银酸盐改性环氧或氨基终结液体橄乙烯的结构和高分子组织
I N Senchikhin1, P V Konarev2, V V Volkov2
1A.N. Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, 31, Bldg. 4, Leninskiy Prospekt, Moscow 119071, Russia.
The Journal of chemical physics
|March 6, 2025
概括
银酸盐在二甲酸中形成纳米粒子,但在二胺中产生复合物. 这项研究探讨了新型纳米复合材料的寡合物-银相互作用.
科学领域:
- 材料科学 材料科学 材料科学
- 纳米技术纳米技术
- 物理化学 物理化学
背景情况:
- 研究不同非水性寡合基介质中的银酸盐相互作用对于开发先进材料至关重要.
- 了解液态寡合体中银离子的化学行为,可以为功能纳米复合材料的设计提供信息.
研究的目的:
- 研究酸银在芳香和酸二甲基乙烯和酸二胺中的行为和反应途径.
- 描述由此产生的银物种及其在这些寡合环境中的相互作用.
- 为创造具有定制性质的新型寡合体-银纳米复合材料奠定基础.
主要方法:
- 紫外线可见光谱测量用于监测反应动力学.
- 动态光散射用于分析粒子形成.
- 用X射线吸收光谱 (XANES和EXAFS) 来确定银的局部原子环境和协调.
- 微角X射线散射 (SAXS) 用于研究复杂和关联的形成.
主要成果:
- 银纳米颗粒的形成被观察到在diglycidyl oligomers中,并研究了反应动力学.
- 在阿里法胺中,银离子形成了一个复杂的化合物,而不是纳米颗粒,由XANES/EXAFS证实.
- 萨克斯在银酸盐溶液中发现了寡胺分子的扩展形态复合物和协同物.
结论:
- 介质决定了酸银相互作用的结果:在迪格利乙烯中形成纳米粒子,在阿利法酸二胺中复合.
- 胺复合体中银的协调数可能是三,具有特定的原子环境.
- 这些发现支持开发具有独特光学和杀菌特性的新型寡合物-银纳米复合材料.
相关概念视频
02:38Structure and Nomenclature of Epoxides
6.3K
Cyclic ethers are heterocyclic compounds with an oxygen atom in the ring along with carbon atoms. They are named depending on the number of carbon atoms present in their ring system. Cyclic ethers with a three-membered ring system are called “oxirane”, four-membered ring systems as “oxetane”, five-membered ring systems as “oxolane”, and six-membered ring systems as “oxane”. The cyclic structure of these rings imposes angle strain, and this strain...
6.3K
01:28Structures of Carboxylic Acid Derivatives
2.3K
Structure of Carboxylic Acid Derivatives
Carboxylic acid derivatives contain an acyl group attached to a heteroatom such as chlorine, oxygen, or nitrogen. The carbonyl carbon and oxygen are both sp2-hybridized with an unhybridized p orbital.
The three sp2 orbitals of the carbonyl carbon form three σ bonds, one each with the carbonyl oxygen, the α carbon, and the heteroatom, whereas the other two sp2 orbitals of the carbonyl oxygen are occupied by the lone pairs. Further, the...
Carboxylic acid derivatives contain an acyl group attached to a heteroatom such as chlorine, oxygen, or nitrogen. The carbonyl carbon and oxygen are both sp2-hybridized with an unhybridized p orbital.
The three sp2 orbitals of the carbonyl carbon form three σ bonds, one each with the carbonyl oxygen, the α carbon, and the heteroatom, whereas the other two sp2 orbitals of the carbonyl oxygen are occupied by the lone pairs. Further, the...
2.3K
02:34Structural Isomerism
19.1K
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...
19.1K
02:28Structure and Nomenclature of Ethers
11.0K
Structure and Bonding
Ethers are organic compounds with an ether functional group which is characterized by an oxygen atom connected to two — identical or different — alkyl, aryl, or vinyl groups. The C–O–C linkage in dimethyl ether — the simplest ether — has an approximately tetrahedral bond angle of 110.3 degrees. The oxygen atom is sp3- hybridized, with the C–O distance being about 140 pm.
Classification of Ethers
Based on their attached substituent...
Ethers are organic compounds with an ether functional group which is characterized by an oxygen atom connected to two — identical or different — alkyl, aryl, or vinyl groups. The C–O–C linkage in dimethyl ether — the simplest ether — has an approximately tetrahedral bond angle of 110.3 degrees. The oxygen atom is sp3- hybridized, with the C–O distance being about 140 pm.
Classification of Ethers
Based on their attached substituent...
11.0K
01:19Structure of Amines
2.4K
The hybridized nitrogen atom in amines possesses a lone pair of electrons and is bound to three substituents with a bond angle of around 108°, which is less than the tetrahedral angle of 109.5°. However, the C–N–H bond angle is slightly larger at 112°, with a carbon–nitrogen bond length of 147 pm. This carbon–nitrogen bond length of of amines is longer than the carbon–oxygen bond of alcohols (143 pm) but shorter than alkanes’...
2.4K
02:26Base-Catalyzed Ring-Opening of Epoxides
8.2K
Due to their highly strained structures, epoxides can readily undergo ring-opening reactions through nucleophilic substitution, either in the presence of an acid or a base. The nucleophilic substitution reactions in the presence of acid are called acid-catalyzed ring-opening reactions, and nucleophilic substitution reactions in the presence of a base are called base-catalyzed ring-opening reactions. Epoxides undergo base-catalyzed ring-opening reactions in the presence of a strong nucleophile...
8.2K