resumo
Fullerene networks are an exciting class of materials that may display exceptional physical properties. A new C-70-fullerene network phase, synthesized at high-pressure, 7 GPa, and high-temperature, 600 degrees C, is presented. Its structure, determined by Rietveld analysis of the X-ray diffraction data combined with density functional theory modeling, consists of puckered polymerized layers where each molecule is bonded to three neighbors through 2 + 2 cycloaddition bonds, a new polymeric configuration unseen in other fullerene networks. This new C-70-fullerene network structure adds to the previous zigzag structures, demonstrating the potential of C-70 molecules as building blocks to synthesize new carbon phases. (C) 2015 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
palavras-chave
POLYMERIZATION; C-60; POLYMERS; DIAMOND
categoria
Materials Science; Physics
autores
Marques, L; Skorokhod, Y; Soares, R
nossos autores
Leonel Marques Vitorino Joaquim
Professor Auxiliar
Maria do Rosário Teixeira Soares
Técnico Superior
Yuriy Skorokhod
InvestigadorProjectos
High-pressure synthesis and structure determination of novel nanostructured materials (PTDC/FIS/104310/2008)
Centre for Research in Ceramics and Composite Materials - CICECO (LA0011: 2013-2014) (PEst-C/CTM/LA0011/2013)
agradecimentos
L. Marques and Y. Skorokhod acknowledge 'Fundacao para a Ciencia e Tecnologia' (FCT) and EU/FEDER COMPETE (Project PTDC/FIS/104310/2008 and contracts PEST-C/CTM/LA0011/2013 and FCOMP-01-0124-FEDER-037271) for financial support. M. Alvarez-Murga and S. Klotz are thanked for advice on press operation.