Triptycene-Based Microporous Polymers: Synthesis and Their Gas Storage Properties

Area of Science:

• Materials Science
• Polymer Chemistry
• Chemical Engineering

Background:

• Microporous polymers are crucial for gas storage and separation.
• Triptycene units offer unique structural rigidity and porosity.
• Efficient synthesis of novel triptycene-based polymers is needed.

Purpose of the Study:

• To synthesize novel triptycene-based microporous polymers (STPs).
• To evaluate the gas adsorption properties of the synthesized STPs.

Main Methods:

• Synthesis of STPs via nickel(0)-catalyzed Ullmann cross-coupling reactions.
• Characterization of STPs using BET surface area analysis.
• Measurement of hydrogen (H2) and carbon dioxide (CO2) adsorption.

Main Results:

• Successfully synthesized two novel STPs, STP-I and STP-II.
• Achieved high BET surface areas of 1305 m² g⁻¹ for STP-I and 1990 m² g⁻¹ for STP-II.
• Demonstrated significant reversible adsorption capacities: 1.60 wt% H2 and 16.15 wt% CO2 for STP-I; 1.93 wt% H2 and 18.20 wt% CO2 for STP-II.

Conclusions:

• The novel STPs possess excellent porosity and gas adsorption capabilities.
• These triptycene-based polymers are promising materials for hydrogen and carbon dioxide storage.