期刊
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
卷 57, 期 28, 页码 8498-8502出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201802785
关键词
actuators; azobenzene; photomechanical effects; self-healing; single crystals
资金
- NIT Meghalaya
- DST SERB ECR Grant [ECR/2016/000331]
The first example of a smart crystalline material, the 2:1 cocrystal of probenecid and 4,4-azopyridine, which responds reversibly to multiple external stimuli (heat, UV light, and mechanical pressure) by twisting, bending, and elastic deformation without fracture is reported. This material is also able to self-heal on heating and cooling, thereby overcoming the main setbacks of molecular crystals for future applications as crystal actuators. The photo- and thermomechanical effects and self-healing capabilities of the material are rooted in reversible trans-cis isomerization of the azopyridine unit and crystal-to-crystal phase transition. Fairly isotropic intermolecular interactions and interlocked crisscrossed molecular packing secure high elasticity of the crystals.
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