On the question of metallic "poly(carbon diselenide)"

Y. Okamoto, L. S. Choi, Z. Iqbal, R. H. Baughman

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4 Scopus citations

Abstract

In 1982, we found that when carbon diselenide in organic solvents such as methylene chloride or dioxane was pressurized at about 5 Kbar and heated at 100°C for several hours, a black solid was obtained in >95% yield. The solid was amorphous and electrically insulating (<10-12 S cm-1), but when this compound was heated at 160 °C it was transferred to a different material which was found to be a semiconductor (10-3 S cm-1). In a series of recent papers, Kobayashi and coworkers have reported the synthesis of a metallic crystalline poly(carbon diselenide) via the pressurization and annealing of pure liquid CSe2 instead of its solution. Using a variety of techniques, we find that the metallic poly(carbon diselenide) synthesized is a mixture of an amorphous CSe polymeric material and trigonal selenium. Percolation of the CSe polymer probably provides the observed metallic conductivity of the material ({A figure is presented}. The relationship between structure and electrical properties of poly(carbon diselenide) prepared under various conditions is discussed.

Original languageEnglish (US)
Pages (from-to)265-275
Number of pages11
JournalSynthetic Metals
Volume18
Issue number1-3
DOIs
StatePublished - Feb 1987

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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