• 文献标题:   A new route to graphene starting from heavily ozonized fullerenes: Part 3-an electron spin resonance study
  • 文献类型:   Article
  • 作  者:   CATALDO F, PUTZ MV, URSINI O, ANGELINI G, GARCIAHERNANDEZ DA, MANCHADO A
  • 作者关键词:   graphene, fullerene ozopolymer, graphite oxide, electron spin resonance, epr
  • 出版物名称:   FULLERENES NANOTUBES CARBON NANOSTRUCTURES
  • ISSN:   1536-383X EI 1536-4046
  • 通讯作者地址:   Actinium Chem Res Srl
  • 被引频次:   7
  • DOI:   10.1080/1536383X.2015.1113524
  • 出版年:   2016

▎ 摘  要

It is shown that graphite oxide (GO) and both heavily ozonized C-60 and C-70 fullerenes, known as fullerene ozopolymers, are paramagnetic materials with a very strong electron spin resonance (ESR) signal at room temperature. When thermally annealed, the paramagnetic centers are gradually lost in large part. This occurs at 350 degrees C in the case of GO, while for fullerene ozopolymers, a higher temperature is required, reaching the same results in the end. The half-width of ESR signal is linked to the distribution of paramagnetic centers. Once again, striking analogies were found in the half-width of the ESR signal measured on GO and fullerene ozopolymers, at least in the temperature range of 25-450 degrees C. Similarly, the same g-factor values, which are diagnostic for understanding the chemical nature of paramagnetic centers, were found on both GO and fullerene ozopolymers in all ranges of temperature considered.