title: "Ab initio" synthesis of zeolites for preestablished catalytic reactions.
abstract: Unlike homogeneous catalysts that are often designed for particular reactions, zeolites are heterogeneous catalysts that are explored and optimized in a heuristic fashion. We present a methodology for synthesizing active and selective zeolites by using organic structure-directing agents that mimic the transition state (TS) of preestablished reactions to be catalyzed. In these zeolites, the pores and cavities could be generated approaching a molecular-recognition pattern. For disproportionation of toluene and isomerization of ethylbenzene into xylenes, the TSs are larger than the reaction products. Zeolite ITQ-27 showed high disproportionation activity, and ITQ-64 showed high selectivity for the desired para and ortho isomers. For the case of a product and TS of similar size, we synthesized a catalyst, MIT-1, for the isomerization ofendo-dicyclopentane into adamantane.
authors.affiliation: Instituto de Tecnología Química, Universitat Politècnica de València-Consejo Superior de Investigaciones Científicas, Avenida de los Naranjos s/n, 46022 Valencia, Spain.
authors.forename: Eva María
authors.identifier: 0000-0001-6025-0122
authors.initials: EM
authors.lastname: Gallego
authors.affiliation: Instituto de Tecnología Química, Universitat Politècnica de València-Consejo Superior de Investigaciones Científicas, Avenida de los Naranjos s/n, 46022 Valencia, Spain.
authors.forename: M Teresa
authors.identifier: 0000-0002-4533-0981
authors.initials: MT
authors.lastname: Portilla
authors.affiliation: Instituto de Tecnología Química, Universitat Politècnica de València-Consejo Superior de Investigaciones Científicas, Avenida de los Naranjos s/n, 46022 Valencia, Spain.
authors.forename: Cecilia
authors.identifier: 0000-0002-5673-8114
authors.initials: C
authors.lastname: Paris
authors.affiliation: Instituto de Tecnología Química, Universitat Politècnica de València-Consejo Superior de Investigaciones Científicas, Avenida de los Naranjos s/n, 46022 Valencia, Spain.
authors.forename: Alejandro
authors.initials: A
authors.lastname: León-Escamilla
authors.affiliation: Instituto de Tecnología Química, Universitat Politècnica de València-Consejo Superior de Investigaciones Científicas, Avenida de los Naranjos s/n, 46022 Valencia, Spain.
authors.forename: Mercedes
authors.identifier: 0000-0002-6211-5888
authors.initials: M
authors.lastname: Boronat
authors.affiliation: Instituto de Tecnología Química, Universitat Politècnica de València-Consejo Superior de Investigaciones Científicas, Avenida de los Naranjos s/n, 46022 Valencia, Spain.
authors.forename: Manuel
authors.identifier: 0000-0002-5440-716X
authors.initials: M
authors.lastname: Moliner
authors.affiliation: Instituto de Tecnología Química, Universitat Politècnica de València-Consejo Superior de Investigaciones Científicas, Avenida de los Naranjos s/n, 46022 Valencia, Spain. acorma@itq.upv.es.
authors.forename: Avelino
authors.identifier: 0000-0002-2232-3527
authors.initials: A
authors.lastname: Corma