Fig. 1. (A) Chain and packing crystal structures of 1c determined at −100 °C. C: grey, N: blue, O: red, F: light green, S: yellow, Cu: dark green octahedra. H is omitted for clarity. (B) Schematic illustration of thermal and mechanical processes and phase-changing behaviours among 1c, 1m, 1s, and 1o. (C) DSC profile of 1c. The melting point (Tm) and glass transition point (Tg1) are indicated by dashed lines. (D) Optical images of 1c (25 °C) and the melt at 280 °C (1m).
