Fig. 2

Differential scanning calorimetry curve of [NH3(CH2)2NH3]CuBr4 (inset: morpology of the crystal at various temperatures of (a) 300 K, (b) 423 K, (c) 473 K, (d) 497 K, and (e) 603 K).

Differential scanning calorimetry curve of [NH3(CH2)2NH3]CuBr4 (inset: morpology of the crystal at various temperatures of (a) 300 K, (b) 423 K, (c) 473 K, (d) 497 K, and (e) 603 K).