Polythiazyl
From Infogalactic: the planetary knowledge core
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| Names | |
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| Other names
polythiazyl
poly(sulfur nitride) |
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| Identifiers | |
56422-03-8  |
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| Properties | |
| (SN)x | |
| Appearance | bronze colour, metallic lustre[1] |
| Vapor pressure | {{{value}}} |
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Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Polythiazyl (polymeric sulfur nitride), (SN)x, is an electrically conductive, gold- or bronze-colored polymer with metallic luster. It was the first conductive inorganic polymer discovered,[1] and was also found to be a superconductor at very low temperatures (below 0.26 K).[2][3]
Structure and bonding
Several resonance structures can be written:[4]
Synthesis
Polythiazyl is synthesized by the polymerization of the dimer disulfur dinitride (S2N2), which is in turn synthesized from the cyclic alternating tetramer tetrasulfur tetranitride (S4N4). Conversion from cyclic tetramer to dimer is catalized with hot silver wool.[1][5]
- S4N4 + 8 Ag → 4 Ag2S + 2 N2
- S4N4 (w/ Ag2S catalyst) → 2 S2N2 (w/ 77K cold finger) → S2N2
- S2N2 (@ 0°C, sublimes to surface) → thermal polymerization → (SN)x
Uses
Due to its electrical conductivity, polythiazyl is used in LEDs, transistors, battery cathodes, and solar cells.[5]
References
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