Origin of unusual spinel-to-layered phase transformation by crystal water

Origin of unusual spinel-to-layered phase transformation by crystal water† †Electronic supplementary information (ESI) available: Calculation details, intercalation geometries, interlayer distance. See DOI: 10.1039/c7sc04114d

Crystal-to-crystal transformation from a chain compound to a layered coordination polymer.

A crystal-to-crystal transformation was observed from a green chain compound CuBr2(1,4-dioxane)2(H2O)2 (1) to a brown layered compound (CuBr2)3(1,4-dioxane)2 (2). The hydrogen bond connecting chains in were replaced by a μ-Br bridge in and the antiferromagnetic interaction between the metal atoms in became stronger than in 1.

Reversible single-crystal to single-crystal polymorphic phase transformation of an organic crystal.

Two polymorphs of a substituted dihydroanthracene derivative were prepared by crystallization from different solvents. Each polymorph is reversibly interconvertible to the other by means of a single-crystal to single-crystal phase transformation.

Crystal-crystal phase transformation via surface-induced virtual premelting

A mechanism for crystal-crystal phase transformations (PTs) via surface-induced virtual premelting is justified thermodynamically and confirmed experimentally for the PTs in PbTiO3 nanofibers. When the thickness of the surface melt (which appears much below the melting temperature, especially for nanoobjects) exceeds the size of the critical product nucleus, nucleation and growth of the product...

Thickness-induced structural phase transformation of layered gallium telluride.

The thickness-dependent electronic states and physical properties of two-dimensional materials suggest great potential applications in electronic and optoelectronic devices. However, the enhanced surface effect in ultra-thin materials might significantly influence the structural stability, as well as the device reliability. Here, we report a spontaneous phase transformation of gallium telluride...