Pillar[5]arene-based ionic single crystals formed by dual self-assemblies through host-guest and ionic interactions...

Area of Science:

• Materials Science
• Supramolecular Chemistry
• Crystal Engineering

Background:

• Pillar[5]arene macrocycles are versatile molecular building blocks.
• Developing advanced porous materials for gas adsorption is crucial.
• Controlling self-assembly in crystalline materials is a key challenge.

Purpose of the Study:

• To report the first synthesis of an ionically crosslinked pillar[5]arene single-crystal material.
• To investigate the self-assembly structure of the new material.
• To evaluate the material's performance for iodine vapor adsorption.

Main Methods:

• Ionic crosslinking of pillar[5]arene units.
• Single-crystal X-ray diffraction to determine structure.
• Iodine vapor adsorption isotherms measurement.

Main Results:

• Successful preparation of a novel ionically crosslinked pillar[5]arene single-crystal material, designated DMIBP5-NA.
• The material exhibits a unique dual self-assembly structure.
• DMIBP5-NA demonstrated excellent iodine vapor adsorption capacity, reaching an equilibrium adsorption of 3.28 g g^-1.

Conclusions:

• The study presents a new class of ionically crosslinked pillar[5]arene materials.
• The dual self-assembly structure is key to its adsorption properties.
• DMIBP5-NA shows significant potential for iodine vapor capture applications.