Abstract
The cover picture shows a new molecular ferroelectrics design method based on anions. Using sphere‐like cyclopentylamine as the cation can obtain a switchable dielectric compound (CPA)2ZnBr4 (CPA+ is cyclopentylammonium cation) with high phase transition temperature (407 K) and excellent dielectric reversibility. To further induce ferroelectricity, we focused on anions that have received less attention. The new organic‐inorganic molecular ferroelectric (CPA)2CuBr4 (Tc of 393 K and a saturated polarization of 0.12 μC/cm2) was successfully obtained by introducing twisted [CuBr4]2– tetrahedra instead of the highly symmetric [ZnBr4]2– to reduce the symmetry slightly. More details are discussed in the article by Chen and Li et al. on page 2226—2231.image
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