B38: an all-boron fullerene analogue

Area of Science:

• Materials Science
• Computational Chemistry
• Nanotechnology

Background:

• Fullerene-like structures are typically carbon-based, with searches for analogues from other elements ongoing.
• Synthesizing all-boron fullerene-like structures presents significant challenges due to geometric complexities.

Purpose of the Study:

• To predict and characterize novel fullerene-like structures composed entirely of boron.
• To investigate the stability and properties of medium-sized boron clusters.

Main Methods:

• Utilizing first-principles swarm structure searching calculations.
• Analyzing the geometric symmetry, energetic favorability, and chemical stability of predicted structures.

Main Results:

• Prediction of a highly symmetric B38 fullerene analogue featuring 56 triangles and four hexagons.
• The B38 structure exhibits superior energetic stability over planar and tubular boron forms.
• Demonstrated high chemical stability with a large energy gap (~2.25 eV) and double aromaticity.

Conclusions:

• The discovered B38 cluster represents a significant advancement in understanding medium-sized boron cluster structures.
• The findings provide a crucial roadmap for the experimental synthesis of all-boron fullerene analogues.