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Ionic Crystal Structures

Ionic Crystal Structures

Ionic crystals consist of two or more different kinds of ions that usually have different sizes. The packing of these ions into a crystal structure is more complex than the packing of metal atoms that are the same size.
Most monatomic ions behave as charged spheres, and their attraction for ions of opposite charge is the same in every direction. Consequently, stable structures for ionic compounds result (1) when ions of one charge are surrounded by as many ions as possible of the opposite...

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

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Published on: April 3, 2016

A new zeolitic lithium aluminum imidazolate framework.

Guangshen Jiang¹, Volodymyr Bon², Fei Xu¹

¹State Key Laboratory of Solidification Processing, School of Materials Science and Engineering, Northwestern Polytechnical University, Shaanxi Joint Laboratory of Graphene (NPU), Xi'an 710072, P. R. China. feixu@nwpu.edu.cn hongqiang.wang@nwpu.edu.cn and Department of Inorganic Chemistry, Technische Universität Dresden, Bergstrasse 66, 01062 Dresden, Germany. stefan.kaskel@tu-dresden.de.

Dalton Transactions (Cambridge, England : 2003)

|June 2, 2021

Summary

A new metal-organic framework, DUT-174, was synthesized using lithium aluminum hydride and 2-methylimidazole. This material exhibits a high surface area and significant carbon dioxide uptake capacity.

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Area of Science:

Materials Science
Chemistry
Nanotechnology

Background:

Metal-organic frameworks (MOFs) are porous materials with diverse applications.
Developing novel MOFs with enhanced properties is crucial for advancements in gas storage and separation.

Purpose of the Study:

To synthesize and characterize a novel aliovalent mixed-metal framework, DUT-174.
To evaluate the gas adsorption properties of DUT-174, particularly for carbon dioxide.

Main Methods:

Synthesis of DUT-174 via dehydrogenation of lithium aluminum hydride and 2-methylimidazole.
Characterization of the framework's structure and porosity.
Measurement of CO2 uptake at cryogenic temperatures (195 K).

Main Results:

Successful synthesis of DUT-174, isostructural to ZIF-8.
Achieved a high specific surface area of 1149 m2 g-1.
Demonstrated a CO2 uptake of 11.57 mmol g-1 at 195 K.

Conclusions:

DUT-174 is a promising new MOF material.
The framework's structure facilitates significant CO2 adsorption.
Potential applications in carbon capture and storage technologies.