基于结构相关的3d金属协调复合物的双金属液晶混合物
Carmen Cretu1, Evelyn Popa1, Giuseppe Di Maio2
1Coriolan Dragulescu Institute of Chemistry, Romanian Academy, 24, Mihai Viteazu Bvd., 300223-Timisoara, Romania. eszerb@acad-icht.tm.edu.ro.
概括
新的异金属双金属液晶材料是通过混合铜 (II) 和 (II) 金属聚合物而产生的. 它们的性能可以通过调整金属比例来调整,从而实现新的多功能材料.
科学领域:
- 材料科学 材料科学 材料科学
- 超分子化学 超分子化学
- 液晶是一种液晶.
背景情况:
- 液晶材料为先进的应用提供独特的特性.
- 金属聚合物,将金属离子纳入液晶结构,扩大材料的功能.
- 多金属系统的调特性对于开发新材料至关重要.
研究的目的:
- 合成和描述新型异金属双金属液晶材料.
- 为了研究金属组成对中相行为和光学特性的影响.
- 探索聚金属系统中调超分子相互作用和协同效应的潜力.
主要方法:
- 结构相关的铜 (II) 和 (II) 金属同源的化学混合.
- 液晶相的表征 (Colhex mesophase). 液晶相的表征 (Colhex mesophase). 液晶相的表征 (Colhex mesophase). 液晶相的表征 (Colhex mesophase). 液晶相的表征 (Colhex mesophase). 液晶相的表征 (Colhex mesophase). 液晶相的表征.
- 分析金属比的函数中等态和光学性能.
主要成果:
- 通过单个六边形柱状 (Colhex) 中位相,成功合成了异金属双金属液晶材料.
- 通过改变Cu (II) 和Zn (II) 组件的相对比例,证明了中形和光学性能的可调性.
- 基于金属组成的修改的超分子相互作用和协同效应的观察.
结论:
- 简单的化学混合是一种有效的方法,用于创建可调节的异金属双金属液晶材料.
- 金属中心的相对比例显著影响材料的性能.
- 这些发现为制造具有控制性质的新型多功能聚金属材料开辟了道路.
相关概念视频
Metallic Solids
18.5K
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....
18.5K
Metal-Ligand Bonds
21.0K
The hemoglobin in the blood, the chlorophyll in green plants, vitamin B-12, and the catalyst used in the manufacture of polyethylene all contain coordination compounds. Ions of the metals, especially the transition metals, are likely to form complexes.
In these complexes, transition metals form coordinate covalent bonds, a kind of Lewis acid-base interaction in which both of the electrons in the bond are contributed by a donor (Lewis base) to an electron acceptor (Lewis acid). The Lewis acid in...
In these complexes, transition metals form coordinate covalent bonds, a kind of Lewis acid-base interaction in which both of the electrons in the bond are contributed by a donor (Lewis base) to an electron acceptor (Lewis acid). The Lewis acid in...
21.0K
Valence Bond Theory
8.7K
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...
8.7K
Structural Isomerism
19.4K
Isomerism in Complexes
Isomers are different chemical species that have the same chemical formula. Structural isomerism of coordination compounds can be divided into two subcategories, the linkage isomers and coordination-sphere isomers.
Linkage isomers occur when the coordination compound contains a ligand that can bind to the transition metal center through two different atoms. For example, the CN− ligand can bind through the carbon atom or through the nitrogen atom. Similarly, SCN− can...
Isomers are different chemical species that have the same chemical formula. Structural isomerism of coordination compounds can be divided into two subcategories, the linkage isomers and coordination-sphere isomers.
Linkage isomers occur when the coordination compound contains a ligand that can bind to the transition metal center through two different atoms. For example, the CN− ligand can bind through the carbon atom or through the nitrogen atom. Similarly, SCN− can...
19.4K
Coordination Compounds and Nomenclature
21.6K
In most main group element compounds, the valence electrons of the isolated atoms combine to form chemical bonds that satisfy the octet rule. For instance, the four valence electrons of carbon overlap with electrons from four hydrogen atoms to form CH4. The one valence electron leaves sodium and adds to the seven valence electrons of chlorine to form the ionic formula unit NaCl (Figure 1a). Transition metals do not normally bond in this fashion. They primarily form coordinate covalent bonds, a...
21.6K
Complexation Equilibria: The Chelate Effect
553
In complexation reactions, metal atoms or cations interact with ligands to form donor-acceptor adducts called metal complexes. Ligands that bind through one donor site are monodentate, ligands with two donor sites are bidentate, and those with more than two donor sites are polydentate ligands. For example, ethylene diamine is a bidentate ligand that binds through two nitrogen donor atoms, forming a five-membered ring. EDTA is a polydentate ligand that binds through four oxygen and two nitrogen...
553


