Metal–organic frameworks are a class of compounds composed of metal ions linked via organic bridging ligands to form three-dimensional porous networks. The exceptional ability of these materials to adopt ordered structures with distinct pore sizes and chemical environments provides an innovative route towards the synthesis and stabilization of inorganic clusters within a three-dimensional support. Analogous to how biological and molecular scaffolds template the formation of well-defined inorganic clusters, a metal–organic framework furnished with coordinating bipyridine sites can facilitate the nucleation, growth, and confinement of discrete metal(ii) halide sheets, which represent a fragment of a single layer of the bulk metal(ii) halide structure. Crystallographic characterization by single-crystal X-ray diffraction provides insight on the structure and mechanism of formation of these sheets. While magnetic measurements and Mössbauer spectroscopy reveal that these isolated sheets exhibit properties distinct from the bulk metal halides.

Confinement of atomically-defined metal halide sheets in a metal–organic framework

2019 Fall National Meeting

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