EVIDENCES ABOUT CARBYNE FORMATION TOGETHER WITH OTHER CARBONACEOUS MATERIAL BY THERMAL DECOMPOSITION OF DIIODOACETYLENE

Carbonaceous matter containing carbyne has been synthesized by thermal decomposition of diiodoacetylene in boiling xylene or in o-dichlorobenzene. FT-IR and Raman spectroscopy together with powder x-ray diffraction were used to study the structure of the decomposition products and to identify the presence of carbyne domains. Together with carbyne domains, amorphous carbon was produced having residual iodine in its structure as shown by TGA-DTA. Additionally a crystalline charge-transfer complex between diiodoacetylene and o-dichlorobenzene has been identified. Thermodynamic calculations were performed in order to better understand the possible decomposition pattern from diiodoacetylene.