Porous organic crystals crosslinked by free-radical reactions

Area of Science:

• Materials Science
• Organic Chemistry
• Crystallography

Background:

• Hydrogen-bonded crosslinked organic frameworks (H_COFs) offer tunable properties for advanced applications.
• Achieving high crystallinity in H_COFs is crucial for detailed structural analysis and property prediction.

Purpose of the Study:

• To synthesize novel H_COFs with high crystallinity.
• To explore the chemical modification of H_COFs while preserving their structural integrity.

Main Methods:

• Free radical polymerization using butadiene and isoprene as crosslinkers.
• Single-crystal X-ray diffraction for structural characterization.
• Hydroboration-oxidation reaction for framework functionalization.

Main Results:

• Two crystalline H_COFs were successfully synthesized.
• Detailed structural information was obtained via X-ray diffraction.
• An olefin-rich H_COF was converted to a hydroxylated framework, retaining high crystallinity.

Conclusions:

• The synthesis of crystalline H_COFs is feasible using readily available monomers.
• Chemical modification of H_COFs can be achieved without compromising crystallinity.
• These findings open avenues for designing functional porous materials.