Xin Deng, Lin Zhou, Xin Yan, Yan-Juan Wang, Wen-Li Yang, Hui-Peng Lv and Yuan-Yuan Tang
Chem. Commun., 2024,60, 14766-14769
DOI:
10.1039/D4CC04373A,
Communication
We report two organic–inorganic hybrid thermochromic crystals, [(2A5MP)2CuCl4] (2A5MP = 2-amino-5-methylpyridine) (1) and [(2A4MP)2CuCl4] (2A4MP = 2-amino-4-methylpyridine) (2). Through hydrogen bond engineering optimization, the ferroelastic material 2 undergoes an isomorphic phase transition with a large thermal hysteresis of 36 K at 397 K/361 K.