Journal
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
Volume 134, Issue 32, Pages 13232-13235Publisher
AMER CHEMICAL SOC
DOI: 10.1021/ja306013k
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Funding
- Spanish MICINN [MAT2009-14528-C02-01, PLE2009-0054]
- Consolider Ingenio 2010-Multicat
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A new small-pore germanosilicate zeolite, named as ITQ-49, has been synthesized using a new ditetraalkylphosphonium dication as an organic structure-directing agent, and its structure has been solved by direct methods applied to the powder X-ray diffraction pattern of the calcined solid. This new zeolite crystallizes in the space group Immm with cell parameters a = 19.6007(8) angstrom, b = 18.3274(7) angstrom, and c = 16.5335(6) angstrom. The pore topology of ITQ-49 consists of large, nonspherical cavities that are connected to each other through small eight-membered-ring windows, resulting in a unidirectional small-pore zeolite that has a relatively large adsorption capacity. Also, ITQ-49 contains double four-membered-ring units where Ge is preferentially located, and fluoride anions are placed inside these units.
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