相关实验视频
Updated: May 5, 2026

08:03
Maintenance of a Drosophila melanogaster Population Cage
Published on: March 15, 2016
17.5K
子组件交换 转换一个 FeII4L4 从高旋转到低旋转,在双系统中切换客户释放
Anna J McConnell1, Catherine M Aitchison1, Angela B Grommet1
1Department of Chemistry, University of Cambridge , Lensfield Road, Cambridge CB2 1EW, United Kingdom.
Journal of the American Chemical Society
|April 21, 2017
概括
在高旋转和低旋转状态之间,子组件交换转化铁. 这种旋转转变调节了子的反应性,并允许对刺激有反应的客体释放,证明了可调节的分子系统.
科学领域:
- 超分子化学
- 协调化学
- 材料科学
背景情况:
- 铁 (II) 协调表现出旋转状态多态,影响它们的特性.
- 控制金属有机中的旋转转变对于设计响应材料至关重要.
研究的目的:
- 调查分部件交换作为铁交换的方法.
- 探索旋转状态变化对子反应和客人的释放的影响.
- 使用不同的铁设计一个对双刺激有反应的系统.
主要方法:
- 合成和描述Fe (II) 4L4.
- 涉及基于的配体的子组件交换反应.
- 谱分析以确定旋转状态 (例如,UV-Vis,SQUID).
- 由外部刺激引发的客体释放研究.
主要成果:
- 高旋转Fe (II) 4L41通过连接物交换转化为低旋转Fe (II) 4L42.
- 1中的旋转增强了它对电子丰富的线的反应性.
- 一个由两个子 (1和3) 组成的系统根据刺激添加的顺序进行了选择性释放.
- 添加2formylpyridine调节了系统对后续添加p-anisidine的反应.
结论:
- 小组件交换提供了一个可行的途径来调整铁的旋转状态和反应性.
- 观察到的刺激响应行为的调节突出显示了分子系统中复杂逻辑门的潜力.
- 这项工作为开发具有量身定制响应的复杂分子装置提供了途径.
相关概念视频
One-Degree-of-Freedom System
1.0K
In mechanical engineering, one-degree-of-freedom systems form the basis of a wide range of electrical and mechanical components. Using these models, engineers can predict the behavior of various parts in a larger system, which gives them insight into how different forces interact with each other.
A one-degree-of-freedom system is defined by an independent variable that determines its state and behavior. One example of a one-degree-of-freedom system is a simple harmonic oscillator, such as a...
A one-degree-of-freedom system is defined by an independent variable that determines its state and behavior. One example of a one-degree-of-freedom system is a simple harmonic oscillator, such as a...
1.0K
Transformers in Distribution System
682
Transformers in distribution systems can be broadly categorized into distribution substation transformers and other distribution transformers. They are crucial for stepping down high transmission voltages to levels suitable for distribution and end-user applications.
Distribution substation transformers come in various ratings and typically use mineral oil for insulation and cooling. To prevent moisture and air from entering the oil, some transformers use an inert gas like nitrogen to fill the...
Distribution substation transformers come in various ratings and typically use mineral oil for insulation and cooling. To prevent moisture and air from entering the oil, some transformers use an inert gas like nitrogen to fill the...
682
Transformers with Off-Nominal Turns Ratios
739
In scenarios involving parallel transformers with disparate ratings, developing per-unit models requires accommodating off-nominal turns ratios. This situation arises when the selected base voltages are not proportional to the transformer’s voltage ratings. Consider a transformer where the rated voltages are related by the term a. If the chosen voltage bases satisfy a relationship involving term b, term c is defined as the ratio of these bases. This ratio is then substituted into the...
739
Fluid Movement Between Compartments
4.2K
The force applied by fluids against a surface, known as hydrostatic pressure, initiates the transfer of fluid among different compartments. Within our blood vessels, the blood's hydrostatic pressure is a result of the heart's pumping action. At the arteriolar end of capillaries, hydrostatic pressure (capillary blood pressure) exceeds the opposing colloid osmotic pressure created primarily by plasma proteins like albumin. This discrepancy in pressure propels plasma and nutrients from the...
4.2K
Design Example: Forces in Sluice Gate
4.0K
In hydraulic engineering, sluice gates are essential for managing water flow through channels, reservoirs, and irrigation systems. Sluice gates, acting as vertical barriers, regulate water by adjusting the gate's opening height, which changes the velocity and pressure of water flowing beneath the gate. Understanding the forces involved is crucial to designing sluice gates that can withstand dynamic pressure differences, especially when the gate is closed or partially open.
Key variables in...
Key variables in...
4.0K
Transformation
1.3K
Microbial communities are dynamic environments where cell lysis releases free DNA into the surroundings. Other cells can take up this extracellular DNA through a process known as transformation.When a cell incorporates this foreign DNA into its genome, resulting in genetic modification, the process is known as transformation. Cells capable of this process are termed competent. Competence can be natural, as observed in certain bacteria and archaea, or artificially induced in the...
1.3K

