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Get Free AccessThe first zeolite structure (ITQ-40) that contains double four (D4) and double three (D3) member ring secondary building units has been synthesized by introducing Ge and NH(4)F and working in concentrated synthesis gels. It is the first time that D3-Rs have been observed in a zeolite structure. As was previously analyzed [Brunner GO, Meier, WM (1989) Nature 337:146-147], such a structure has a very low framework density (10.1 T/1,000 A(3)). Indeed, ITQ-40 has the lowest framework density ever achieved in oxygen-containing zeolites. Furthermore, it contains large pore openings, i.e., 15-member rings parallel to the [001] hexagonal axis and 16-member ring channels perpendicular to this axis. The results presented here push ahead the possibilities of zeolites for uses in electronics, control delivery of drugs and chemicals, as well as for catalysis.
Avelino Avelino, María J. Díaz‐Cabañas, Jiuxing Jiang, Mobae Afeworki, Douglas L. Dorset, S. Soled, Karl G. Strohmaier (2010). Extra-large pore zeolite (ITQ-40) with the lowest framework density containing double four- and double three-rings. Proceedings of the National Academy of Sciences, 107(32), pp. 13997-14002, DOI: 10.1073/pnas.1003009107.
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Type
Article
Year
2010
Authors
7
Datasets
0
Total Files
0
Language
English
Journal
Proceedings of the National Academy of Sciences
DOI
10.1073/pnas.1003009107
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