| 稀土簇基金属有机框架的合成、结构及磁学性质 |
| |
| 引用本文： | 郑秀英,孔祥建,龙腊生,郑兰荪.稀土簇基金属有机框架的合成、结构及磁学性质[J].应用化学,2017,34(9):1086-1092. |
| |
| 作者姓名： | 郑秀英 孔祥建 龙腊生 郑兰荪 |
| |
| 作者单位： | 厦门大学化学化工学院,固体表面物理化学国家重点实验室,能源材料化学协同创新中心 福建 厦门 361005 |
| |
| 基金项目： | 国家自然科学基金(21422106,21371144,21431005)资助项目 |
| |
| 摘 要： | 通过溶剂热法合成出了两种稀土簇基金属有机框架材料:{Ln_7(OH)_8(HOCH_2COO)_8(H_2O)_3]·Cl_5·3H_2O}_n(Ln=Gd(1),Dy(2))。磁性研究表明,化合物1在低温下具有较大的磁热效应,在3 K、7 T时磁熵变值高达44.4 J/(kg·K),化合物2在不加直流场的情况下具有明显的频率依赖性,表明化合物2具有缓慢弛豫的性质。此外,粉末衍射结果发现,化合物1和2具有非常高的化学稳定性,其可稳定存在于pH值1~14的水溶液及沸水中。结果表明,稀土簇基金属有机框架材料在低温磁制冷方面具有潜在的利用价值。
|
| 关 键 词： | 稀土金属有机框架 磁热效应 频率依赖性 化学稳定性 |
| 收稿时间： | 2017-05-25 |
Synthesis,Structure, Magnetic Properties of Lanthanide Cluster-Based Metal-Organic Frameworks |
| |
| ZHENG Xiuying,KONG Xiangjian,LONG Lasheng,ZHENG Lansun.Synthesis,Structure, Magnetic Properties of Lanthanide Cluster-Based Metal-Organic Frameworks[J].Chinese Journal of Applied Chemistry,2017,34(9):1086-1092. |
| |
| Authors: | ZHENG Xiuying KONG Xiangjian LONG Lasheng ZHENG Lansun |
| |
| Institution: | Collaborative Innovation Center of Chemistry for Energy Materials,State Key Laboratory of Physical Chemistry of Solid Surfaces and Department of Chemistry,College of Chemistry and Chemical Engineering, Xiamen University,Xiamen,Fujian 361005,China |
| |
| Abstract: | Two lanthanide cluster-based metal-organic frameworks of {Gd7(OH)8(HOCH2COO)8(H2O)3]·Cl5·3H2O}n(Ln=Gd(1), Dy(2)) were obtained by solvothermal reaction. The magnetic studies indicate that compound 1 exhibits a large magnetocalotic effect(MCE) values of 44.4 J/(kg·K) at 2 K and ΔH=7 T and compound 2 displays obvious frequency dependence(Hdc=0) which suggests that compound 2 shows slow relaxation. In addition, the results of powder diffraction reveals that compounds 1 and 2 display very high chemical stability, which can be stable in acid/base solution of pH=1~14 and boiling water. These results indicate that the lanthanide cluster-based metal-organic frameworks have the potential application in the low-temperature refrigeration. |
| |
| Keywords: | lanthanide organic-metal frameworks magnetocalotic effect frequency dependence chemical stability |
| 本文献已被 CNKI 等数据库收录！ |
| 点击此处可从《应用化学》浏览原始摘要信息 |
| 点击此处可从《应用化学》下载免费的PDF全文 |
|
