title: Synthesis of an extra-large molecular sieve using proton sponges as organic structure-directing agents.
abstract: The synthesis of crystalline microporous materials containing large pores is in high demand by industry, especially for the use of these materials as catalysts in chemical processes involving bulky molecules. An extra-large-pore silicoaluminophosphate with 16-ring openings, ITQ-51, has been synthesized by the use of bulky aromatic proton sponges as organic structure-directing agents. Proton sponges show exceptional properties for directing extra-large zeolites because of their unusually high basicity combined with their large size and rigidity. This extra-large-pore material is stable after calcination, being one of the very few examples of hydrothermally stable molecular sieves containing extra-large pores. The structure of ITQ-51 was solved from submicrometer-sized crystals using the rotation electron diffraction method. Finally, several hypothetical zeolites related to ITQ-51 have been proposed.
authors: Instituto de Tecnología Química, Universidad Politécnica de Valencia, Consejo Superior de Investigaciones Científicas (UPV-CSIC), Valencia 46022, Spain.
authors: Raquel
authors: R
authors: Martínez-Franco
authors: Manuel
authors: M
authors: Moliner
authors: Yifeng
authors: Y
authors: Yun
authors: Junliang
authors: J
authors: Sun
authors: Wei
authors: W
authors: Wan
authors: Xiaodong
authors: X
authors: Zou
authors: Avelino
authors: A
authors: Corma