DSC thermophysics on some medium chain thallium(I) n-alkanoates: Phase transitions, thermal functions and heat capacity

Abstract

Four members of the series of anhydrous thallium(I) n-alkanoates with medium chain-length (n-octanoate, n-nonanoate, n-undecanoate and n-tridecanoate) have been prepared, purified, and studied by differential scanning calorimetry between 200 and 500 K. Their polymorphic and mesomorphic behaviour has also been investigated by polarization microscopy. The temperatures and enthalpy changes for the phase transitions have been measured and the corresponding entropy changes calculated. Heat capacity measurements by DSC between 300 and 500 K are also reported. © 1989.