CIT-7, a crystalline, molecular sieve with pores bounded by 8 and 10-membered rings

Schmidt, Joel E.; Xie, Dan; Rea, Thomas; Davis, Mark E.

doi:10.1039/C4SC03935A

Title: CIT-7, a crystalline, molecular sieve with pores bounded by 8 and 10-membered rings

Journal Article · Fri Jan 23 00:00:00 EST 2015 · Chemical Science

DOI:https://doi.org/10.1039/C4SC03935A· OSTI ID:1215412

Schmidt, Joel E. ^[1]; Xie, Dan ^[2]; Rea, Thomas ^[2]; Davis, Mark E. ^[1]

California Inst. of Technology (CalTech), Pasadena, CA (United States)
Chevron Energy Technology Company, Richmond, CA (United States)

A new crystalline molecular sieve, denoted CIT-7, is synthesized using an imidazolium-based diquaternary organic structure directing agent (OSDA). The framework structure is determined from a combination of rotation electron diffraction and synchrotron X-ray powder diffraction data. The structure has 10 crystallographically unique tetrahedral atoms (T-atoms) in the unit cell, and can be described as an ordered arrangement of the [4²5⁴6²] mtw building unit and a previously unreported [4⁴5²] building unit. The framework contains a 2-dimensional pore system that is bounded by 10 T-atom rings (10-ring, 5.1 Å × 6.2 Å opening) that are connected with oval 8-rings (2.9 Å × 5.5 Å opening) through medium-sized cavities (~7.9 Å) at the channel intersections. CIT-7 can be synthesized over a broad range of compositions including pure-silica and heteroatom, e.g., aluminosilicate and titanosilicate, containing variants.

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Research Organization:: SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States). 2-1 Powder Diffraction Beamline at the Stanford Synchrotron Radiation Lightsource.

Sponsoring Organization:: USDOE Office of Science (SC)

Grant/Contract Number:: AC03-76SF00515

OSTI ID:: 1215412

Journal Information:: Chemical Science, Vol. 6, Issue 3; ISSN 2041-6520

Publisher:: Royal Society of ChemistryCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 33 works

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Targeted Synthesis of a Zeolite with Pre‐established Framework Topology Jo, Donghui; Hong, Suk Bong Angewandte Chemie, Vol. 131, Issue 39 https://doi.org/10.1002/ange.201909336	journal	July 2019
A Zeolite Family Nonjointly Built from the 1,3-Stellated Cubic Building Unit Jo, Donghui; Park, Gi Tae; Shin, Jiho Angewandte Chemie International Edition, Vol. 57, Issue 8 https://doi.org/10.1002/anie.201712885	journal	January 2018
Sustainable Synthesis of Pure Silica Zeolites from a Combined Strategy of Zeolite Seeding and Alcohol Filling Wu, Qinming; Zhu, Longfeng; Chu, Yueying Angewandte Chemie International Edition, Vol. 58, Issue 35 https://doi.org/10.1002/anie.201906559	journal	August 2019
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