratures 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 H2O and EtOH with a H2O/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.172015http://zaguan.unizar.es/record/3675510.1039/C4CE02324Bhttp://zaguan.unizar.es/record/36755oai:zaguan.unizar.es:36755info:eu-repo/grantAgreement/ES/MINECO/MAT2013-40566-Rinfo:eu-repo/grantAgreement/EC/FP7/335746/EU/Crystal Engineering of Metal Organic Frameworks for application in Mixed Matrix Membranes/CRYSTENG-MOF-MMMCRYSTENGCOMM 17 (2015), 1693-1700byhttp://creativecommons.org/licenses/by/3.0/es/info:eu-repo/semantics/openAccess