A Nickel(II) Nitrite Based Molecular Perovskite Ferroelectric

Area of Science:

• Materials Science
• Solid-State Chemistry
• Crystallography

Background:

• Organic-inorganic hybrid perovskites (OHPs) utilize diverse X-site ions, including halides and linkers like formate, azide, nitrite, and cyanide.
• Ferroelectric OHPs are crucial for electronic applications, but nitrite-based ferroelectric OHPs remain underexplored.
• Existing non-ferroelectric nitrite compounds provide a basis for designing new ferroelectric materials.

Purpose of the Study:

• To synthesize and characterize the first nitrite-based organic-inorganic hybrid perovskite (OHP) ferroelectric.
• To investigate the ferroelectric properties and phase transition behavior of the novel material.
• To expand the family of molecular ferroelectrics and explore potential applications.

Main Methods:

• Synthesis of [FMeTP][Ni(NO2)3] using quasi-spherical shape, hydrogen bonding, and H/F substitution strategies.
• Characterization of the material's structure and ferroelectric phase transition.
• Analysis of the ferroelectric behavior using Aizu notation (6/mmmFm) and identification of multiaxial characteristics.

Main Results:

• Successful synthesis of [FMeTP][Ni(NO2)3], the first reported nitrite-based OHP ferroelectric.
• Observation of a ferroelectric phase transition at 400 K.
• Demonstration of multiaxial ferroelectric characteristics with 6/mmmFm symmetry.

Conclusions:

• The development of [FMeTP][Ni(NO2)3] represents a significant advancement in nitrite-based OHP ferroelectrics.
• This discovery enriches the landscape of molecular ferroelectrics.
• The material shows promise for future practical applications in electronics.