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Guest/Host Relationships in the Synthesis of the Novel Cage-Based Zeolites SSZ-35, SSZ-36, and SSZ-39

Wagner, Paul and Nakagawa, Yumi and Lee, Greg S. and Davis, Mark E. and Elomari, Saleh and Medrud, Ronald C. and Zones, S. I. (2000) Guest/Host Relationships in the Synthesis of the Novel Cage-Based Zeolites SSZ-35, SSZ-36, and SSZ-39. Journal of the American Chemical Society, 122 (2). pp. 263-273. ISSN 0002-7863. doi:10.1021/ja990722u.

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Here, we report the synthesis and structure of three high-silica molecular sieves, SSZ-35, SSZ-36, and SSZ-39, that are prepared from a library of 37 different cyclic and polycyclic quaternized amine molecules that are used as structure-directing agents (SDAs). The size and shape of the quaternized amine molecules are purposely designed in order to obtain novel zeolite structures, and the synthesis of these molecules is presented. The selectivity for the three molecular sieve phases is found to depend on both the SDA and the degree of heteroatom lattice substitution of Al^(3+) or B^(3+) in the silicate framework. Molecular modeling is utilized to probe the effects of the nonbonded SDA/zeolite-framework interaction energy on the selectivity for the observed molecular sieve phase. The Rietveld refinement of the powder X-ray data confirms the structure of the SSZ-39 zeolite to be isomorphous with the aluminophosphate molecular sieve, SAPO-18 (AEI). The structure of SSZ-36 is found to possess a range of fault probabilities between the two-dimensional channel system, end-member polymorphs, ITQ-3 and RUB-13 (International Zeolite Association Codes ITE and RTH, respectively). The SSZ-35 structure is reported to contain a one-dimensional pore system possessing stacked cages circumscribed by alternating rings of 10 and 18 tetrahedral atoms (10- and 18-membered rings).

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Davis, Mark E.0000-0001-8294-1477
Additional Information:© 2000 American Chemical Society. Received March 5, 1999. Revised Manuscript Received August 12, 1999. Publication Date (Web): December 31, 1999. We thank Dr. Guang Zhang and Mr. Ken Ong for help in preparation and data collection at the synchrotron source. For the gathering of X-ray data from Beamline X7A, the research was carried out at the National Synchrotron Light Source at the Brookhaven National Laboratory. This facility is supported by the U.S. Department of Energy, Division of Materials Science and Division of Chemical Sciences. We appreciate the help of Dr. D. E. Cox in the data collection. Dr. Peter Crozier, from the High Resolution Electron Microscopy Center at Arizona State University, is thanked for his work on SSZ-35. P.W. thanks Dow Chemical Co. Foundation for a Dow Graduate Fellowship.
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Department of Energy (DOE)UNSPECIFIED
Dow Chemical Company FoundationUNSPECIFIED
Issue or Number:2
Record Number:CaltechAUTHORS:20170509-133036637
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Official Citation:Guest/Host Relationships in the Synthesis of the Novel Cage-Based Zeolites SSZ-35, SSZ-36, and SSZ-39 Paul Wagner, Yumi Nakagawa, Greg S. Lee, Mark E. Davis, Saleh Elomari, Ronald C. Medrud, and S. I. Zones Journal of the American Chemical Society 2000 122 (2), 263-273 DOI: 10.1021/ja990722u
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:77305
Deposited By: Tony Diaz
Deposited On:16 May 2017 22:02
Last Modified:15 Nov 2021 17:29

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