Abstract
Magnetism of supramolecular assemblies of single-walled carbon nanotubes (SWCNTS) with a magnetic dinuclear molecule is investigated. Raman, optical absorption and confocal fluorescence images are used to probe the interaction of the dinuclear compound and the SWCNT. The supramolecular assembly shows antiferromagnetism, on the contrary to the case when strong electronic doping of the SWCNT occurs, yielding a spin-glass system, and contrary to the case of the dinuclear molecular crystal, which is ferromagnetic. The SWCNT imposes the antiferromagnetic order to the dinuclear molecule, corroborating recent findings that antiferromagnetism is present in pure SWCNTs. Two theoretical models are used to fit the data, both yielding good fitting results. The nanoparticle size range is around 2–10 nm.
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Acknowledgments
We thank Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq), Fundação de Amparo à Pesquisa do Estado de Minas Gerais (FAPEMIG), Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES), and Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) for financial support. We thank Miguel Julve for a private communication about the values of magnetization of the pure Na4[Cu2(mpba)2]·8H2O.
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Sáfar, G.A.M., Simões, T.R.G., de Paula, A.M. et al. A luminescent supramolecular assembly composed of a single-walled carbon nanotube and a molecular magnet precursor. J Nanopart Res 15, 1436 (2013). https://doi.org/10.1007/s11051-013-1436-5
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DOI: https://doi.org/10.1007/s11051-013-1436-5