Measurements of thermophysical properties as tools to study the phase diagrams of fullerenes under pressure

摘要

The ways in which measurements of thermophysical properties such as the thermal conductivity and the bulk modulus can be used as tools to study the evolution of the Uanslational, rotational, and orientational structure of fullerenes with temperature and pressure arc discussed. Recent experimental data for C60 and C70 are discussed and explained in terms of models for their orientational and rotational structures, in particular, effects of molecular rcorientation, orientational ordering, and the freezing in of abnormal orientational order in C60 under pressures up to 1 GPa at temperatures below 300 K, and polymerisation of C60 at similar pressures above 450 K, are examined.