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Electrochemical polymerizatıon of hexachloroethane to form poly(hydridocarbyne): a pre-ceramic polymer for diamond production


Due to its structural similarity with diamond, poly(hydridocarbyne) (PHC), which is sp3-hybridized, is a unique polymer that can be easily converted to diamond and diamond-like-carbon ceramics upon heating. PHC can be easily synthesized via the electrochemical polymerization of chloroform as previously reported. Here, we report the electrosynthesis of PHC from hexachloroethane. Since hexachloroethane has six chlorine atoms in its structure, polymerization takes place through the carbons simultaneously. Thus, the polymer is bigger in chain length than PHC obtained from the polymerization of chloroform. UV-vis, FTIR, and NMR spectroscopy were utilized to determine the polymer structure. Conversion of the polymer to diamond was accomplished by heating at 1000 °C under a nitrogen atmosphere as confirmed by Optical Microscopy and Raman analysis. XRD studies showed that the product is an assortment of diamond forms.

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The authors would like to thank Mustafa Genişel for Raman analysis and discussions and to Dr. Ertuğrul Şahmetlioğlu for GPC analysis and to Mehmet Nur for his kind support to Middle East Technical University for financial support.

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Correspondence to Levent K. Toppare.

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Nur, Y., Cengiz, H.M., Pitcher, M.W. et al. Electrochemical polymerizatıon of hexachloroethane to form poly(hydridocarbyne): a pre-ceramic polymer for diamond production. J Mater Sci 44, 2774–2779 (2009).

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  • Diamond Film
  • Nuclear Magnetic Resonance Spectroscopy
  • LiAlH4
  • High Intensity Ultrasound
  • Hexachloroethane