High ionic conduction in a robust anionic metal-organic framework containing Mg²⁺ under guest vapors.

Area of Science:

• Materials Science
• Chemistry
• Electrochemistry

Background:

• Metal-organic frameworks (MOFs) are porous crystalline materials with diverse applications.
• Ionic conductivity in MOFs is crucial for energy storage and conversion devices.
• Developing MOFs with enhanced ionic transport properties remains an active research area.

Purpose of the Study:

• To synthesize a novel Mg2+-containing anionic MOF with Type A features.
• To investigate the ionic conductivity of the synthesized MOF material.
• To explore the potential of this MOF for electrochemical applications.

Main Methods:

• Ion exchange reaction was employed for the synthesis of the MOF.
• The synthesized MOF was characterized for its crystallinity and composition.
• Ionic conductivity measurements were performed under specific conditions (25 °C, MeCN vapor).

Main Results:

• A highly crystalline Mg2+-containing anionic MOF, denoted as Mg[Zr(C14H3O8)2] (SU-102-Mg), was successfully synthesized.
• SU-102-Mg exhibited a high ionic conductivity of 3.6 × 10^-5 S cm^-1.
• The material possesses a Type A feature, with Mg2+ acting as a counter cation within the anionic framework.

Conclusions:

• The successful synthesis of SU-102-Mg demonstrates a viable route to creating Mg2+-containing anionic MOFs.
• The observed high ionic conductivity highlights the potential of SU-102-Mg as an electrolyte material.
• This study contributes to the development of advanced MOFs for electrochemical applications.