![The Synthesis of [Sn10SiSiMe334]2- Using a Metastable SnI Halide Solution Synthesized via a Co-condensation Technique](/_next/image?url=https%3A%2F%2Fcloudfront.jove.com%2FCDNSource%2Fteasers%2F54498.jpg&w=3840&q=50)
La14TME6CuS24O4的合成和特性,表现出多价值旋转链 (TME = Cr, Fe) 的情况
Emil H Frøen1, Martin Valldor1
1Department of Chemistry, University of Oslo, Sem Sælands vei 26, NO-0316 Oslo, Norway.
ACS omega
|May 27, 2024
概括
新的金氧硫化物La14TME6CuS24O4 (TME=Cr,Fe) 被合成了. 这些材料表现出具有1D旋链层的新晶体结构,显示了旋域形成和独特的电子特性.
科学领域:
- 固态化学和材料科学 固态化学和材料科学
- 无机合成和结晶学.
- 凝聚物质物理学,专注于磁力.
背景情况:
- 五氧硫化物代表了一类具有新电子和磁性特性潜力的材料.
- 了解复杂无机化合物的结构-性质关系对于材料发现至关重要.
- 基于兰的化合物提供独特的电子配置,可以影响磁性行为.
研究的目的:
- 合成和描述具有一般公式La14TME6CuS24O4的新氧硫化物化合物,其中TME是过渡金属元素 (Cr或Fe).
- 为了阐明晶体结构,并研究这些新型材料的磁性.
- 用理论计算来探索电子结构和正式的氧化状态.
主要方法:
- 在密封的片中进行固态合成,用于制备化合物.
- 用X射线衍射 (单晶和粉末) 来确定晶体结构和细化晶格参数.
- 交替电流 (AC) 和直流 (DC) 磁性易感度测量以探测磁性行为.
- 密度函数理论 (DFT) 计算以确定正式的氧化状态和电子结构.
主要成果:
- 两种新的二氧硫化物同类物,La14Cr6CuS24O4和La14Fe6CuS24O4,已经成功合成.
- 确定了一种新的单临晶体结构 (空间组C2/m),其中包括1D过渡金属元素 (TME) 的三元链,形成2D层,并与La-O链相间隔.
- 对磁感应度的测量表明,在Cr和Fe两种类型中都有自旋域的形成.
- DFT计算表明La14TME52+TME3+Cu+S24O4的形式氧化状态表示.
结论:
- 合成的二氧硫化物具有独特的晶体结构,与相互连接的TME剪切器形成旋链层.
- 观察到的自旋域形成突出显示了这些新型材料中的复杂磁相互作用.
- 拟议的氧化状态为控制观察到的性质的电子配置提供了洞察力.
相关概念视频
02:42Valence Bond Theory
8.5K
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...
8.5K
03:02Colors and Magnetism
11.6K
Color in Coordination Complexes
When atoms or molecules absorb light at the proper frequency, their electrons are excited to higher-energy orbitals. For many main group atoms and molecules, the absorbed photons are in the ultraviolet range of the electromagnetic spectrum, which cannot be detected by the human eye. For coordination compounds, the energy difference between the d orbitals often allows photons in the visible range to be absorbed and emitted, which is seen as colors by the human...
When atoms or molecules absorb light at the proper frequency, their electrons are excited to higher-energy orbitals. For many main group atoms and molecules, the absorbed photons are in the ultraviolet range of the electromagnetic spectrum, which cannot be detected by the human eye. For coordination compounds, the energy difference between the d orbitals often allows photons in the visible range to be absorbed and emitted, which is seen as colors by the human...
11.6K
02:37Metallic Solids
18.4K
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....
18.4K
01:17Spin–Spin Coupling: One-Bond Coupling
957
Coupling interactions are strongest between NMR-active nuclei bonded to each other, where spin information can be transmitted directly through the pair of bonding electrons. While nuclei polarize their electrons to the opposite spins, the bonding electron pair has opposite spins. Configurations with antiparallel nuclear spins are expected to be lower in energy. When coupling makes antiparallel states more favorable, J is considered to have a positive value. The one-bond coupling constant, 1J,...
957
02:58Crystal Field Theory - Octahedral Complexes
26.4K
Crystal Field Theory
To explain the observed behavior of transition metal complexes (such as colors), a model involving electrostatic interactions between the electrons from the ligands and the electrons in the unhybridized d orbitals of the central metal atom has been developed. This electrostatic model is crystal field theory (CFT). It helps to understand, interpret, and predict the colors, magnetic behavior, and some structures of coordination compounds of transition metals.
CFT focuses on...
To explain the observed behavior of transition metal complexes (such as colors), a model involving electrostatic interactions between the electrons from the ligands and the electrons in the unhybridized d orbitals of the central metal atom has been developed. This electrostatic model is crystal field theory (CFT). It helps to understand, interpret, and predict the colors, magnetic behavior, and some structures of coordination compounds of transition metals.
CFT focuses on...
26.4K
03:26Electron Configuration of Multielectron Atoms
40.4K
The alkali metal sodium (atomic number 11) has one more electron than the neon atom. This electron must go into the lowest-energy subshell available, the 3s orbital, giving a 1s22s22p63s1 configuration. The electrons occupying the outermost shell orbital(s) (highest value of n) are called valence electrons, and those occupying the inner shell orbitals are called core electrons. Since the core electron shells correspond to noble gas electron configurations, we can abbreviate electron...
40.4K