Functional π-Conjugated Two-Dimensional Covalent Organic Frameworks

Area of Science:

• Materials Science
• Organic Chemistry
• Nanotechnology

Background:

• π-conjugated compounds are vital in nature and optoelectronics, with applications in OLEDs, OFETs, and OPVs.
• Extending π-delocalization to 2D is predicted to yield superior properties, but challenges existed in synthesizing such materials.
• Graphene, a 2D conjugated polymer, has limitations for semiconducting applications due to its zero-band-gap nature.

Purpose of the Study:

• To review the significance of 2D π-conjugated covalent organic frameworks (COFs).
• To highlight the advancements and novel functionalities achieved with these 2D π-conjugated COFs.
• To discuss their potential applications in various technological fields.

Main Methods:

• Exploration of boroxine/boronate ester linked covalent organic frameworks (COFs) as a route to 2D crystalline polymers.
• Development of π-conjugated COFs utilizing various organic building blocks and linkers, such as imine linkers.
• Characterization of the electronic and optical properties of synthesized 2D π-conjugated COFs.

Main Results:

• Covalent organic frameworks (COFs) provide a platform for creating 2D crystalline polymers with tunable π-conjugation.
• The introduction of π-delocalization promoting spacers has led to diverse COFs with intriguing electronic and optical properties.
• These 2D π-conjugated COFs demonstrate potential in gas storage, energy storage, catalysis, and sensing.

Conclusions:

• Two-dimensional π-conjugated COFs represent a significant advancement in materials science.
• Their unique properties open avenues for novel functionalities and applications.
• Continued research in 2D π-conjugated COFs promises further breakthroughs in optoelectronics and beyond.