Highly Conducting Neutral Coordination Polymer with Infinite Two-Dimensional Silver–Sulfur Networks

Highly crystalline
films of a silver-based coordination polymer,
[Ag5(C6S6)]n (Ag-BHT, BHT = benzenehexathiol), have been prepared. The
structure of Ag-BHT, solved by combining rotation electron diffraction
and powder X-ray diffraction techniques, indicates that it has a lamellar
structure with alternatively stacked two-dimensional Ag–S networks
and layers composed of one-dimensional metal-dithiolene polymers.
In addition, the polycrystalline Ag-BHT film shows high electrical
conductivity of up to 250 S·cm–1 at 300 K.
The ultraviolet-photoelectron spectroscopy and electronic band structure
calculations reveal that this can be attributed to the partially filled
valence band and the unique two-dimensional Ag–S networks.