Microporous polyphenylenes with tunable pore size for hydrogen storage

Area of Science:

• Materials Science
• Polymer Chemistry
• Physical Chemistry

Background:

• Developing advanced porous materials is crucial for efficient gas storage applications.
• Understanding the interplay between material structure and gas adsorption is key to optimizing performance.

Purpose of the Study:

• To synthesize highly porous polymers with controlled pore sizes.
• To investigate the relationship between polymer surface properties and hydrogen adsorption capacity.

Main Methods:

• Facile ethynyl trimerization reaction for polymer synthesis.
• Brunauer-Emmett-Teller (BET) analysis to determine surface area.
• Gas adsorption isotherms to quantify hydrogen uptake.

Main Results:

• Polymers exhibited high BET surface areas exceeding 1000 m(2) g(-1).
• Tunable pore sizes were achieved, ranging from 0.7 nm to 0.9 nm.
• A clear correlation between pore size and hydrogen adsorption was demonstrated.

Conclusions:

• The synthesized polymers show promise for hydrogen storage applications.
• Surface properties, particularly pore size, significantly influence hydrogen adsorption.
• Ethynyl trimerization is an effective method for creating tailored porous polymers.