Ferroelectric Transition in the Inorganic Supramolecular Complex (Hg₆P₄)(CuCl₃)₂

Abstract

In a state of disorder: An inorganic supramolecular complex, (Hg6P4)(CuCl3)2, was prepared that undergoes a ferroelectric transition at about 37 K, and its spontaneous polarization was determined to be about 114 μC m−2 in the polycrystalline form using the high‐precision pyroelectric current method. Weak electrostatic supramolecular interactions in 1 lead to the dynamic disorder of ions and ferroelectric transition.

EuSi7P10: An Inorganic Supramolecular Nonlinear Optical Crystal Exhibiting Strong Second-Harmonic Generation Response

“…However, it is shorter than the sum of the van der Waals radii of Eu and P atoms, which is 4.13 Å. These observations suggest the presence of typical electrostatic forces, or weak supramolecular interactions, between the host and guest frameworks. − In addition, there are two P atoms (P(1) and P(9)) coordinated with two Si atoms in EuSi 7 P 10 , while other P atoms coordinate with three Si atoms (Figure S3).…”

Polarization-driven catalysis via ferroelectric oxide surfaces

“…155,156 What makes ferroelectrics special is not merely the existence of a surface polarization but the fact that the polarization is a switchable order parameter [167][168][169][170][171][172] that couples to external fields. 33 We note that one reason we choose to study the polarization dependent chemistry of a ferroelectric oxide, rather than another type of ferroelectric, [173][174][175][176][177] is that oxygen activity on ferroelectric oxide surfaces can be tuned by the polarization which permits one to drive reduction or oxidation reactions effectively. 35 We believe that the possibility of using the polarization dependent chemistry of other classes of ferroelectrics to drive surface reactions is an intriguing direction for future work.…”

Hg5AsS2I3 – A Narrow‐Band‐Gap 2D Layered Compound with Different Trapped I– Anions

“…A large number of mercury pnictide halides have been reported. Interestingly, many of them exhibit characteristics to make them useful as semiconductors,1 in nonlinear optics,2 ferroelectric transitions,3 dielectric anisotropy,4 piezoelectric energy conversion,5b and so forth. As a result of the closed‐shell electronic configuration and large ionic radius of Hg with flexible coordination environments, mercury compounds present diverse molecular architectures 5…”