关于两个[Co (II) 和Ni (II) ]复合物的结构,光学和电气性质的比较研究:通过理论分析的洞察力
Subhajit Saha1, Samit Pramanik2, Sudipta Pathak3
1Department of Chemistry, Jadavpur University, Kolkata 700032, India.
The journal of physical chemistry. B
|July 3, 2025
概括
合成和表征了两个新的和复合物. 综合体1显示出优越的电气性能,由于其较低的带隙和导电性,对于肖特基二极管.
科学领域:
- 协调化学 协调化学
- 超分子化学 超分子化学
- 材料科学 材料科学 材料科学
背景情况:
- 有机异环合联体在设计新型金属复合物的过程中至关重要.
- 超分子相互作用决定了固态材料的结构和特性.
- 肖特基二极管是基本的电子设备,在各种技术中都有应用.
研究的目的:
- 使用N3L连接体合成和表征新的和复合物.
- 研究这些复合体内的超分子结构和非共价相互作用.
- 评估复合体的电子和光学特性,以便在施托基二极管中潜在应用.
主要方法:
- 单晶X射线衍射用于结构阐明.
- 用QTAIM和NCIplot进行密度函数理论 (DFT) 计算,用于相互作用分析.
- 使用复杂制造的Schottky二极管的电气特征.
- 使用带结构计算对复合物的光学性质分析.
主要成果:
- 合成了两种新的复合物,即[Co(N3L) 2],[NO3) 2·6H2O (1) 和[Ni(N3L) 2],[NO3) 2·6H2O (2),并对其结构进行了表征.
- 观察到独特的1D,2D和3D超分子结构,由水集群和非共价相互作用稳定.
- 与复合体2相比,复合体1在Schottky二极管中表现出优越的电传输特性,这是由于其较低的带隙和导电性.
- DFT计算提供了关于离子π相互作用和键的见解.
结论:
- 合成的复合体显示了由非共价相互作用驱动的复杂的超分子架构.
- 综合体1显示出在基于肖特基二极管的电子设备中应用的巨大潜力.
- 理论研究支持所观察到的复合物的优越性能.
相关概念视频
02:34Structural Isomerism
19.7K
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...
19.7K
02:42Valence Bond Theory
9.7K
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...
9.7K
02:52Stereoisomerism
12.4K
Isomerism in Complexes
Isomers are different chemical species that have the same chemical formula.
Transition metal complexes often exist as geometric isomers, in which the same atoms are connected through the same types of bonds but with differences in their orientation in space. Coordination complexes with two different ligands in the cis and trans positions from a ligand of interest form isomers. For example, the octahedral [Co(NH3)4Cl2]+ ion has two isomers (Figure 1) In the cis...
Isomers are different chemical species that have the same chemical formula.
Transition metal complexes often exist as geometric isomers, in which the same atoms are connected through the same types of bonds but with differences in their orientation in space. Coordination complexes with two different ligands in the cis and trans positions from a ligand of interest form isomers. For example, the octahedral [Co(NH3)4Cl2]+ ion has two isomers (Figure 1) In the cis...
12.4K
03:02Colors and Magnetism
12.3K
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...
12.3K
02:58Crystal Field Theory - Octahedral Complexes
28.0K
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...
28.0K
02:54Coordination Compounds and Nomenclature
22.3K
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...
22.3K