Polythiazyl

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Polythiazyl (or Polysulfur nitride), created in 1974, was the first conducting inorganic polymer. In addition to being an electrical conductor, it was also found to be a superconductor at very low temperatures (0.2 K).

Polythiazyl is synthesized from tetrasulfur tetranitride (S₄N₄) in the following way:

S₄N₄ + 8Ag → Ag₂S + 2N₂

S₄N₄ (w/ Ag₂S catalyst) → 2S₂N₂ (w/ 77K cold finger) → S₂N₂

S₂N₂ (@ 0°C, sublimes to surface) → thermal polymerization → (SN)_x