The lone-pair-electron-driven phase transition and order–disorder processes in thermochromic (2-MIm)SbI4organic–inorganic hybrid

Thermochromic (2-MIm)SbI₄hybrid crystals undergo normal to modulated phase transition at 295 K which affects mainly the anionic substructure. Pronounced color changes correlate to modifications of the intra chain Sb–I and Sb⋯Sb connections.