Communication
ChemComm
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22 A. A. Lysova, D. G. Samsonenko, P. V. Dorovatovskii, V. A. Lazarenko,
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noting that the images collected in the vertical and lateral
modes are entirely different. Besides, there scarcely exists any
correlation between the phase images and the topography.
Hence, these phenomena indicate the emergence of non-1801
domains and the characteristics of multiaxial ferroelectricity,
which agrees with the Aizu notation of 4/mmmFmm2 and is an
essential property for practical applications in flexible devices.
Besides, the conventional hysteresis loops and the butterfly
curves are also convincing proof of the switchable ferroelectric
domains.
In summary, we successfully modulated the intermolecular
interaction and designed an ultra-high Tc (540 K) molecular
ferroelectric through H/F substitution, [FEtDabco]ZnI3, which
shows sensational features of multiaxial ferroelectricity. This
characteristic and the high Tc make this compound a potential
candidate for practical application as a ferroelectric under
extreme conditions. Compared to perovskite and some zero-
dimensional structures, where the organic components are
isolated with the inorganic salt, the metal coordinated with
the well modified amine might make more contributions for
the enhancement of Tc. What’s more, the design method and
the modulation towards intermolecular interaction take full
advantage of the flexibility of the building blocks, which is
promising for further design of high performance ferroelec-
trics. We forecast that this work will propel the enrichment of
more creationary modification methods, and boost the vigor-
ous development of related fields, like NVMs, sensors and
flexible materials.
This work was financially supported by the National Natural
Science Foundation of China (21671084).
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Conflicts of interest
There are no conflicts to declare.
27 Y. Xie, Y. Ai, Y.-L. Zeng, W.-H. He, X.-Q. Huang, D.-W. Fu, J.-X. Gao,
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946 | Chem. Commun., 2021, 57, 943--946
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