Double-Walled Mesoporous Hydrogen-Bonded Organic Frameworks with High Methane Storage Capacity

Area of Science:

• Materials Science
• Supramolecular Chemistry
• Nanotechnology

Background:

• Mesoporous hydrogen-bonded organic frameworks (HOFs) are crucial for applications but challenging to develop.
• Existing HOFs often lack sufficient pore size and stability for advanced applications.

Purpose of the Study:

• To synthesize and characterize a novel, robust mesoporous HOF with exceptionally large pores.
• To evaluate the methane storage performance of the newly developed HOF.

Main Methods:

• Synthesis of RP-H200 via π-π stacking and hydrogen bonding interactions.
• Characterization of framework structure, pore size (3.6 nm), and surface area (2313 m² g⁻¹).
• Methane storage capacity measurements at various temperatures and pressures.

Main Results:

• RP-H200 exhibits a unique double-walled, 2-fold interpenetrated structure.
• Achieved the largest pore size (3.6 nm) among reported HOFs.
• Demonstrated high methane storage capacities: 0.31 g g⁻¹ at 270 K/100 bar and 0.25 g g⁻¹ at 296 K/100 bar.

Conclusions:

• RP-H200 offers significant advancements in HOF design with its large mesoporosity and high surface area.
• Its excellent thermal stability and methane storage performance position it as a strong candidate for clean energy storage.
• The study highlights the potential of π-π stacking and hydrogen bonding for creating advanced porous materials.