Extended polymerization in ABC-stacked C-70 fullerite

resumo

This letter reports on the extended polymerization occurring in ABC-stacked C-70 fullerite, which up to now was thought to occur only in the AB-stacked phase. Frustration effects on ABC close-packing of C-70 molecules were believed to prevent extended polymerization based on 2 + 2 cycloaddition bonds, but here we show that an extended polymeric phase is obtained at 10 GPa and 270 degrees C. Its structure, obtained by Rietveld analysis of the X-ray diffraction data combined with density functional theory methods, consists of zigzag chains running within the dense hexagonal (101) pyramidal planes. (C) 2014 Elsevier Ltd. All rights reserved.

palavras-chave

PHOTOINDUCED POLYMERIZATION; PHASE-TRANSITIONS; SOLID C-70; C-60; POLYMERS; FILMS

categoria

Chemistry; Materials Science

autores

Marques, L; Skorokhod, Y; Soares, R

nossos autores

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