Cold neutrons are widely used in different fields of research such as the study of the structure and dynamics of solids and liquids, the investigation of magnetic materials, biological systems, polymer science, and a rapidly growing area of industrial applications. The development and optimization of advanced cold neutron sources require neutronic calculations involving thermal and sub thermal neutron energies, which in turn demand the knowledge of reliable cross section data relative to the materials which form the system under consideration. We propose to use the instrument VESUVIO which allows the simultaneous measurement of the total cross section and the effective temperatures of the atoms that compose the sample to explore triphenylmethane and ethane at different temperatures. These systems are potential candidates for new cold moderators.