Thermally Induced Reversible Martensitic Phase Transition and Self-Healing in Nickel Glycinamide Crystals.

ABSTRACT: Martensitic phase transitions and self-healing in molecular compounds are extremely rare, and while they carry potential for rapid energy transduction, they are currently found only by serendipity. Here, we report the observation of both phenomena in a coordination compound of glycinamide (Glyam), [Ni(H₂O)₂(Glyam)₂]I₂ (1). Upon cooling to 205-213 K, the high-temperature polymorph of this material (1_RT) transforms into twinned crystals of the low-temperature polymorph (1_LT(twinned)), while upon heating, it is converted back to 1_RT in the temperature range 217-223 K. When this transformation occurs in single crystals, evolution of cracks is observed upon cooling that disappear upon heating. The forward transition 1<

SUBMITTER: Vusak D 

PROVIDER: S-EPMC11914946 | biostudies-literature | 2025 Mar

REPOSITORIES: biostudies-literature