Target Designing Phase Transition Materials through Halogen Substitution
| Autor: | Yu-Qiu Xu, Meng-Juan Yang, Hao Cheng, Meng-Zhen Li, Yong Ai |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Phase transition
Work (thermodynamics) Materials science Substitution (algebra) 02 engineering and technology Dielectric 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Potential energy Ferroelectricity Atomic and Molecular Physics and Optics 0104 chemical sciences Crystal Crystallography Halogen Physical and Theoretical Chemistry 0210 nano-technology |
| Zdroj: | ChemPhysChem. 22:752-756 |
| ISSN: | 1439-7641 1439-4235 |
| DOI: | 10.1002/cphc.202100040 |
| Popis: | Crystal materials have received extensive attention due to their extraordinary physical and chemical properties. Among them, phase transition materials have attracted great attention in the fields of photovoltaic, switchable dielectric devices, and ferroelectric memories, etc . However, many of them suffer from low phase transition temperatures, which limits their practical application. In this work, we systematically designed crystalline materials, (TMXM) 2 PtCl 6 (X = F, Cl, Br, I) through halogen substitution on the cations, aiming to improving phase transition temperature. The resulting phase transition of (TMXM) 2 PtCl 6 (X = F, Cl, Br, I) get a significant enhancement, compared to the parent compound [(CH 3 ) 4 N] 2 PtCl 6 ((TM) 2 PtCl 6 ). Such phase transition temperature enhancement can be attributed to the introduction of halogen atoms that increase the potential energy barrier of the cation rotation. In addition, (TMBM) 2 PtCl 6 and (TMIM) 2 PtCl 6 have a low symmetry and crystallize in the space group C 2 /c and P 2 1 2 1 2 1 , respectively. This work highlights the halogen substitution in designing crystal materials with high phase transition temperature. |
| Databáze: | OpenAIRE |
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