Aminobenzoic Acid Covalently Modified Polyoxotungstates Based on {XW₆} Clusters with Proton Conductivity Property

Area of Science:

• Inorganic Chemistry
• Materials Science
• Supramolecular Chemistry

Background:

• Polyoxotungstates (POMs) are versatile inorganic clusters with diverse applications.
• Hybrid materials combining POMs with organic ligands offer tunable properties.
• Proton conductivity in materials is crucial for energy applications like fuel cells.

Purpose of the Study:

• To synthesize and characterize novel aminobenzoic acid hybrid polyoxotungstates.
• To investigate the structural features contributing to material stability and conductivity.
• To elucidate the proton transport mechanisms within these hybrid materials.

Main Methods:

• Solvothermal synthesis of three distinct polyoxotungstate hybrids.
• Single-crystal X-ray diffraction for structural determination.
• Hirshfeld partition analysis to understand intermolecular interactions.
• Proton conductivity measurements.

Main Results:

• Successful synthesis of three aminobenzoic acid-based polyoxotungstate hybrids.
• Characterization of a common hexanuclear {XW6} core structure.
• Observation of extensive 3D hydrogen-bonding networks.
• Demonstration of high thermal stability and excellent proton conductivity.

Conclusions:

• The novel hybrid polyoxotungstates are successfully synthesized and structurally characterized.
• The integrated hydrogen-bonding network is key to the enhanced thermal stability and proton conductivity.
• Understanding proton transport mechanisms provides insights for designing advanced proton conductors.