ePrints@IIScePrints@IISc Home | About | Browse | Latest Additions | Advanced Search | Contact | Help

Polymerization and Pressure-Induced Amorphization of C60 and C70

Rao, CNR and Govindaraj, A and Aiyer, Hemantkumar N and Seshadri, Ram (1995) Polymerization and Pressure-Induced Amorphization of C60 and C70. In: Journal of Physical Chemistry, 99 (46). pp. 16814-16816.

[img] PDF
Polymerization_and_Pressure-.pdf - Published Version
Restricted to Registered users only

Download (1260Kb) | Request a copy
Official URL: http://pubs.acs.org/doi/abs/10.1021/j100046a003

Abstract

Scanning tunneling microscopy of solid films of C-60 and C-70 clearly demonstrate the occurrence of photochemical polymerization of these fullerenes in the solid state. X-ray diffraction studies show that such a polymerization is accompanied by contraction of the unit-cell volume in the case of C-60 and expansion in the case of C-70. This is also evidenced from the STM images. These observations help to understand the differences in the amorphization behavior of C-60 and C-70 under pressure. Amorphization of C-60 under pressure is irreversible because it is accompanied by polymerization associated with a contraction of the unit cell volume. Monte Carlo simulations show how pressure-induced polymerization is favored in C-60 because of proper orientation as well as the required proximity of the molecules. Amorphization of C-70, on the other hand, is reversible because C-70 is less compressible and polymerization is not favored under pressure.

Item Type: Editorials/Short Communications
Additional Information: Copyright of this article belongs to American Chemical Society.
Department/Centre: Division of Chemical Sciences > Solid State & Structural Chemistry Unit
Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Others
Date Deposited: 24 May 2011 04:46
Last Modified: 24 May 2011 04:46
URI: http://eprints.iisc.ernet.in/id/eprint/37863

Actions (login required)

View Item View Item