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Enantiomerically enriched, polycrystalline molecular sieves

Journal Article · · Proceedings of the National Academy of Sciences of the United States of America
 [1];  [2];  [3];  [3];  [4];  [5];  [6];  [7]
  1. California Inst. of Technology (CalTech), Pasadena, CA (United States). Dept. of Chemical Engineering; California Institute of Technology
  2. California Inst. of Technology (CalTech), Pasadena, CA (United States). Dept. of Chemical Engineering; Univ. of Utrecht (Netherlands). Debye Inst. for Nanomaterials Science
  3. Rice Univ., Houston, TX (United States). Dept. of Bioengineering and Dept. of Physics and Astronomy
  4. ShanghaiTech Univ. (China). School of Physical Science and Technology
  5. ShanghaiTech Univ. (China). School of Physical Science and Technology; Stockholm Univ. (Sweden). Dept. of Materials and Environmental Chemistry
  6. California Inst. of Technology (CalTech), Pasadena, CA (United States). Dept. of Chemical Engineering; Stanford Univ., CA (United States). Dept. of Chemical Engineering
  7. California Inst. of Technology (CalTech), Pasadena, CA (United States). Dept. of Chemical Engineering
Zeolite and zeolite-like molecular sieves are being used in a large number of applications such as adsorption and catalysis. Achievement of the long-standing goal of creating a chiral, polycrystalline molecular sieve with bulk enantioenrichment would enable these materials to perform enantioselective functions. Here, we report the synthesis of enantiomerically enriched samples of a molecular sieve. For this study, enantiopure organic structure directing agents are designed with the assistance of computational methods and used to synthesize enantioenriched, polycrystalline molecular sieve samples of either enantiomer. Computational results correctly predicted which enantiomer is obtained, and enantiomeric enrichment is proven by high-resolution transmission electron microscopy. The enantioenriched and racemic samples of the molecular sieves are tested as adsorbents and heterogeneous catalysts. The enantioenriched molecular sieves show enantioselectivity for the ring opening reaction of epoxides and enantioselective adsorption of 2-butanol (the R enantiomer of the molecular sieve shows opposite and approximately equal enantioselectivity compared with the S enantiomer of the molecular sieve, whereas the racemic sample of the molecular sieve shows no enantioselectivity).
Research Organization:
Rice Univ., Houston, TX (United States)
Sponsoring Organization:
California Inst. of Technology (CalTech), Pasadena, CA (United States); Chevron Corporation, San Ramon, CA (United States); ShanghaiTech Univ. (China); USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Grant/Contract Number:
FG02-03ER15456
OSTI ID:
1429468
Journal Information:
Proceedings of the National Academy of Sciences of the United States of America, Journal Name: Proceedings of the National Academy of Sciences of the United States of America Journal Issue: 20 Vol. 114; ISSN 0027-8424
Publisher:
National Academy of Sciences, Washington, DC (United States)Copyright Statement
Country of Publication:
United States
Language:
English

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Zeolites and Other Micro‐ and Mesoporous Molecular Sieves book January 2019
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Regulating Nonclassical Pathways of Silicalite‐1 Crystallization through Controlled Evolution of Amorphous Precursors journal September 2019
Regulating Nonclassical Pathways of Silicalite‐1 Crystallization through Controlled Evolution of Amorphous Precursors journal September 2019
Influence of Flexibility on the Separation of Chiral Isomers in STW-Type Zeolite journal February 2018
Organic‐Free Interzeolite Transformation in the Absence of Common Building Units journal March 2019
Analysis of stereoisomers of chiral drug by mass spectrometry journal February 2018
Organic Mesopore Generating Agents (OMeGAs) for Hierarchical Zeolites: Combining Functions on Multiple Scales journal May 2019
Design of Organic Structure‐Directing Agents for the Controlled Synthesis of Zeolites for Use in Carbon Dioxide/Methane Membrane Separations journal December 2019
Design of Organic Structure Directing Agents for Chiral Zeolite Beta A journal March 2019
Self-assembly of chiral (1 R ,2 S )-ephedrine and (1 S ,2 S )-pseudoephedrine into low-dimensional aluminophosphate materials driven by their amphiphilic nature journal January 2018
A green route for the crystallization of a chiral polymorph A-enriched zeolite beta journal January 2018
Synthesis of STW zeolites using imidazolium-based dications of varying length journal January 2018
Synthesis of pure silica MFI zeolites using imidazolium-based long dications. A comparative study of structure-directing effects derived from a further spacer length increase journal January 2018
Identification of the key factor promoting the enrichment of chiral polymorph A in zeolite beta and the synthesis of chiral polymorph A highly enriched zeolite beta journal January 2018
Ultrafast synthesis of zeolites: breakthrough, progress and perspective journal January 2019
The Si–Ge substitutional series in the chiral STW zeolite structure type journal January 2018
Design of organic structure directing agents for polymorph A zeolite beta journal January 2019
Chiral zeolite beta: structure, synthesis, and application journal January 2019
Design of organic structure directing agents to control the synthesis of zeolites for carbon capture and storage journal January 2019
Continuous flow synthesis of ordered porous materials: from zeolites to metal–organic frameworks and mesoporous silica journal January 2019
In silico design of chiral dimers to direct the synthesis of a chiral zeolite journal July 2018
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Zeolite Synthesis Using Imidazolium Cations as Organic Structure-Directing Agents journal December 2019
The Si-Ge substitutional series in the chiral STW Zeolite Structure Type text January 2018

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