Marcos orgánicos covalentes 2D monocristalinos para almacenamiento de metano de alta capacidad

Área de la Ciencia:

• Materials Science
• Chemistry

Sus antecedentes:

• 2D covalent organic frameworks (COFs) typically exhibit limited porosity and surface area compared to their 3D counterparts, hindering their use in gas storage.
• Polycrystalline nature of 2D COFs further restricts their performance.

Objetivo del estudio:

• To design and synthesize robust single-crystal 2D COFs with enhanced porosity and surface area.
• To investigate the impact of interlayer stacking engineering on COF properties for gas storage applications.

Principales métodos:

• A substituent strategy was employed to create three single-crystal 2D COF isomers.
• Atom-resolution structures were determined using 3D electron diffraction.
• Brunauer-Emmett-Teller (BET) surface area and pore volume were measured for desolvated GZU-1.

Principales resultados:

• Three robust single-crystal 2D COF isomers were successfully synthesized.
• Precise engineering of interlayer distance in GZU-1 resulted in a BET surface area of ~2100 m² g⁻¹ and a pore volume of 1.40 cm³ g⁻¹.
• GZU-1 exhibited a volumetric methane uptake of 240 cm³ (STP) cm⁻³ at 273 K and 100 bar, outperforming other 2D COFs and comparable to 3D MOFs.

Conclusiones:

• Interlayer stacking regulation is a viable strategy for designing highly porous single-crystal 2D COFs.
• The developed 2D COFs show significant potential for advanced gas storage applications.