通过四乙烯/复合三维共价有机框架组件的光可视化
Yingying Ren1, Wenze Wu1, Yuxuan Lu2
1Center of Materials Science and Optoelectronics Engineering, College of Materials Science and Opto-Electronic Technology, University of Chinese Academy of Sciences, Beijing 101408, China.
Journal of the American Chemical Society
|May 28, 2025
概括
新的双光三维共价有机框架 (3D-COF) 允许光成像应变分布. 这些材料还可视化各种介质的表面摩擦和流速,具有高灵敏度和可逆性.
科学领域:
- 材料科学
- 化学学
- 纳米技术
背景情况:
- 材料中应变分布的动态可视化存在重大挑战.
- 开发用于敏感和可逆光学测量的先进材料至关重要.
研究的目的:
- 合成新的双三维共价有机框架 (3D-COF) 和它们的PEGylated对应物 (PEG-3D-COF).
- 建立物理交互组件以进行应变,表面摩擦和流速分布的光成像.
- 在各种介质中研究这些COF的响应性.
主要方法:
- 双化3D-COF和PEG-3D-COF的合成
- 物理互动组件的构造.
- 光成像技术用于监测应变,摩擦和流动.
- 度依赖形态和光发光的特征.
- 分析度-变形等价性和结构演变动态.
主要成果:
- 证明了双3D-COF和PEG-3D-COF的成功合成.
- 在聚合物弹性体,有机和水性分散中实现应变分布的光成像.
- 观察到与施加的应变相关的敏感和可逆色变化
- 已确定与结构演变相关的度依赖形态和光发光.
结论:
- 开发的3D-COF和PEG-3D-COF对于动态光学测量应变和相关现象是有效的.
- 响应性归因于可控制的聚合结构和度-变形等效性.
- 这些发现为构建用于先进光学测量应用的响应性COF提供了一个有希望的平台.
相关概念视频
Total Internal Reflection Fluorescence Microscopy
Total internal reflection fluorescence microscopy or TIRF is an advanced microscopic technique used to visualize fluorophores in samples close to a solid surface with a higher refractive index, such as a glass coverslip. TIRF only allows fluorophores in proximity to the solid surface to be excited. When light from a medium with a lower refractive index (such as air) hits the glass coverslip at a critical angle, the light undergoes total internal reflection stead of passing through the glass.
Atomic Fluorescence Spectroscopy
Atomic fluorescence spectroscopy (AFS) is an analytical technique that involves the electronic transitions of atoms in a flame, furnace, or plasma being excited by electromagnetic (EM) radiation. When these atoms absorb energy, they become excited and subsequently release energy as they return to their original state. This emitted light, or "fluorescence," is observed at a right angle to the incident beam. Both absorption and emission processes transpire at distinct wavelengths, which are...


