Module-Patterned Polymerization towards Crystalline 2D sp2 -Carbon Covalent Organic Framework Semiconductors
Enquan Jin1,2, Keyu Geng1, Shuai Fu2
1Department of Chemistry, Faculty of Science, National University of Singapore, 3 Science Drive 3, Singapore, 117543, Singapore.
Angewandte Chemie (International Ed. in English)
|December 21, 2021
Summary
Researchers developed a new module-patterned polymerization method to create crystalline covalent organic frameworks, overcoming challenges in amorphous polymer synthesis and enabling diverse, functional materials.
Area of Science:
- Materials Science
- Polymer Chemistry
- Organic Chemistry
Background:
- Synthesizing crystalline covalent organic frameworks (COFs) via polycondensation is challenging, often yielding amorphous polymers.
- Structural variations in building units typically fail to produce the desired crystalline order.
Purpose of the Study:
- To develop an efficient and designed synthesis strategy for crystalline porous polymeric frameworks.
- To overcome the limitations of current polycondensation methods in achieving crystalline COFs.
Main Methods:
- Module-patterned polymerization approach.
- Utilizing C=C bond-formation polycondensation reactions.
- Employing diverse building units and linkers.
Main Results:
- Achieved efficient and designed synthesis of novel crystalline 2D polymers and frameworks.
- Demonstrated wide applicability with various building units and linkers.
- Synthesized sp2-carbon frameworks with high emission, up-conversion luminescence, tunable low band gap semiconducting properties, and ultrahigh charge mobilities.
Conclusions:
- Module-patterned polymerization offers a versatile strategy for creating crystalline porous organic materials.
- The synthesized frameworks exhibit promising optoelectronic properties for advanced applications.
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