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Updated: Jul 30, 2026
08:15
Synthesis of Nine-atom Deltahedral Zintl Ions of Germanium and their Functionalization with Organic Groups
Published on: February 11, 2012
K(4)Au(TlSn(3)): A Novel Zintl Phase with an Anionic Chain.
Daping Huang1, John D. Corbett
1Ames Laboratory-DOE(1) and Department of Chemistry, Iowa State University, Ames Iowa 50011.
Inorganic Chemistry
|October 24, 2001
Summary
Researchers synthesized a novel black phase containing thallium, tin, and gold. Single-crystal X-ray analysis revealed infinite chains with a Zintl phase electron count, suggesting unique electronic properties.
Area of Science:
- Solid-state chemistry
- Inorganic materials synthesis
- Crystallography
Background:
- Zintl phases are known for their unique structures and electronic properties.
- Understanding the structure-property relationships in novel materials is crucial for materials science.
Purpose of the Study:
- To synthesize and characterize a novel black phase containing thallium, tin, and gold.
- To elucidate the crystal structure and bonding of the new phase.
- To investigate the electronic structure and properties of the synthesized material.
Main Methods:
- High-temperature reactions in tantalum containers.
- Single-crystal X-ray diffraction analysis.
- Computational studies of molecular orbitals and band structure.
Main Results:
- A novel black phase was successfully synthesized in good yield.
- Single-crystal X-ray characterization revealed a monoclinic structure (C2/c) with a novel infinite chain motif.
- The structure consists of tetrahedra of disordered Tl+3Sn bridged by four-bonded Au atoms, exhibiting a Zintl phase electron count.
- Computational analysis described the molecular orbitals of the chain fragment and the band structure, indicating a large electronic gap.
Conclusions:
- The synthesized black phase represents a new Zintl phase with a unique infinite chain structure.
- The electronic properties are influenced by the interplay between Au 6s orbitals and TlSn(3)(4)(-) units.
- This discovery opens avenues for exploring new materials with tailored electronic functionalities.
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