三甲酸:一种新兴的多功能和强大的多酸连接体类,用于催化和材料应用
James McQuade1, Frieder Jäkle1
1Department of Chemistry, Rutgers University Newark, 73 Warren Street, Newark, New Jersey 07102, USA. fjaekle@rutgers.edu.
Dalton transactions (Cambridge, England : 2003)
|July 18, 2023
概括
新的以基为基础的子酸配体,tris(pyridyl) borates (Tpyb),为金属复合物提供了增强的特性. 这些连接体通过新的设计和功能化路径推进催化和材料科学.
科学领域:
- 协调化学 协调化学
- 有机金属化学 有机金属化学
- 材料科学 材料科学 材料科学
- 催化剂是一种催化剂.
背景情况:
- 包含基的三酸连接体,称为"子酸"连接体,正在获得突出地位.
- 这些配体比传统的酸具有优势,包括增强的电子捐赠和稳定性.
- 三甲酸 (Tpyb) 连接体架构在功能金属复合体研究中越来越多地被采用.
研究的目的:
- 探索三甲酸 (Tpyb) 配体在开发新型功能性金属复合物的潜力.
- 研究TPyb复合体,用于催化和材料科学中的应用.
- 检查新的连接体设计,使异体质复合体和复合后功能化成为可能.
主要方法:
- 三甲酸 (Tpyb) 配体及其金属复合物的合成和表征.
- 对称八面体 (ML2) 和异体质金属复合物的研究.
- 通过中心的电友和核友替代进行复杂化后功能化的探索.
主要成果:
- 与pyrazolyl类似物相比,tpyb联体提供了增强的电子捐赠,稳定性和不同的金属中心几何.
- 新的连接体设计使人们更容易进入具有空位的异构性金属复合体,适合催化.
- 在TPyb配体的复杂化后功能化方面取得的重大进展扩大了与功能材料的集成可能性.
结论:
- 三 (pyridyl) 酸盐 (Tpyb) 连接体代表了一个多功能平台,用于创建先进的功能金属复合体.
- 这些复合体对催化和材料科学领域的创新应用具有重大前景.
- 对Tpyb连接体功能化的进一步研究可以为材料集成和机理学研究开辟新的途径.
相关概念视频
01:22EDTA: Chemistry and Properties
2.0K
Polydentate ligands are most widely used in complexometric titrations because they form more stable complexes with the metal ions than mono- or bidentate ligands due to the chelate effect. Examples of polydentate ligands are ethylenediaminetetraacetic acid (EDTA), crown ethers, and cryptands. The most important feature of optimal polydentate ligands is the ability to form 1:1 complexes in a single-step process. Amino carboxylic acid derivatives are frequently used as complexing agents. EDTA is...
2.0K
00:43Complexometric Titration: Ligands
1.0K
Different monodentate and polydentate ligands are used as complexing agents in complexometric titration reactions. The formation of complexes by mono- and bidentate ligands involves two or more intermediate steps, limiting their use as complexing agents. In comparison, polydentate ligands can form complexes with metal ions in a single-step process, facilitating sharper end points. This means polydentate ligands, such as amino carboxylic acid derivatives, are most commonly employed in...
1.0K
02:51Metal-Ligand Bonds
21.1K
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...
21.1K
01:19Complexation Equilibria: The Chelate Effect
563
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...
563
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
02:47Alkynes to Aldehydes and Ketones: Hydroboration-Oxidation
18.3K
Introduction
One of the convenient methods for the preparation of aldehydes and ketones is via hydration of alkynes. Hydroboration-oxidation of alkynes is an indirect hydration reaction in which an alkyne is treated with borane followed by oxidation with alkaline peroxide to form an enol that rapidly converts into an aldehyde or a ketone. Terminal alkynes form aldehydes, whereas internal alkynes give ketones as the final product.
One of the convenient methods for the preparation of aldehydes and ketones is via hydration of alkynes. Hydroboration-oxidation of alkynes is an indirect hydration reaction in which an alkyne is treated with borane followed by oxidation with alkaline peroxide to form an enol that rapidly converts into an aldehyde or a ketone. Terminal alkynes form aldehydes, whereas internal alkynes give ketones as the final product.
18.3K