相关实验视频
Updated: Feb 24, 2026

08:40
Gyroid Nickel Nanostructures from Diblock Copolymer Supramolecules
Published on: April 28, 2014
12.9K
像泰迪熊这样的巨型-Tungstate多氧金属酸盐的稀土导向等级组合
Shu-Rong Li1, Shi-Yi Wang1, Han Xu1
1Department of Chemistry, College of Chemistry and Chemical Engineering, and State Key Laboratory of Physical Chemistry of Solid Surfaces, Xiamen University, Xiamen, China.
Angewandte Chemie (International ed. in English)
|February 22, 2026
概括
稀土离子指导巨型聚氧甲酸盐 (POM) 的组装,形成独特的"泰迪熊"结构. 这一发现使得通过选择性结晶能够有效地分离稀土元素.
科学领域:
- 无机化学 无机化学
- 材料科学 材料科学 材料科学
- 纳米技术纳米技术
背景情况:
- 对巨型聚氧甲酸盐 (POMs) 的控制组装是一个重大挑战.
- 替代的体系统为复杂的POM形成提供了潜力.
研究的目的:
- 调查稀土离子在指导替代酸POMs的结构结果中的作用.
- 探索使用POM选择性结晶和分离稀土元素的潜力.
主要方法:
- 水热反应涉及柔性酸前体,稀土氧化物 (Er2O3,Dy2O3,Gd2O3) 和化.
- 使用X射线衍射和其他分析技术,对由此产生的聚氧甲酸集群进行结构性表征.
主要成果:
- 一个巨大的 {W88Ni39} 星团与一个
- 有一个泰迪熊.
- - - 类似的建筑被合成,由Er2O3.3指导.
- 缺失或替代Er2O3产生了一个较小的{W55Ni17}集群,而Dy2O3增强了结晶.
- 一个巨大的四合体{W140Gd10Ni48}是由Gd2O3形成的,它具有一个特征.
- 泰迪熊的身体.
- 一个动机,一个动机.
- 通过选择性结晶实现了Er2O3和Gd2O3 (分离因子360.37) 的高效无有机分离.
结论:
- 稀土离子在复杂POMs的合成中起到关键的结构指导作用.
- 这项工作揭示了基于结构指导的层次组装的稀土分离的新策略.
- 合成的POMs代表了一些已知最大的基于的离散组件.
相关概念视频
Valence Bond Theory
11.4K
Coordination compounds and complexes exhibit different colors, geometries, and magnetic behavior, depending on the metal atom/ion and ligands from which they are composed. In an attempt to explain the bonding and structure of coordination complexes, Linus Pauling proposed the valence bond theory, or VBT, using the concepts of hybridization and the overlapping of the atomic orbitals. According to VBT, the central metal atom or ion (Lewis acid) hybridizes to provide empty orbitals of suitable...
11.4K
Crystal Field Theory - Tetrahedral and Square Planar Complexes
48.9K
Tetrahedral Complexes
Crystal field theory (CFT) is applicable to molecules in geometries other than octahedral. In octahedral complexes, the lobes of the dx2−y2 and dz2 orbitals point directly at the ligands. For tetrahedral complexes, the d orbitals remain in place, but with only four ligands located between the axes. None of the orbitals points directly at the tetrahedral ligands. However, the dx2−y2 and dz2 orbitals (along the Cartesian axes) overlap with the ligands less than the dxy,...
Crystal field theory (CFT) is applicable to molecules in geometries other than octahedral. In octahedral complexes, the lobes of the dx2−y2 and dz2 orbitals point directly at the ligands. For tetrahedral complexes, the d orbitals remain in place, but with only four ligands located between the axes. None of the orbitals points directly at the tetrahedral ligands. However, the dx2−y2 and dz2 orbitals (along the Cartesian axes) overlap with the ligands less than the dxy,...
48.9K
Ionic Crystal Structures
18.6K
Ionic crystals consist of two or more different kinds of ions that usually have different sizes. The packing of these ions into a crystal structure is more complex than the packing of metal atoms that are the same size.
Most monatomic ions behave as charged spheres, and their attraction for ions of opposite charge is the same in every direction. Consequently, stable structures for ionic compounds result (1) when ions of one charge are surrounded by as many ions as possible of the opposite...
Most monatomic ions behave as charged spheres, and their attraction for ions of opposite charge is the same in every direction. Consequently, stable structures for ionic compounds result (1) when ions of one charge are surrounded by as many ions as possible of the opposite...
18.6K
Metallic Solids
21.0K
Metallic solids such as crystals of copper, aluminum, and iron are formed by metal atoms. The structure of metallic crystals is often described as a uniform distribution of atomic nuclei within a “sea” of delocalized electrons. The atoms within such a metallic solid are held together by a unique force known as metallic bonding that gives rise to many useful and varied bulk properties.
All metallic solids exhibit high thermal and electrical conductivity, metallic luster, and malleability....
All metallic solids exhibit high thermal and electrical conductivity, metallic luster, and malleability....
21.0K

