title: Synthesis of highly stable metal-containing extra-large-pore molecular sieves.
abstract: The isomorphic substitution of two different metals (Mg and Co) within the framework of the ITQ-51 zeotype (IFO structure) using bulky aromatic proton sponges as organic structure-directing agents (OSDAs) has allowed the synthesis of different stable metal-containing extra-large-pore zeotypes with high pore accessibility and acidity. These metal-containing extra-large-pore zeolites, named MgITQ-51 and CoITQ-51, have been characterized by different techniques, such as powder X-ray diffraction, scanning electron microscopy, energy dispersive X-ray spectrometry, UV-Vis spectroscopy, temperature programmed desorption of ammonia and Fourier transform infrared spectroscopy, to study their physico-chemical properties. The characterization confirms the preferential insertion of Mg and Co atoms within the crystalline structure of the ITQ-51 zeotype, providing high Brønsted acidity, and allowing their use as efficient heterogeneous acid catalysts in industrially relevant reactions involving bulky organic molecules.
authors.affiliation: Instituto de Tecnología Química, Universidad Politécnica de Valencia-Consejo Superior de Investigaciones Científicas (UPV-CSIC), Valencia 46022, Spain.
authors.forename: Raquel
authors.initials: R
authors.lastname: Martínez-Franco
authors.affiliation: Instituto de Tecnología Química, Universidad Politécnica de Valencia-Consejo Superior de Investigaciones Científicas (UPV-CSIC), Valencia 46022, Spain.
authors.forename: Cecilia
authors.initials: C
authors.lastname: Paris
authors.affiliation: Instituto de Tecnología Química, Universidad Politécnica de Valencia-Consejo Superior de Investigaciones Científicas (UPV-CSIC), Valencia 46022, Spain mmoliner@itq.upv.es.
authors.forename: Manuel
authors.initials: M
authors.lastname: Moliner
authors.affiliation: Instituto de Tecnología Química, Universidad Politécnica de Valencia-Consejo Superior de Investigaciones Científicas (UPV-CSIC), Valencia 46022, Spain King Fahd University of Petroleum and Minerals, PO Box 989, Dhahran 31261, Saudi Arabia acorma@itq.upv.es.
authors.forename: Avelino
authors.initials: A
authors.lastname: Corma
keywords: extra-large pore zeotypes; heterogeneous catalysis; metalloaluminophosphates