Direct Synthesis of a Covalent Triazine-Based Framework from Aromatic Amides
Soo-Young Yu1, Javeed Mahmood1, Hyuk-Jun Noh1
1School of Energy and Chemical Engineering, Center for Dimension-Controllable Organic Frameworks, Ulsan National Institute of Science and Technology (UNIST), 50 UNIST, Ulsan, 44919, Republic of Korea.
Angewandte Chemie (International Ed. in English)
|April 7, 2018
Summary
Researchers developed a new method using phosphorus pentoxide (P2O5) to create crystalline covalent triazine-based frameworks (CTFs). This process yields materials with high surface area and excellent CO2 and H2 uptake capabilities.
Area of Science:
- Materials Science
- Organic Chemistry
- Nanotechnology
Background:
- Covalent triazine-based frameworks (CTFs) are extensively researched for various applications.
- Existing synthesis methods often involve aromatic nitriles.
Purpose of the Study:
- To develop a novel, efficient synthesis route for crystalline CTFs.
- To explore the use of aromatic amides as precursors for CTF formation.
- To characterize the properties and gas uptake capacities of the synthesized CTF.
Main Methods:
- Phosphorus pentoxide (P2O5)-catalyzed direct condensation of aromatic amides.
- Application of the method to terephthalamide to synthesize pCTF-1.
- Characterization of pCTF-1's crystallinity, surface area, and gas adsorption.
- Model reactions using benzamide and benzonitrile to confirm triazine ring formation.
Main Results:
- Successfully synthesized highly crystalline pCTF-1 using terephthalamide.
- Achieved a high specific surface area of 2034.1 m²/g for pCTF-1.
- Demonstrated high CO2 uptake (21.9 wt% at 273 K) and H2 uptake (1.75 wt% at 77 K) capacities.
- Confirmed the direct formation of triazine-based covalent organic frameworks (COFs) via model reactions.
Conclusions:
- P2O5-catalyzed condensation of aromatic amides is a viable and effective method for synthesizing crystalline CTFs.
- The synthesized pCTF-1 exhibits promising properties for gas storage applications.
- This approach offers a new pathway for designing and producing advanced porous materials.
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