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Pb12 2-: plumbaspherene.

Li-Feng Cui1, Xin Huang, Lei-Ming Wang

  • 1Department of Physics, Washington State University, 2710 University Drive, Richland, Washington 99354, USA.

The Journal of Physical Chemistry. A
|August 25, 2006
PubMed
Summary
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Researchers discovered a new lead cluster, plumbaspherene (Pb12 2-), which is a stable, icosahedral cage structure. This finding opens possibilities for new endohedral clusters with unique properties.

Area of Science:

  • Inorganic chemistry
  • Computational chemistry
  • Materials science

Background:

  • Silicon and germanium do not form empty cage clusters like fullerenes.
  • A unique 12-atom icosahedral tin cluster, stannaspherene (Sn12 2-), was recently discovered.
  • The stability and structure of group 14 element clusters are of significant interest.

Purpose of the Study:

  • To investigate the stability and structure of the lead cluster, Pb12 2-.
  • To determine the bonding characteristics of the Pb12 2- cluster.
  • To explore the potential of Pb12 2- as a host for endohedral clusters.

Main Methods:

  • Photoelectron spectroscopy was used to probe the electronic structure of Pb12 2-.
  • Theoretical calculations provided evidence for the icosahedral cage structure and bonding.

Related Experiment Videos

  • Comparison with the known stannaspherene (Sn12 2-) cluster.

    • Main Results:

    • Pb12 2- forms a highly stable icosahedral cage cluster, termed plumbaspherene.
    • The cluster is bonded by four delocalized radial pi bonds and nine delocalized on-sphere sigma bonds.
    • Plumbaspherene has a diameter of approximately 6.3 Å with a large internal cavity.
    • The cluster is predicted to be stable in solution and the solid state.

    Conclusions:

    • Pb12 2- is a stable, icosahedral cage cluster analogous to stannaspherene.
    • Plumbaspherene represents a new class of endohedral cluster precursors.
    • The empty interior of plumbaspherene can potentially host transition metal atoms.