Solid Ar, N2, CO, and O2 in nanopores

Molecular solids enclosed in pores with diameters in the nm-range are a research field which attracts growing interest. The major questions asked in the's context are: what is the structure and the dynamics? How are phase and glass transitions modified by the geometrical constraint? In this contribution we present structural information, by x-ray diffraction, measurements, as well as thermodynamic characterization, by vapor pressure and heat capacity measurements, on. Arl which is usually considered the simplest of all condensates. and on the small diatomic molecules N-2, CO, O-2 in porous glasses with average pore diameters from 50 to 130 Angstrom.