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Neutral X-Site ABX3-Type Perovskites
Xiao-Gang Chen1, Yan Qin1, Yan-Ran Weng1
1Ordered Matter Science Research Center, Nanchang University, Nanchang, P. R. China.
Angewandte Chemie (International Ed. in English)
|May 7, 2026
Summary
Researchers developed a new class of perovskite materials using neutral molecules, expanding chemical flexibility and enabling tunable properties. These novel ABX3 perovskites with neutral X-sites offer new possibilities for advanced material functionalities.
Area of Science:
- Materials Science
- Solid-State Chemistry
- Crystallography
Background:
- Perovskite materials (ABX3) are known for diverse properties and chemical versatility.
- Existing perovskites primarily use ionic components at A-, B-, and X-sites.
- A need exists for expanding the chemical space of perovskites to unlock new functionalities.
Purpose of the Study:
- Introduce a novel subclass of three-dimensional ABX3 perovskites.
- Utilize neutral molecules as the X-site component.
- Investigate the structural and ferroelastic properties of these new materials.
Main Methods:
- Synthesis of novel ABX3 perovskites with neutral 1,4-dioxane as the X-site.
- Structural characterization of (PF6)Na(1,4-dioxane)3 and (ClO4)Ag(1,4-dioxane)3.
- Investigation of ferroelastic transitions using temperature-dependent studies.
Main Results:
- Demonstrated stable 3D perovskite frameworks with neutral X-sites within Goldschmidt tolerance.
- (PF6)Na(1,4-dioxane)3 exhibits a ferroelastic transition at 290 K.
- (ClO4)Ag(1,4-dioxane)3 shows successive ferroelastic transitions and switchable birefringence.
Conclusions:
- The introduction of neutral X-site molecules significantly expands chemical flexibility in ABX3 perovskites.
- This new subclass enables precise modulation of structural and functional properties.
- These findings open avenues for novel material functionalities and applications.
