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相关概念视频

Valence Bond Theory02:42

Valence Bond Theory

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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...
10.9K
Colors and Magnetism03:02

Colors and Magnetism

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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...
13.6K
Complexation Equilibria: The Chelate Effect01:19

Complexation Equilibria: The Chelate Effect

1.0K
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...
1.0K
Coordination Number and Geometry02:57

Coordination Number and Geometry

18.5K
For transition metal complexes, the coordination number determines the geometry around the central metal ion. Table 1 compares coordination numbers to molecular geometry. The most common structures of the complexes in coordination compounds are octahedral, tetrahedral, and square planar.
18.5K
Stereoisomerism02:52

Stereoisomerism

13.7K
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...
13.7K
Metal-Ligand Bonds02:51

Metal-Ligand Bonds

23.5K
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...
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相关实验视频

Updated: Dec 25, 2025

Amide Coupling Reaction for the Synthesis of Bispyridine-based Ligands and Their Complexation to Platinum as Dinuclear Anticancer Agents
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Amide Coupling Reaction for the Synthesis of Bispyridine-based Ligands and Their Complexation to Platinum as Dinuclear Anticancer Agents

Published on: May 28, 2014

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高发射的二核 (III) 复合物

Xiugang Wu1, Deng-Gao Chen, Denghui Liu1

  • 1School of Materials Science and Engineering, Jiangsu Collaborative Innovation Center of Photovoltaic Science and Engineering, Jiangsu Engineering Laboratory of Light-Electricity-Heat Energy-Converting Materials and Applications, Jiangsu Key Laboratories of Environment-Friendly Polymers, National Experimental Demonstration Center for Materials Science and Engineering, Changzhou University, Changzhou 213164, China.

Journal of the American Chemical Society
|April 1, 2020
PubMed
概括
此摘要是机器生成的。

新的双核 (III) 复合体具有 d7 - d7 配置,表现出强烈的光. 这些复合体显示了包括有机发光二极管 (OLED) 在内的照明应用的潜力.

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The Synthesis, Characterization and Reactivity of a Series of Ruthenium N-triphosPh Complexes
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A Novel Technique for Generating and Observing Chemiluminescence in a Biological Setting
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Last Updated: Dec 25, 2025

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A Novel Technique for Generating and Observing Chemiluminescence in a Biological Setting
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科学领域:

  • 无机化学
  • 材料科学
  • 摄影化学

背景情况:

  • 双核 (III) 复合物通常具有短暂的三重状态,导致弱光发光.
  • 克服这一局限性对于开发高效光材料至关重要.

研究的目的:

  • 设计和合成具有增强光发光的新型双核 (III) 复合物.
  • 研究这些复合物的光物理特性和在照明和有机发光二极管 (OLED) 中的潜在应用.

主要方法:

  • 使用捐赠体-接受体类型的氧化-基酸盐合成双核 (Pt2a-Pt2c).
  • 光发光光谱 (溶液,晶体粉末,薄膜) 用于表征辐射特性.
  • 用于电子过渡分析的时间依赖密度函数理论 (TD-DFT).
  • 使用Pt2a作为发射器的有机发光二极管 (OLED) 的制造和测试.

主要成果:

  • Pt2a-Pt2c复合体表现出强烈的光与d7电子配置.
  • Pt2a显示溶液中的色辐射 (618 nm) 和近红外辐射 (NIR) (749 nm在粉末中,704 nm在薄膜中).
  • 机械磨Pt2a会产生蓝色转移的辐射,表明分子间相互作用.
  • TD-DFT证实了最低的电子过渡作为桥接联体-金属-金属电荷转移 (LMMCT).
  • 使用 Pt2a 制造的 OLED 可实现高效率的 NIR (716 nm),红 (614 nm) 和白光发射.

结论:

  • 设计的双核 (III) 复合体具有长寿命的三重状态和强烈的光.
  • 这些复合体显示出在照明和高性能OLED应用方面的巨大潜力.
  • 这项研究强调了使用D-A类合物来增强双核复合物的光发光的成功策略.