Xenon in Rigid Oxide Frameworks: Structure, Bonding and Explosive Properties of Layered Perovskite K₄Xe₃O₁₂

Abstract

The tendency of high-valence xenon to form consolidated oxide structures is herein supported by the study of K4Xe3O12, the first example of a layered xenon perovskite. Xenon seems to be the only non-transition element which can adopt single-cation oxide perovskite frameworks. At the same time, peculiarities of electronic structure of xenon impose specific features on the bonding within a perovskite structure. Weak supramolecular interactions known as aerogen bonds are the linkers maintaining structural integrity of perovskite slabs in K4Xe3O12. The occurrence of aerogen bonding can provide an insight into the explosive properties of K4Xe3O12: the weakness of supramolecular interactions allows to consider them as possible trigger bonds responsible for the detonation sensitivity of layered xenon perovskite.

Not Only Hydrogen Bonds: Other Noncovalent Interactions

“…Remarkably, the authors showed that aerogen bonds are the NCIs that preserve the structural integrity of the perovskite. It is interesting to highlight that these compounds are explosive and the aerogen bonds have been proposed to be the trigger bonds responsible for the detonation [240,241].…”

Reversible Encapsulation of Xenon and CH2Cl2 in a Solid‐State Molecular Organometallic Framework (Guest@SMOM)

“…Xenon finds application in structural biology as a probe for solvent and gas channels in metalloenzymes, due to its high atomic number and hydrophobicity . It also shows binding affinity in supramolecular cages, oxide frameworks, MOFs, cryptophanes, and porous coordination‐complex salts; and has been widely used as an NMR probe for the determination of pore size in framework materials, due to the sensitivity of δ( 129 Xe) to its local environment…”

Reversible Encapsulation of Xenon and CH2Cl2 in a Solid‐State Molecular Organometallic Framework (Guest@SMOM)

“…[15] Interestingly the 31 P{ 1 H} SSNMR spectrum now shows sharp signals at d À23. [21] It also shows binding affinity in supramolecular cages, [22] oxide frameworks, [23] MOFs, [24] cryptophanes, [25] and porous coordinationcomplex salts; [26] and has been widely used as an NMR probe for the determination of pore size in framework materials, [27] due to the sensitivity of d( 129 Xe) to its local environment. This transformation is reversible,a nd when [20] V Xe /V cavity = 0.43).…”