Hydrogen-bond engineering induced ferroelastic phase transition in copper-based organic-inorganic hybrid thermochromic materials.

Authors :: Deng X
Zhou L
Yan X
Wang YJ
Yang WL
Lv HP
Tang YY
Source :: Chemical communications (Cambridge, England) [Chem Commun (Camb)] 2024 Nov 05. Date of Electronic Publication: 2024 Nov 05.
Publication Year :: 2024
Publisher :: Ahead of Print
Abstract: We report two organic-inorganic hybrid thermochromic crystals, [(2A5MP) <subscript>2</subscript> CuCl <subscript>4</subscript> ] (2A5MP = 2-amino-5-methylpyridine) (1) and [(2A4MP) <subscript>2</subscript> CuCl <subscript>4</subscript> ] (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.

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