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Effect of counter anions on ferroelectric properties of diisopropylammonium‐cation based molecular crystals
Author(s) -
Jiang Chunli,
Tong WenYi,
Lin Hechun,
Luo Chunhua,
Peng Hui,
Duan ChunGang
Publication year - 2017
Publication title -
physica status solidi (a)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.532
H-Index - 104
eISSN - 1862-6319
pISSN - 1862-6300
DOI - 10.1002/pssa.201700029
Subject(s) - electronegativity , ferroelectricity , differential scanning calorimetry , dielectric , density functional theory , crystallography , single crystal , ionic bonding , materials science , phase transition , crystal (programming language) , chemistry , ion , analytical chemistry (journal) , computational chemistry , condensed matter physics , thermodynamics , organic chemistry , physics , optoelectronics , computer science , programming language
Diisopropylammonium cation based single crystals with different counter anions (F − , Cl − , Br − , I − ,N O 3 − , andC l O 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.