引入碳酸集群到晶体框架通过醇-烯点击化学的能量材料
Tian-Li Pu1,2, Xu-Yang Wang2, Zhi-Bing Sun2
1College of Chemistry and Chemical Engineering, Henan Polytechnic University, Jiaozuo, 454000, China.
Angewandte Chemie (International ed. in English)
|March 18, 2024
概括
研究人员通过 thiol-yne 合增强了能量晶体框架. 这种方法增加了46.6%的能量密度,并显著减少了点火延迟时间,为先进的能量材料铺平了道路.
科学领域:
- 材料科学 材料科学 材料科学
- 化学 化学 化学
- 纳米技术 纳米技术
背景情况:
- 晶体框架是先进的材料,对能源应用越来越感兴趣.
- 现有的多孔能源框架经常受到减少的能源输出的影响.
- 烯合,一种无金属的点击反应,在晶体框架修改中仍然在很大程度上未被探索.
研究的目的:
- 为了研究二烯合对增强能量晶体框架的有效性.
- 通过点击化学,将一种富含能量的硫醇,即1,2-二碳二二甲-1-硫醇 (CB-SH) 引入框架.
- 评估这种修改对能量密度,点火性能和稳定性的影响.
主要方法:
- 合成了一种乙功能化的框架,Zn(AIm) 2.
- 通过 thiol-yne 点击反应,用 1,2-dicarbadodecaborane-1-thiol (CB-SH) 装饰了框架.
- 修改后的框架的特点是能量密度,用红色烟雾酸的点火延迟时间和稳定性.
- 使用密度函数理论 (DFT) 计算来理解点火机制.
主要成果:
- 实现了46.6%的能量密度增加.
- 减少了六倍的点火延迟时间,达到4.5毫秒.
- 观察到材料稳定性的显著提升.
- DFT的计算揭示了CB-SH.SH的高高球点火促进机制.
结论:
- 乙烯点击反应是装饰晶体框架的可行策略.
- 这种修改方法有效地提高了能量密度和点火性能.
- 开发的方法使得能够设计出新型,高性能,高能量的晶体材料.
相关概念视频
01:18β-Dicarbonyl Compounds via Crossed Claisen Condensations
3.1K
Crossed Claisen condensations are base-promoted reactions between two different ester molecules producing β-dicarbonyl compounds. The reaction involving esters, with both containing α hydrogen, results in a mixture of four different products that are difficult to isolate. This reduces the synthetic utility of the reaction.
3.1K
![[4+2] Cycloaddition of Conjugated Dienes: Diels–Alder Reaction](/_next/image?url=https%3A%2F%2Fcloudfront.jove.com%2Ffiles%2Fmedia%2Fscience-education%2Fscience-education-thumbs%2F12417.jpg&w=3840&q=75)
01:16[4+2] Cycloaddition of Conjugated Dienes: Diels–Alder Reaction
10.1K
The Diels–Alder reaction is an example of a thermal pericyclic reaction between a conjugated diene and an alkene or alkyne, commonly referred to as a dienophile. The reaction involves a concerted movement of six π electrons, four from the diene and two from the dienophile, forming an unsaturated six-membered ring. As a result, these reactions are classified as [4+2] cycloadditions.
10.1K
02:35Electrophilic Addition to Alkynes: Hydrohalogenation
9.9K
Electrophilic addition of hydrogen halides, HX (X = Cl, Br or I) to alkenes forms alkyl halides as per Markovnikov's rule, where the hydrogen gets added to the less substituted carbon of the double bond. Hydrohalogenation of alkynes takes place in a similar manner, with the first addition of HX forming a vinyl halide and the second giving a geminal dihalide.
9.9K
01:14Electrophilic 1,2- and 1,4-Addition of X2 to 1,3-Butadiene
2.5K
Electrophilic addition of halogens to alkenes proceeds via a cyclic halonium ion to form a 1,2-dihalide or a vicinal dihalide.
2.5K
01:15α-Bromination of Carboxylic Acids: Hell–Volhard–Zelinski Reaction
3.0K
The method to achieve α-brominated carboxylic acids using a mixture of phosphorus tribromide and bromine is known as the Hell–Volhard–Zelinski reaction. The reaction is catalyzed by phosphorus tribromide, which can be used directly or produced in situ from red phosphorus and bromine. The mechanism comprises PBr3 catalyzed conversion of acid to acid bromide and hydrogen bromide. The acid bromide enolizes to its enol form in the presence of HBr. The nucleophilic enol attacks the...
3.0K
01:20Diazonium Group Substitution with Halogens and Cyanide: Sandmeyer and Schiemann Reactions
1.9K
Arenediazonium substitution reactions occur when the diazonium group is substituted by various functional groups such as halides, hydroxyl, nitrile, etc. For instance, arenediazonium salts react with copper(I) salts of chloride, bromide, or cyanide to form corresponding aryl chlorides, bromides, and nitriles. These reactions are named Sandmeyer reactions. Although the mechanism of this reaction is complicated, as illustrated in Figure 1, they are believed to progress via an aryl copper...
1.9K