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Updated: Jun 7, 2025

Microfluidic-based Synthesis of Covalent Organic Frameworks COFs: A Tool for Continuous Production of COF Fibers and Direct Printing on a Surface
08:42

Microfluidic-based Synthesis of Covalent Organic Frameworks COFs: A Tool for Continuous Production of COF Fibers and Direct Printing on a Surface

Published on: July 10, 2017

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半孔基共价有机框架,用于长寿命的电荷分离刺激介导的光催化 [4+2] 取消

Ipsita Nath1, Jeet Chakraborty1, Kuber Singh Rawat2

  • 1Center for Ordered Materials, Organometallics and Catalysis (COMOC), Department of Chemistry, Ghent University, Krijgslaan 281-S3, Ghent, 9000, Belgium.

Advanced materials (Deerfield Beach, Fla.)
|November 18, 2024
PubMed
概括

这项研究引入了一种具有工程陷状态的新型共价有机框架 (COF) 光催化剂. 这种设计稳定了电荷分离的激子,显著增强了有机合成的光催化活性.

关键词:
亚克里迪是什么意思?充电分离器的使用方法协价有机框架 协价有机框架激发激发激发激发激发光催化作用的光催化作用

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Author Spotlight: Magnetometric Characterization of Intermediates in the Solid-State Electrochemistry of Redox-Active Metal-Organic Frameworks06:53

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Photochemical Electrocyclic Reactions: Stereochemistry

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
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Thermal and Photochemical Electrocyclic Reactions: Overview

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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.
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