探索基于磁热效应的Gd独家集群Gd的性能改善
Xi-Ming Luo1, Zhao-Bo Hu2, Qing-Fang Lin1
1College of Chemical Engineering , State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing Tech University , Nanjing 210009 , P. R. China.
Journal of the American Chemical Society
|August 24, 2018
概括
研究人员开发了一种新方法来合成大型加多团,实现了这种高核度团有史以来最高的磁变化,推进了磁热效应应用.
科学领域:
- 材料科学
- 化学学
- 物理
背景情况:
- 由于Gd (III) 的f7电子配置,加多 (Gd) 团显示出磁热效应 (MCE) 的前景.
- 由于结构控制的困难,提高Gd集群的MCE具有挑战性.
研究的目的:
- 开发一种新型的高核度化物集群的合成策略.
- 为了改善加多团的磁热性质.
主要方法:
- 在现场水解乙以控制配体释放.
- 溶热合成条件
- 大型兰坦化集群复合物的分离和特征 (1-Gd60).
主要成果:
- 一个新型的大型化物独占集群,1-Gd60,被合成.
- 聚合物具有高的金属对连接物比率,表明其磁密度很高.
- 最大的磁变化 (-ΔSmmax=48.0 J kg-1 K-1 在2 K的 ΔH = 7 T) 在报告的高核度兰坦化团中实现.
结论:
- 新的合成方法可以创建具有增强MCE特性的复杂胺结构.
- 合成的1-Gd60集群代表了磁热材料领域的重大进步.
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