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

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Zeolite NPO-Type Azolate Frameworks.

Xiangyi Zha¹, Xinhao Li¹, Abdulhadi A Al-Omari²

¹Shanghai Key Laboratory of High-Resolution Electron Microscopy, School of Physical Science and Technology, ShanghaiTech University, Shanghai, 201210, China.

Angewandte Chemie (International Ed. in English)

|June 29, 2022

Summary

This summary is machine-generated.

Researchers designed new zeolitic imidazolate frameworks (ZIFs) using a benzotriazolate linker to create three-membered rings. These novel ZIFs show promise for selective CO2 capture and ethane trapping.

Keywords:

Carbon Capture Gas Separation Porous Materials Reticular Chemistry Zeolitic Imidazolate Frameworks

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Area of Science:

Materials Science
Chemistry
Nanotechnology

Background:

Three-membered rings (3-rings) are crucial in zeolite chemistry but challenging to design intentionally.
Reticular chemistry often leads to serendipitous formation of 3-rings in zeolitic imidazolate frameworks (ZIFs).

Purpose of the Study:

To establish a design principle for the rational construction of ZIFs containing 3-rings.
To synthesize and characterize new ZIFs with a focus on 3-ring topology.

Main Methods:

Utilized tetrahedral Zn(II) centers, benzotriazolate (bTZ), and functionalized benzimidazolates (RbIM) as building blocks.
Employed a design strategy focusing on specific coordination angles and linker binding modes.
Characterized the resulting ZIFs, including ZIF-1001 to -1004, revealing a new NPO-type topology.

Main Results:

Successfully synthesized four new ZIFs (ZIF-1001 to -1004) incorporating 3-rings.
Identified that the ∠(T-bTZ-T) angle and RbIM's coordination preference were critical for 3-ring formation.
Demonstrated selective CO2 capture from humid flue gas and ethane trapping from shale gas.

Conclusions:

A predictable design principle for constructing 3-ring containing ZIFs has been established.
The new ZIFs exhibit significant potential for gas separation applications, particularly in challenging environments.