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Updated: May 29, 2026

Synthesis of Zeolites Using the ADOR (Assembly-Disassembly-Organization-Reassembly) Route
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Atomic Imaging of Ion-Triggered Flexibility and Local Electric Field Response in Zeolite Rings.

Qiang Chen1, Zhao-Bin Ding1, Pengfei Cao2,3

  • 1School of Chemical Engineering and Technology, Institute of Green Chemistry and Molecular Engineering, Sun Yat-sen University, Zhuhai 519082, P. R. China.

Journal of the American Chemical Society
|May 27, 2026
PubMed
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This summary is machine-generated.

Ion-exchange tuning zeolite flexibility allows for selective adsorption. This study visualizes ion-induced framework distortions in MFI zeolites, revealing how electric fields from ions like Barium (Ba2+) alter pore geometry for enhanced CO2 separation.

Area of Science:

  • Materials Science
  • Chemistry
  • Nanotechnology

Background:

  • Zeolite flexibility, controlled by ion-exchange, influences guest species interactions in adsorption and catalysis.
  • Direct observation of ion-induced local atomic structure deformation in zeolites has been challenging.

Purpose of the Study:

  • To directly observe and quantify microscopic ring flexibility in ion-exchanged MFI zeolites.
  • To correlate ion-induced electric field alterations with framework distortions and pore geometry changes.
  • To elucidate the fundamental relationship between confined ions and the zeolite's atomic microenvironment.

Main Methods:

  • Atomic-resolution imaging to observe microscopic ring flexibility.
  • Differential phase contrast imaging to visualize the coupling between confined ions and the MFI framework's electric field.

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Adsorption Device Based on a Langatate Crystal Microbalance for High Temperature High Pressure Gas Adsorption in Zeolite H-ZSM-5
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Adsorption Device Based on a Langatate Crystal Microbalance for High Temperature High Pressure Gas Adsorption in Zeolite H-ZSM-5

Published on: August 25, 2016

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Last Updated: May 29, 2026

Synthesis of Zeolites Using the ADOR (Assembly-Disassembly-Organization-Reassembly) Route
08:26

Synthesis of Zeolites Using the ADOR (Assembly-Disassembly-Organization-Reassembly) Route

Published on: April 3, 2016

Adsorption Device Based on a Langatate Crystal Microbalance for High Temperature High Pressure Gas Adsorption in Zeolite H-ZSM-5
09:46

Adsorption Device Based on a Langatate Crystal Microbalance for High Temperature High Pressure Gas Adsorption in Zeolite H-ZSM-5

Published on: August 25, 2016

  • Theoretical analysis based on structure and charge distribution to determine bond angle deformations.

    • Main Results:

    • Extra-framework Ba2+ ions induced a 0.5 Å channel expansion in 10-membered rings (10-MRs), significantly more than Na+ (0.2 Å).
    • The electric field generated by Ba2+ caused an 8° deformation in T-O-T bond angles, distorting the 10-MR while maintaining macroscopic rigidity.
    • Ion-exchange-driven 10-MR flexibility was confirmed by enhanced CO2 adsorption and separation.

    Conclusions:

    • Ion-exchange-induced electric fields are the primary drivers of local framework distortions and pore size changes in zeolites.
    • This study provides direct visualization and quantification of ion-framework interactions, resolving long-standing questions about ion-exchange effects.
    • The findings offer critical insights into electric field-driven dynamics in zeolites, with implications for selective adsorption and catalysis.