基于光活性聚合诱导排放分子的金属有机框架,用于实现光刺激调节
Danfeng Ye1,2, Ruyi Zhang3, Bing Xu1
1College of Material Science and Chemical Engineering, Ningbo University of Technology, Ningbo, 315211, P. R. China.
Chemistry, an Asian journal
|January 3, 2025
概括
这项研究揭示了紫外线如何通过影响连接体聚合来改变基于胺的金属有机框架 (Ln-MOFs). 对晶体结构和发光的这种控制为先进材料提供了新的可能性.
科学领域:
- 材料科学 材料科学 材料科学
- 纳米技术纳米技术
- 发光的光度是非常的低.
背景情况:
- 兰化金属有机框架 (Ln-MOFs) 具有可调节的结构和发光.
- 连接体聚合诱导排放 (AIE) 特性和"天线效应"对Ln-MOF形态的影响仍然未得到充分研究.
研究的目的:
- 为了研究联体AIE特性与Ln-MOF发光和晶体结构上的"天线效应"之间的相互作用.
- 探索前体溶液的紫外线照射如何影响Ln-MOF特征.
主要方法:
- 使用溶热方法合成Tb-D-Cam-TPTB与TPTB (过硫化),D-Cam和Tb3+进行合成.
- 使用光谱和成像技术对TPTB,TPTB3+-TPTB协调,以及最终的MOF进行光物理研究.
- 在晶体生长之前对前体溶液进行紫外线照射.
主要成果:
- 一个已知的AIE分子TPTB在光刺激时表现出增强的发光,这是由于形状变化和聚合造成的.
- 前体溶液的紫外线辐射显著改变了得到的Tb-D-Cam-TPTB MOF的晶体结构,发光强度和发射颜色.
- 该研究确定了连接物AIE,"天线效应"和Ln-MOF的光物理性质之间的相关性.
结论:
- 连接体AIE特性和"天线效应"对Ln-MOF的发光和形态产生了重大影响.
- 前体溶液紫外线照射提供了一种调整 Ln-MOF 属性的方法.
- 这些发现显示出对防伪和传感技术的应用有前途.
更多相关视频
05:47Preparation of Polyoxometalate-based Photo-responsive Membranes for the Photo-activation of Manganese Oxide Catalysts
Published on: August 7, 2018
7.6K
11:20An Integrated System to Remotely Trigger Intracellular Signal Transduction by Upconversion Nanoparticle-mediated Kinase Photoactivation
Published on: August 30, 2017
7.4K
相关概念视频
01:12Cycloaddition Reactions: MO Requirements for Photochemical Activation
2.0K
Some cycloaddition reactions are activated by heat, while others are initiated by light. For example, a [2 + 2] cycloaddition between two ethylene molecules occurs only in the presence of light. It is photochemically allowed but thermally forbidden.
2.0K
01:26Photochemical Electrocyclic Reactions: Stereochemistry
1.8K
The absorption of UV–visible light by conjugated systems causes the promotion of an electron from the ground state to the excited state. Consequently, photochemical electrocyclic reactions proceed via the excited-state HOMO rather than the ground-state HOMO. Since the ground- and excited-state HOMOs have different symmetries, the stereochemical outcome of electrocyclic reactions depends on the mode of activation; i.e., thermal or photochemical.
Selection Rules: Photochemical Activation
Selection Rules: Photochemical Activation
1.8K
01:29The Photochemical Reaction Center
4.0K
Reaction centers are pigment-protein complexes that initiate energy conversion from photons to chemical entities. Therefore, photochemical reaction center is a more appropriate term that describes these complexes. The Nobel laureates Robert Emerson and William Arnold provided the first experimental evidence of photochemical reaction centers by demonstrating the participation of nearly 2,500 chlorophyll molecules for the release of just one molecule of oxygen. Despite thousands of photosynthetic...
4.0K