Figure 1: Temperature dependence of differential scanning calorimetry and heat capacity for 1.

(a) DSC curves of crystal 1 recorded at the rate of 10 K min−1 during a cooling–heating (blue-red lines) cycle. Exo: exothermic peak; Endo: endothermic peak. (b) The phase transition temperature (Ttrs) is determined to be 243.2 K on heating. Filled red and blue circles represent the data obtained during heating mode after the samples were cooled to 7.6 and 240.9 K, respectively.