| Popis: |
Proton spin–lattice relaxation times have been studied in para-toluenesulphonic acid hydrate, CH3C6H4SO3–H3O+, as a function of temperature between 80 K and its melting point. Two relaxation processes occur which have been attributed to three-fold reorientations of the oxonium ion, H3O+, and the methyl group, —CH3. Activation energies of 51.6 and 7.30 kJ mol–1, respectively, have been determined for these processes and they are discussed in terms of the interactions of the rotors with their environment in the lattice. |
