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U60 (Li44K16[UO2(O2)(OH)]60, U60) and polymers are directionally enriched on the polymer surface by hydrogen bonding. In this part, we use several different polymers and U60 for self-assembly. The morphology and...

Two new organic–inorganic chlorocuprates(II), [(ClCH2)(CH3)3N]2CuCl4 (1), which contains a discrete [CuCl4]2− tetrahedron, and [(ClCH2)(CH3)3N]CuCl3 (2), which comprises one-dimensional [CuCl3]− chains of an edge-sharing CuCl5 pyramid, have been synthesized. Compound 1 exhibits a symmetry-breaking phase transition at 335.2 K, while 2 undergoes an isostructural phase transition at 333.8 K, as disclosed by differential scanning calorimetry measurements and variable-temperature X-ray diffraction analyses. The dielectric measurements reveal that both compounds 1 and 2 show prominent switchable dielectric activities between high and low dielectric states in the vicinity of the phase transition temperature. In addition, the contrast between the two dielectric states in 1 is much higher than that in 2, which is related to the more remarkable dynamic change of the [(ClCH2)(CH3)3N]+ cation in 1 during the phase transition process. It is believed that this work will pave a new avenue for the design of multifunctional phase transition materials by exploring the area of Cu2+-based organic–inorganic metal halides.

A layered organic-inorganic hybrid compound, tetra(cyclopentylammonium) decachlorotricadmate(II) (1), in which the two-dimensional [Cd3Cl10](4-)n networks built up from three face-sharing CdCl6 octahedra are separated by cyclopentylammonium cation bilayers, has been discovered as a new phase transition material. It undergoes two successive structural phase transitions, at 197.3 and 321.6 K, which were confirmed by differential scanning calorimetry measurements, variable-temperature structural analyses, and dielectric measurements. The crystal structures of 1 determined at 93, 298, and 343 K are solved in P2₁2₁2₁, Pbca, and Cmca, respectively. A precise analysis of the structural differences between these three structures reveals that the origin of the phase transition at 197.3 K is ascribed to the order-disorder transition of the cyclopentylammonium cations, while the phase transition at 321.6 K originates from the distortion of the two-dimensional [Cd3Cl10](4-)n network.