Abstract
Diisopropylammonium cation based single crystals with different counter anions (F−, Cl−, Br−, I−, NO-3, and CIO-4) were prepared. Their crystal structures and ferroelectric properties were investigated by single-crystal X-ray diffraction spectroscopy, differential scanning calorimetry, and dielectric measurements. The experimental results illustrate that the ferroelectric properties of diisopropylammonium-based single crystals are closely related to the electronegativity and structure of the counter anions. For monoatomic anions, higher electronegativity results in higher polarization and phase-transition temperature of the corresponding molecular–ionic ferroelectrics. The results of density-functional theory (DFT) calculations also support the experimental results.
| Original language | English |
|---|---|
| Article number | e201700029 |
| Journal | Physica Status Solidi (A) Applications and Materials Science |
| Volume | 214 |
| Issue number | 6 |
| DOIs | |
| State | Published - 1 Jun 2017 |
Keywords
- density-functional theory calculation
- diisopropylamine
- molecular ferroelectrics
- polarization