Journal
CHEMISTRYSELECT
Volume 4, Issue 10, Pages 2903-2907Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/slct.201900081
Keywords
ferroelectric; piperidine-4-ylmethanaminium; switchable dielectric; phase transition; hysteresis loop
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Funding
- National Natural Science Foundations of China [11574138, 21427801, 11874200]
- Top-Notch Young Talents Program of China
- National Key R&D Program of China [2016YFA0201104]
- Dengfeng Project B of Nanjing University
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A new piperidyl-based molecular ferroelectric piperidine-4-ylmethanaminium perchlorate (compound 1) has been successfully synthesized, which undergoes a reversible phase transition around T-c = 258.8 K. The spontaneous polarization of compound 1 is about 0.63 mu C/cm(2) and coercive field as small as 1.14 kV/cm at 192 K. The variable-temperature single-crystal X-ray diffraction reveals that the space group transforms from a polar space group of P2(1) at 173 K to a centrosymmetric space group of P2(1)2(1)2(1) at 293 K. Especially, the dielectric anomaly at the phase transition temperature increases more than 4 times, which indicates potential applications in switchable dielectric devices.
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