一个同源系列的宏循环Ni集群:合成,结构和催化性质
Huixin Xiang1,2, Ranran Cheng2, Chenhao Ruan1,2
1Strait Institute of Flexible Electronics, Fujian Normal University, Fuzhou 350117, China. ifechhyao@fjnu.edu.cn.
Nanoscale
|February 2, 2024
概括
研究人员使用4 - 甲基二醇合成了新的宏环-硫酸盐集群. 这些稳定的集群表现出大小依赖的p-nitrophenol降解的催化活性,提供了对结构性质关系的见解.
科学领域:
- 协调化学 协调化学
- 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:
- 具有引人注目的环状结构的-酸盐集群显示出各种应用的前景.
- 由于合成和结构复杂性,研究较大的宏环集群 (n > 8) 存在挑战.
研究的目的:
- 合成和表征一个同类系列的宏环集群,其环形大小从9到12.
- 探索结构-属性关系,重点关注电子结构,稳定性和催化活性.
- 为了建立一个简单的合成方法,用于宏循环的同质集群.
主要方法:
- 合成Ni_n(4MPT)_2 (n = 9-12) 使用4-甲基二醇 (4MPT) 配体.
- 通过单晶X射线衍射 (SXRD) 和电喷离子质谱法 (ESI-MS) 进行结构和组成分析.
- 理论计算以了解电子结构和稳定性.
主要成果:
- 成功制造了一系列同源的宏环集群,Ni_n(4MPT)_2 (n = 9-12).
- 电子结构在很大程度上保持不变,随着原子数量的增加.
- 在[NiS4]子单元内强大的Ni-S协调赋予了显著的集群稳定性.
- 集群显示出对p-nitrophenol降解的优良催化活性,活性与环大小线性相关.
结论:
- 已经开发出一种简单的方法来合成宏环同质集群.
- 协调相互作用是这些集群稳定的关键.
- 已经确定了一个明确的结构-属性相关性,特别是催化活性和环大小之间的相关性.
相关概念视频
01:11Nomenclature of Carboxylic Acid Derivatives: Amides and Nitriles
4.0K
Naming Amides
The IUPAC and common names of amides are derived from the parent carboxylic acid, by replacing the suffix “oic acid” and “ic acid,” respectively, with “amide.” In the following example, the IUPAC name ethanamide is derived from ethanoic acid, and the common name, acetamide, is obtained from acetic acid.
The IUPAC and common names of amides are derived from the parent carboxylic acid, by replacing the suffix “oic acid” and “ic acid,” respectively, with “amide.” In the following example, the IUPAC name ethanamide is derived from ethanoic acid, and the common name, acetamide, is obtained from acetic acid.
4.0K
02:34Structural Isomerism
19.2K
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...
19.2K
02:39Nomenclature of Alkynes
18.4K
Alkynes are unsaturated hydrocarbons characterized by the presence of carbon-carbon triple bonds and have a general formula CnH2n-2. The nomenclature of alkynes follows a set of rules similar to alkanes and alkenes; however, alkynes bear the suffix "-yne" instead of "-ane" or "-ene." There are two approaches to naming alkynes:
18.4K
01:32Aldehydes and Ketones with HCN: Cyanohydrin Formation Overview
2.8K
Cyanohydrins are compounds that contain –CN and –OH groups on the same carbon atom. They are formed by the nucleophilic addition of the cyanide ions to the carbonyl group. Cyanide ions are highly basic and nucleophilic and can be generated from HCN under aqueous conditions. However, since HCN is a weak acid, the number of cyanide ions generated is very small. Hence, a small amount of base or KCN/NaCN is added to HCN to increase the concentration of the cyanide ions in the reaction...
2.8K
02:52Stereoisomerism
11.9K
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...
11.9K
02:28Cycloalkanes
12.7K
Cycloalkanes are saturated cyclic hydrocarbons with carbon atoms arranged in the form of rings. They have two fewer hydrogen atoms than the corresponding acyclic alkane; therefore, their general formula is CnH2n. The structural formulas of cycloalkanes are simplified using the line-angle representation. The regular polygons are used to represent the cycloalkane rings, with each side representing a carbon-carbon bond.
The IUPAC nomenclature of cycloalkanes follows similar rules that apply to...
The IUPAC nomenclature of cycloalkanes follows similar rules that apply to...
12.7K