无水化物在层次金属有机框架中的合成后修饰
Shoushun Chen1, Zhongxin Song2,3, Jinghui Lyu1,4
1Department of Chemistry, The University of Western Ontario, London, Ontario, Canada N6A 5B7.
Journal of the American Chemical Society
|February 11, 2020
概括
研究人员开发了一种新的金属有机框架 (MOF) 后合成修饰 (PSM) 平台,使用层级多孔的MIL-121中的无水化. 这种方法可以为先进的MOF材料多样化纳入各种分子和金属复合物.
科学领域:
- 材料科学
- 纳米技术
- 化学工程
背景情况:
- 金属有机框架 (MOF) 是各种应用中至关重要的多功能多孔材料.
- 合成后修饰 (PSM) 通过功能化有机连接剂来增强MOF的特性.
- 现有的PSM方法在结合多种分子和复合物方面存在局限性.
研究的目的:
- 建立使用无水化功能组的MOF的PSM新平台.
- 为了利用无水化合物的反应性和层次性孔隙性来实现MOF功能化.
- 展示平台在整合各种客分子和金属复合物的能力.
主要方法:
- 将无水化物功能组引入到层次多孔的MOF (MIL-121).
- 各种客分子 (酒精,氨基,硫醇) 与无水化组的共价结合.
- 将贵金属 (Pt(II) /Pt(IV)) 复合物纳入功能化MOF.
- 对不同尺寸的客人进行层次性孔隙利用的演示.
主要成果:
- 无水化物功能化的MOF (MIL-121) 对各种客分子具有很高的反应性.
- 层次性毛孔促进了小型 (甲醇) 到大型 (多芳香胺) 客体的结合.
- 贵金属复合物,包括Pt{II}/Pt{IV},已经成功地融入MOF结构.
- 合成了一种基于Pt的电催化剂,该电催化剂对氧降解反应 (ORR) 具有很好的活性.
结论:
- 一个基于无水化功能化的MOF新型有效的PSM平台已经开发出来.
- 这种方法为结合多种有机分子和金属复合物提供了一种多功能策略.
- 开发的基于MOF的电催化剂在燃料电池和储能领域具有很大的应用潜力.
相关概念视频
01:07Preparation of Acid Anhydrides
3.8K
One of the methods for preparing symmetrical or unsymmetrical acid anhydrides involves the treatment of acid chlorides with the sodium salt of carboxylic acids. The reaction proceeds via a nucleophilic acyl substitution.
The carboxylate ion acts as a nucleophile that attacks the carbonyl carbon of the acid chloride to form a tetrahedral intermediate. Subsequently, the re-formation of the carbonyl group with the loss of the chloride ion as a leaving group leads to the formation of an acid...
The carboxylate ion acts as a nucleophile that attacks the carbonyl carbon of the acid chloride to form a tetrahedral intermediate. Subsequently, the re-formation of the carbonyl group with the loss of the chloride ion as a leaving group leads to the formation of an acid...
3.8K
01:23Properties of Organometallic Compounds
1.5K
Organometallic compounds are compounds that contain a carbon–metal bond. Carbon belongs to an organyl group like alkyl, aryl, allyl, or benzyl groups. The metal can be from Group I or Group II of the periodic table, a transition metal, or a semimetal.
1.5K
02:51Metal-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...
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...
23.5K
01:19Reactions of Acid Anhydrides
5.0K
The reactions of acid anhydrides are analogous to the reactions of acid chlorides and proceed via a nucleophilic acyl substitution. They only differ in the identity of the leaving group. During an acid chloride reaction, the leaving group is a chloride ion, and the by-product is hydrochloric acid. However, in an acid anhydride reaction, the leaving group is a carboxylate ion, and the by-product is a carboxylic acid.
5.0K
02:34Structural Isomerism
21.4K
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...
21.4K
01:16Nomenclature of Carboxylic Acid Derivatives: Acid Halides, Esters, and Acid Anhydrides
5.6K
Naming Acid Halides
The IUPAC and common names of acid halides are derived from the corresponding carboxylic acids, by changing “ic acid” to “yl halide.” For example, as shown below, the IUPAC name ethanoyl chloride is derived from ethanoic acid, and the common name, acetyl chloride, is obtained from acetic acid.
The IUPAC and common names of acid halides are derived from the corresponding carboxylic acids, by changing “ic acid” to “yl halide.” For example, as shown below, the IUPAC name ethanoyl chloride is derived from ethanoic acid, and the common name, acetyl chloride, is obtained from acetic acid.
5.6K