Photoelectron spectroscopy and density functional theory study of Bi2Aln− (n = 1-4) clusters

- Structural and electronic properties of Bi2Aln− (n = 1-4) clusters are studied with PES and DFT methods.
- The Bi2Al3− anion is a specially stable cluster with larger VDE and ADE.
- The Bi2Aln− (n = 1-4) anions all have a Bi2 unit inside their structures.
- The negative charge distributes mainly on the Bi2 unit in the Bi2Aln− (n = 1-4) clusters.