Effects of pressure on the azafullerene (C{sub 59}N){sub 2} molecular solid to 22 GPa
- Univ. of Sussex, Brighton (United Kingdom)
- Univ. of California, Santa Barbara. CA (United States); and others
In this communication, we report the results of high-pressure powder synchrotron X-ray diffraction experiments on a crystalline solid azafullerene sample up to a pressure of 22 GPa in an attempt to probe the diversity of bonding interactions present in this material with pressure tuning of the intermolecular distances. In conclusion, angle-dispersive X-ray diffraction measurements were performed on solid (C{sub 59}N){sub 2} up to 22 GPa at room temperature, revealing a somewhat less compressible solid than pristine C{sub 60}. We were able to probe the diverse character of the bonding interactions present in this solid, ranging from those in individual quasispherical C{sub 59}N monomer units to the intradimer C-C bridging bonds and the weak interdimer van der Waals interactions. The lack of strong anisotropy in the compressibility is rationalized in terms of the nonalignment of the C-C bridging bonds of the dimer with the unit cell axes. As the pressure increases, however, the interdimer distances compress faster than the intradimer ones, and, at nearly 6.5 GPa, they are both of comparable magnitude, leading to a novel high-pressure solid structure which appears to be characterized by almost isotropic bonding. 14 refs., 2 figs.
- OSTI ID:
- 380883
- Journal Information:
- Journal of the American Chemical Society, Vol. 118, Issue 36; Other Information: PBD: 11 Sep 1996
- Country of Publication:
- United States
- Language:
- English
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