三种高对称的多聚酸盐[B12O24] 具有不同尺寸的阳离子组的单元
Yu Dang1,2, Jingdong Yan1,2, Xueling Hou1,2
1Research Center for Crystal Materials, CAS Key Laboratory of Functional Materials and Devices for Special Environments, Xinjiang Key Laboratory of Electronic Information Materials and Devices, Xinjiang Technical Institute of Physics & Chemistry, CAS, 40-1 South Beijing Road, Urumqi 830011, China.
ACS omega
|June 19, 2023
概括
合成了三种具有不同阴离子结构的新型聚酸盐. 这些发现扩大了酸盐的结构多样性,并为创造新材料提供了洞察力.
科学领域:
- 固态化学 固态化学
- 无机合成 无机合成
- 材料科学 材料科学 材料科学
背景情况:
- 酸盐是多种类型的无机化合物,在各种领域都有应用.
- 了解结构和特性之间的关系对于设计新的酸盐材料至关重要.
- 新型聚酸盐的合成和表征有助于扩大氧框架的已知的结构景观.
研究的目的:
- 合成和表征具有明显的阳离子结构的新型聚酸盐化合物.
- 调查由离子群的不同维度产生的结构多样性.
- 探索高温溶液方法的潜力,以创建复杂的酸框架.
主要方法:
- 聚酸盐的合成高温溶液方法.
- 单晶X射线衍射用于结晶结构的确定.
- 热分析 (例如,TGA/DSC) 用于评估热稳定性.
- 测量光学属性 (例如,UV-Vis光谱) 用于表征.
主要成果:
- 成功合成了三个新的多酸盐:LiNa11B28O48,Li1.45Na7.55B21O36,以及Li2Na4Ca7Sr2B13O27F9.
- 所有合成的化合物都含有高对称的[B12O24]单元,但表现出独特的阴离子结构:3D框架,1D链,和0D孤立单元.
- 确定了基于化的新型建筑单元 ([B15O30和[B21O39).
- 阳离子组中高度的聚合会导致显著的结构多样性.
结论:
- 这项研究表明,新型聚酸盐的成功合成具有前所未有的结构多样性.
- 这些发现突出了高温溶液方法在构建复杂的氧框架方面的多功能性.
- 详细的表征为未来设计和合成具有量身定制性质的新型聚酸材料提供了宝贵的指导.
相关概念视频
02:42Ionic Crystal Structures
14.5K
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...
14.5K
02:52VSEPR Theory and the Basic Shapes
68.6K
Overview of VSEPR Theory
68.6K
02:42Valence Bond Theory
8.8K
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...
8.8K
03:24Hybridization of Atomic Orbitals I
47.4K
The mathematical expression known as the wave function, ψ, contains information about each orbital and the wavelike properties of electrons in an isolated atom. When atoms are bound together in a molecule, the wave functions combine to produce new mathematical descriptions that have different shapes. This process of combining the wave functions for atomic orbitals is called hybridization and is mathematically accomplished by the linear combination of atomic orbitals. The new orbitals that...
47.4K
04:01VSEPR Theory and the Effect of Lone Pairs
42.5K
Effect of Lone Pairs of Electrons on Molecule Geometry
42.5K
02:46Crystal Field Theory - Tetrahedral and Square Planar Complexes
43.2K
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,...
43.2K