Hydrogen-bonded donor--acceptor compounds for organic ferroelectric materials

Area of Science:

• Materials Science
• Organic Electronics
• Supramolecular Chemistry

Background:

• Organic ferroelectrics are promising for electronic and optical applications.
• Few organic compounds exhibit ferroelectric transitions, limiting their use.
• Conventional ferroelectric design often uses asymmetric dipolar molecules.

Purpose of the Study:

• To explore novel design strategies for organic ferroelectrics.
• To investigate supramolecular systems utilizing non-covalent interactions.
• To demonstrate ferroelectricity and antiferroelectricity in hydrogen-bonded organic materials.

Main Methods:

• Focus on supramolecular systems of hydrogen-bonded acid and base molecules.
• Utilized 2,5-dihydroxy-p-benzoquinone derivatives and nitrogen-containing aromatic bases.
• Formation of hydrogen-bonded chains to induce proton transfer.

Main Results:

• Demonstrated ferroelectricity in the designed supramolecular systems.
• Observed a significant dielectric response.
• Induced antiferroelectric ordering through proton transfer within hydrogen-bonded chains.

Conclusions:

• Supramolecular design using hydrogen bonding is an effective strategy for organic ferroelectrics.
• The studied systems show potential for multifunctional organic electronic and optical devices.
• Proton transfer in hydrogen-bonded chains can lead to tunable ferroelectric and antiferroelectric properties.