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Updated: Sep 20, 2025

From Molecules to Materials: Engineering New Ionic Liquid Crystals Through Halogen Bonding
Published on: March 24, 2018
Ferroelectricity and phase transition of halide solid-solution dabcoH(BrxI1-x)
Yuki Ohishi1, Junya Fujiwara1, Atsuko Masuya-Suzuki1,2,3
1Graduate School of Sciences and Technology for Innovation, Yamaguchi University, Yoshida 1677-1, Yamaguchi, 753-8512, Japan. ryotsuna@yamaguchi-u.ac.jp.
None:
The temperature and composition dependence of the ferroelectric and structural phase transition behaviours of hydrogen-bonding molecular relaxor dabcoHX (X = Br, I) were investigated using a halide solid-solution, dabcoH(BrxI1-x). A typical relaxor ferroelectric type polarisation-electric field relationship was observed with increases in temperature and Br-content. In addition, the phase transition temperature depends on the composition, and the structure of I-rich solid-solutions changed reversibly back to a hydrogen-bonded hexagonal phase after heating. These results demonstrated the tuning of relaxor ferroelectrics by tuning the ratio of Br and I ions in the one-dimensional dabco-based hydrogen bonding system.
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