基基基甲:高性能能量盐,敏感性降低
Prachi Bhatia1, Krishna Pandey1, Priyanka Das1
1Energetic Materials Laboratory, Department of Chemistry, Indian Institute of Technology Roorkee, Roorkee-247667, Uttarakhand, India. dheeraj.kumar@cy.iitr.ac.in.
Chemical communications (Cambridge, England)
|November 2, 2023
概括
研究人员通过将基基组引入基功能化双二醇甲来开发出新型的能量材料. 这些新化合物表现出卓越的稳定性和能量性能,在能量材料科学中提供了潜在的进步.
科学领域:
- 能量材料科学 能量材料科学
- 有机化学 有机化学
- 材料科学 材料科学 材料科学
背景情况:
- 高性能能量材料需要提高物理稳定性和可调节性质.
- 现有的基于Pyrazole的能量材料在性能微调方面存在局限性.
- N-基化-4-基-3,5-丁皮醇是一种未被充分研究的化合物类.
研究的目的:
- 合成和描述基于N-化-4-基-3,5-丁皮醇的新能源材料.
- 研究基功能对物理稳定性和能量性能的影响.
- 为了探索化盐的形成,以提高其性能.
主要方法:
- 合成1,1'-甲基二 ((3,5-丁-1H-皮拉-4-ol) 和其能量盐.
- 合成化合物的表征.
- 希尔什菲尔德表面分析,静电电位分析,芳香性研究,以及梅耶尔-邦德结构-属性关系的顺序分析.
- 与现有的酸盐和亚酸盐替代的酸盐进行比较.
主要成果:
- 与氨基替代剂相比,引入基功能改善了氧气平衡和能量.
- 与和亚替代剂相比,合成的化合物显示出增强的敏感性.
- 狄卡盐的形成显著改善了物理和热稳定性和能量性能.
- 通过计算分析阐明了结构-属性关系.
结论:
- N-基化-4-基-3,5-丁皮醇是具有可调节性质的有前途的能量材料.
- 狄卡盐的形成是提高基于pyrazole的能量材料的稳定性和性能的一种可行的策略.
- 这项研究为新型能量化合物的结构-性质关系提供了宝贵的见解.
相关概念视频
01:19Diazonium Group Substitution: –OH and –H
2.8K
Nitrous acid, a weak acid, is prepared in situ via the reaction of sodium nitrite with a strong acid under cold conditions. This nitrous acid prepared in situ reacts with primary arylamines to form arenediazonium salts. Such reactions are known as diazotization reactions. As shown in Figure 1, the formation of arenediazonium salts begins with the decomposition of nitrous acid in an acidic solution to give nitrosonium ions.
2.8K
01:14Nucleophilic Aromatic Substitution of Aryldiazonium Salts: Aromatic SN1
2.1K
Treating arylamines with nitrous acid gives aryldiazonium salts that are effective substrates in nucleophilic aromatic substitution reactions. The diazonio group in these salts can be easily displaced by different nucleophiles, yielding a wide variety of substituted benzenes. The leaving group departs as nitrogen gas, and this easy elimination is the driving force for the substitution reaction.
In the Sandmeyer reaction, for example, the diazonio group is replaced by a chloro, bromo,...
In the Sandmeyer reaction, for example, the diazonio group is replaced by a chloro, bromo,...
2.1K
01:261° Amines to Diazonium or Aryldiazonium Salts: Diazotization with NaNO2 Overview
3.3K
Nitrous acid and nitric acids are two types of acids containing nitrogen, among which nitrous acid is weaker than nitric acid. Nitrous acid with a pKa value of 3.37 ionizes in water to give a nitrite ion and the hydronium ion.
The nitrous acid is unstable. Hence, it is formed in situ from a solution of sodium nitrite and cold aqueous acids such as hydrochloric or sulfuric acid. In an acidic solution, the –OH group of nitrous acid undergoes protonation to give oxonium ion, followed by...
The nitrous acid is unstable. Hence, it is formed in situ from a solution of sodium nitrite and cold aqueous acids such as hydrochloric or sulfuric acid. In an acidic solution, the –OH group of nitrous acid undergoes protonation to give oxonium ion, followed by...
3.3K
01:371° Amines to Diazonium or Aryldiazonium Salts: Diazotization with NaNO2 Mechanism
3.8K
Nitrous acid is a relatively weak and unstable acid prepared in situ by the reaction of sodium nitrite and cold, dilute hydrochloric acid. In an acidic solution, the nitrous acid undergoes protonation when it loses water to form a nitrosonium ion—an electrophile. Nitrous acid reacts with primary amines to give diazonium salts. The reaction is called diazotization of primary amines.
3.8K
01:25Basicity of Heterocyclic Aromatic Amines
6.1K
Heterocyclic amines, where the N atom is a part of an alicyclic system, are similar in basicity to alkylamines. Interestingly, the heterocyclic amine having a nitrogen atom as part of an aromatic ring has much less basicity than its corresponding alicyclic counterpart. For this reason, as presented in Figure 1, piperidine (pKb = 2.8) is significantly more basic than pyridine (pKb = 8.8).
6.1K
01:33Carboxylic Acids to Methylesters: Alkylation using Diazomethane
2.2K
Carboxylic acids react with diazomethane in an ether solvent via alkylation at the carboxylate oxygen atom to give methyl esters of the corresponding acid with excellent yields.
2.2K