Spectroscopic study of pressure-polymerized phases ofC60

Abstract

Comparative studies of the infrared (IR) and Raman spectra of the orthorhombic, tetragonal, and rhombohedral pressure-polymerized phases of ${\mathrm{C}}_{60}$ as well as the pressure-dimerized state have been performed at ambient conditions. The tentative assignment of the vibrational spectra of different phases has shown that they could be perfectly described by the molecular symmetry of the ${\mathrm{C}}_{60}$ polymers which are the structure-forming elements of crystalline polymerized phases. This allowed one to consider the IR and Raman spectra of the crystalline polymerized phases as characteristic of those of the appropriate one- and two-dimensional ${\mathrm{C}}_{60}$ polymers and to use them for molecular fractional analysis of polymerization products.