Rotor-stator molecular crystals of fullerenes with cubane.
Nat Mater
; 4(10): 764-7, 2005 Oct.
Article
em En
| MEDLINE
| ID: mdl-16142242
ABSTRACT
Cubane (C8H8) and fullerene (C60) are famous cage molecules with shapes of platonic or archimedean solids. Their remarkable chemical and solid-state properties have induced great scientific interest. Both materials form polymorphic crystals of molecules with variable orientational ordering. The idea of intercalating fullerene with cubane was raised several years ago but no attempts at preparation have been reported. Here we show that C60 and similarly C70 form high-symmetry molecular crystals with cubane owing to topological molecular recognition between the convex surface of fullerenes and the concave cubane. Static cubane occupies the octahedral voids of the face-centred-cubic structures and acts as a bearing between the rotating fullerene molecules. The smooth contact of the rotor and stator molecules decreases significantly the temperature of orientational ordering. These materials have great topochemical importance at elevated temperatures they transform to high-stability covalent derivatives although preserving their crystalline appearance. The size-dependent molecular recognition promises selective formation of related structures with higher fullerenes and/or substituted cubanes.
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Base de dados:
MEDLINE
Assunto principal:
Compostos Inorgânicos de Carbono
/
Proteínas Motores Moleculares
/
Cristalização
/
Fulerenos
/
Nanoestruturas
País/Região como assunto:
Cuba
Idioma:
En
Revista:
Nat Mater
Assunto da revista:
CIENCIA
/
QUIMICA
Ano de publicação:
2005
Tipo de documento:
Article
País de afiliação:
Hungria