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Enhancing switchable dielectric property for crystalline supramolecular rotor compounds by adding polar components
Rui-Kang Huang1, Xiao-Xian Chen1, Zhi-Feng Xiao1
1MOE Key Laboratory of Bioinorganic and Synthetic Chemistry, School of Chemistry, Sun Yat-Sen University, Guangzhou 510275, P. R. China. zhangw6@mail.sysu.edu.cn.
Chemical Communications (Cambridge, England)
|March 13, 2020
Summary
Two new compounds featuring a specific cation and different anions were synthesized. The compound with a polar anion exhibited enhanced dielectric switching during phase transition, showing a strategy for improving dielectric properties.
Area of Science:
- Materials Science
- Solid-State Chemistry
Background:
- Dielectric materials are crucial for electronic devices.
- Tuning dielectric properties through molecular design is an active research area.
Purpose of the Study:
- To synthesize and characterize new compounds with a [(2-methoxy-5-nitro-anilinium)(18-crown-6)]+ cation.
- To investigate the influence of different anions (PF6- and SO3CF3-) on the dielectric properties of these compounds.
Main Methods:
- Crystallization and characterization of two new ionic compounds.
- Analysis of dielectric switching behavior during phase transitions.
Main Results:
- Successful synthesis of two novel compounds: [(2-methoxy-5-nitro-anilinium)(18-crown-6)]+PF6- and [(2-methoxy-5-nitro-anilinium)(18-crown-6)]+SO3CF3-.
- The SO3CF3- containing compound demonstrated significantly enhanced dielectric switching behavior compared to the PF6- analog.
- This enhancement is attributed to the presence of the polar SO3CF3- anion.
Conclusions:
- The incorporation of polar anions is an effective strategy to improve the dielectric switching properties of materials.
- These findings offer insights into the rational design of advanced dielectric materials.
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