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Abstract
Differential thermal gravimetry and differential scanning calorimetry studies of the 390 K phase transition of NMeQn(TCNQ)2 on samples containing different amounts of acetonitrile solvent are presented. It is shown that evaporation of the solvent is the driving force of a phase transition recently reported for this material. Transport properties-dc and ac conductivity and dielectric constant-of the phase containing the solvent are weakly dependent on solvent concentration.