Noble gas encapsulated B₄₀ cage.

Area of Science:

• Computational Chemistry
• Materials Science
• Quantum Chemistry

Background:

• Borospherene (B₄₀) is a novel fullerene-like structure with potential applications.
• Noble gases (Ng) are generally unreactive, but their encapsulation in cages is of scientific interest.

Purpose of the Study:

• To investigate the feasibility of B₄₀ as a host for noble gas atoms.
• To explore the structural, energetic, and electronic properties of Ng@B₄₀ complexes.

Main Methods:

• Density Functional Theory (DFT) based computations were employed.
• Analysis of thermochemical stability, activation free energy barriers, and electronic interactions.

Main Results:

• Ng@B₄₀ complexes exhibit high activation free energy barriers, suggesting kinetic stability despite thermodynamic instability.
• Encapsulation of lighter noble gases (He, Ne) in B₄₀ is more favorable than in C₂₀H₂₀.
• Electron transfer from Ng to B₄₀ occurs, with electrostatic interactions being predominant but orbital interactions also significant.
• Dynamical behavior and potential for covalent interactions between encapsulated noble gas atoms were observed.
• Viable sandwich complexes involving B₄₀ and organometallic fragments were identified.

Conclusions:

• B₄₀ shows promise as a host for noble gas atoms, with potential for novel synthesis and applications.
• The high activation barriers indicate that Ng@B₄₀ complexes could be kinetically stable and experimentally observable.
• Further research into the synthesis and properties of these complexes is warranted.