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Open diamondoid amino-functionalized MOFs for CO2 capture.

Fei Wang¹, Yan-Xi Tan, Hui Yang

¹State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, The Chinese Academy of Sciences, Fuzhou, Fujian 350002, PR China.

Chemical Communications (Cambridge, England)

|April 17, 2012

Summary

Two isomeric metal-organic frameworks undergo a solvent-induced transformation from chiral to achiral single crystals. The resulting achiral form exhibits significant carbon dioxide uptake capacity, highlighting its potential for gas storage applications.

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Area of Science:

Materials Science
Crystallography
Chemistry

Background:

Metal-organic frameworks (MOFs) are porous crystalline materials with diverse applications.
Chirality in MOFs can influence their properties and applications.
Structural transformations in MOFs can lead to tunable functionalities.

Purpose of the Study:

To investigate solvent-induced structural transformations in amino-functionalized MOFs.
To explore the relationship between chirality and CO2 uptake in MOFs.
To synthesize and characterize MOFs with 2-fold interpenetrating diamond topology.

Main Methods:

Single-crystal X-ray diffraction to determine crystal structures.
Solvent vapor treatment to induce structural transformation.
Gas sorption analysis (CO2 uptake measurements).

Main Results:

Two isomeric amino-functionalized MOFs with 2-fold interpenetrating diamond topology were synthesized.
A solvent-induced chiral single-crystal to achiral single-crystal structural transformation was observed.
The achiral MOF form demonstrated a high CO2 uptake capacity.

Conclusions:

Solvent-induced transformations can alter the chirality and properties of MOFs.
The achiral MOF exhibits promising performance for CO2 capture.
This study provides insights into the design of functional MOFs through structural control.