Abstract
Pressure-dependent structural and chemical changes of the metal–organic framework (MOF) compound MIL-47(V) have been investigated up to 2.9 GPa using pore-penetrating liquid, water as pressure transmitting medium (PTM). Under compression, MIL-47(V) undergoes reversible replacement of the free terephthallic acid (TPA) by H2O molecules near 0.7 and 1.5 GPa. The observed structural and chemical changes observed in hydroxyl linked vanadium octahedra in as-synthesised MIL-47(V) demonstrate unique high pressure chemistry depending on the type of bridging octahedral group in framework structure. The tunable bridging group in MIL-47(V) allows postsynthetic room temperature by pressure-induced removal and insertion of organic molecules in MOFs through the formation of stable phases at ambient conditions.
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