金属有机框架MIL-125的散装到表面的质子合电子转移反应性
Caroline T Saouma1,2, Sarah Richard1, Simon Smolders3
1Department of Chemistry , University of Washington , Box 351700, Seattle , Washington 98195-1700 , United States.
Journal of the American Chemical Society
|November 6, 2018
概括
金属有机框架MIL-125在紫外线照射时经历了石化质子合电子转移 (PCET) 反应. 这种光降解,由激素定位证明,发生在整个散装材料中,表明MOF结构中的移动电子和质子.
科学领域:
- 材料科学
- 摄影化学
- 纳米技术
背景情况:
- 金属有机框架 (MOF) 是具有可调节性质的高级多孔材料.
- 质子合电子转移 (PCET) 对许多化学和生物过程至关重要.
- 了解MOF的氧化还原行为是它们在能量储存和催化中的应用的关键.
研究的目的:
- 在MOF MIL-125中研究静电质子合电子转移 (PCET) 反应.
- 量化光减电的程度和电荷存储在MOF的位置.
- 阐明MIL-125在紫外线照射下电荷转移和储存的机制.
主要方法:
- 使用紫外线和2-propanol进行MIL-125的光降解.
- 用2,4,6-三丁基对光减小的MIL-125进行定位.
- 核磁共振 (NMR) 光谱分析反应产物和孔隙可访问性.
- 对可溶性集群 (Ti8O8 ((OOC^tBu) 16) 的研究进行比较.
主要成果:
- 每个Ti8节点的MIL-125被静电减小到2~e/H+.
- 这种光降解发生在MOF的大部分区域,不论粒子大小如何.
- 激素定位的产物对孔隙来说太大了,表明表面反应.
- 使用纯电子受体的氧化产生了多种产物,突出显示了对联e/H+去除的需要.
结论:
- 通过移动的电子和质子展现大量的光充电.
- 在这种MOF中,PCET反应对于有效的电荷转移和储存至关重要.
- 描述的方法为氧化还原活性多孔材料提供了一个简单的表征技术.
相关概念视频
Ionic Bonding and Electron Transfer
49.1K
Ions are atoms or molecules bearing an electrical charge. A cation (a positive ion) forms when a neutral atom loses one or more electrons from its valence shell, and an anion (a negative ion) forms when a neutral atom gains one or more electrons in its valence shell. Compounds composed of ions are called ionic compounds (or salts), and their constituent ions are held together by ionic bonds: electrostatic forces of attraction between oppositely charged cations and anions.
49.1K
Types of Genetic Transfer Between Organisms
30.7K
Genetic transfer occurs when genetic information is passed from one organism to another. It occurs via two mechanisms: vertical gene transfer and horizontal gene transfer. Vertical gene transfer occurs when genetic information is transferred from one generation to the next, which happens much more frequently than horizontal gene transfer. Both sexual and asexual reproduction are forms of vertical gene transfer, where one or more organisms pass some or all of their genome onto their progeny.
30.7K
Types of Genetic Transfer Between Organisms
6.4K
6.4K
Alkali Metals
24.6K
Group 1 elements are soft and shiny metallic solids. They are malleable, ductile, and good conductors of heat and electricity. The melting points of the alkali metals are unusually low for metals and decrease going down the group, while the density increases going down the group with the exception of potassium (Table 1).
Table 1: Properties of the alkali metals
Table 1: Properties of the alkali metals
24.6K
Electron Transport Chains
112.2K
The final stage of cellular respiration is oxidative phosphorylation that consists of two steps: the electron transport chain and chemiosmosis. The electron transport chain is a set of proteins found in the inner mitochondrial membrane in eukaryotic cells. Its primary function is to establish a proton gradient that can be used during chemiosmosis to produce ATP and generate electron carriers, such as NAD+ and FAD, that are used in glycolysis and the citric acid cycle.
The ETC is comprised of...
The ETC is comprised of...
112.2K
Bonding in Metals
52.4K
Metallic bonds are formed between two metal atoms. A simplified model to describe metallic bonding has been developed by Paul Drüde called the “Electron Sea Model”.
52.4K


