Polymerization of the rotor-stator compound C60 -cubane under pressure

A. Iwasiewicz-Wabnig, B. Sundqvist, É Kováts, I. Jalsovszky, S. Pekker

Research output: Contribution to journalArticle

23 Citations (Scopus)

Abstract

Cubane, C8 H8, can be inserted into the octahedral voids of fullerene lattices to create a family of rotor-stator compounds. We have investigated the structural phase behavior of C60 · C8 H8 by annealing a number of samples for up to 3 h at selected temperatures in the range 380-870 K under pressures up to 2 GPa. The high-pressure treated materials were then investigated under ambient conditions using Raman spectroscopy and x-ray diffraction. C60 · C8 H8 is found to have at least five different structural phases depending on treatment conditions. In addition to the known cubic and orthorhombic structures observed at atmospheric pressure, we find two polymeric states with pseudocubic and pseudoorthorhombic structures, respectively, based on the two original lattices and created by heating in different pressure ranges. These materials are believed to be copolymers of C60 and decomposition products of cubane. In contrast to the polymeric states of C60 the present polymer structures are determined by the topology of the original lattices rather than by the molecular structure. Above 700 K we find a carbon-rich amorphous state created when the cubane finally decomposes, releasing its hydrogen content in the form of hydrocarbons.

Original languageEnglish
Article number024114
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume75
Issue number2
DOIs
Publication statusPublished - 2007

Fingerprint

cubane
stators
Stators
rotors
polymerization
Rotors
Polymerization
Fullerenes
releasing
Phase behavior
Hydrocarbons
Molecular structure
Atmospheric pressure
fullerenes
Raman spectroscopy
voids
Hydrogen
copolymers
atmospheric pressure
Polymers

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

Polymerization of the rotor-stator compound C60 -cubane under pressure. / Iwasiewicz-Wabnig, A.; Sundqvist, B.; Kováts, É; Jalsovszky, I.; Pekker, S.

In: Physical Review B - Condensed Matter and Materials Physics, Vol. 75, No. 2, 024114, 2007.

Research output: Contribution to journalArticle

Iwasiewicz-Wabnig, A. ; Sundqvist, B. ; Kováts, É ; Jalsovszky, I. ; Pekker, S. / Polymerization of the rotor-stator compound C60 -cubane under pressure. In: Physical Review B - Condensed Matter and Materials Physics. 2007 ; Vol. 75, No. 2.
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