Controlling intermolecular spin interactions of La@C82 in empty fullerene matrices

Author(s)

Yasuhiro Ito, Jamie H. Warner, Richard Brown, Mujtaba Zaka, Rudolf Pfeiffer, Takayuki Aono, Noriko Izumi, Haruya Okimoto, John J. L. Morton, Arzhang Ardavan, Hinsanori N. Shinohara, Hans Kuzmany, Herwig Peterlik, Gordon Andrew D. Briggs

Abstract

The ESR properties and crystal structures of solid-state La@C-82 in empty fullerene matrices were investigated by changing the concentration of La@C-82 and the species of an empty fullerene matrix: C-60, C-70, C-78(C-2v(3)), C-82(C-2) and C-84(D-2d(4)). The rotational correlation time of La@C-82 molecules tended to be shorter when La@C-82 is dispersed in larger fullerene matrices because large C-2n molecules provide more space for La@C-82 molecules for rotating. La@C-82 dispersed in a hcp-C-82 matrix showed the narrowest hyperfine structure (hfs) due to the ordered nature of La@C-82 molecules in the C-82 crystal. On the other hand, in a C-60 matrix, La@C-82 molecules formed clusters because of the large different solubility, which leads to the ESR spectra being broad sloping features due to strong dipole-dipole and exchange interactions.

Organisation(s)

Dynamics of Condensed Systems, Electronic Properties of Materials

External organisation(s)

University of Oxford, Nagoya University

Journal

Physical Chemistry Chemical Physics

Volume

12

Pages

1618-1623

No. of pages

6

ISSN

1463-9076

DOI

https://doi.org/10.1039/b913593f

Publication date

2010

Peer reviewed

Yes

Austrian Fields of Science 2012

103009 Solid state physics

Portal url

https://ucrisportal.univie.ac.at/en/publications/83f8bb34-b766-4b17-af3a-d6aa164a6f10