Spherical Trihedral Metallo-Borospherene with Asymmetric Triangles in Boron Framework

Area of Science:

• Inorganic Chemistry
• Materials Science
• Nanotechnology

Background:

• Recent discovery of spherical trihedral metallo-borospherenes (Ln3B18-) introduces a new class of boron-metal nanomaterials.
• These nanomaterials feature heterogeneous lanthanide (Ln) or other metal atoms integrated into the boron cage surface.

Purpose of the Study:

• To theoretically predict and characterize novel cationic trihedral metallo-borospherenes.
• To explore the structural diversity and stability of these new boron-metal nanostructures.

Main Methods:

• Particle Swarm Optimization (PSO) algorithm used for global minimum structure prediction.
• Theoretical calculations to assess kinetic and thermodynamic stability of predicted isomers.

Main Results:

• The global minimum structure A1-Sc3B16+ was identified, featuring unequal B6 and B7 triangles in its boron framework.
• A second low-lying isomer, A2-Sc3B16+, was found with an asymmetric arrangement of boron rings and octacoordinated Sc atoms.
• Both predicted cationic isomers exhibit high kinetic and thermodynamic stability.

Conclusions:

• The study reveals novel geometric patterns in trihedral metallo-borospherenes, including unequal boron triangles and smaller odd-coordinated rings.
• These findings enrich the understanding of boron-metal binary nanomaterials and their structural possibilities.