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Updated: Jun 9, 2025

Microfluidic-based Synthesis of Covalent Organic Frameworks COFs: A Tool for Continuous Production of COF Fibers and Direct Printing on a Surface
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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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蒸汽固体接口合成高度晶体的共价三酸框架,用于作为有效的光催化剂

Minghui Chen1, Ji Xiong1, Quan Shi1

  • 1School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300350, P. R. China.

Small (Weinheim an der Bergstrasse, Germany)
|October 25, 2024
PubMed
概括

一种新的蒸汽固体合成方法可以创建多样化,高度结晶的共价三酶框架 (CTF). 这些CTF显示出极好的光催化活性,用于水分裂,推进材料科学应用.

关键词:
同价三酸框架.摄影催化剂的使用合成方法 合成方法水的分裂是水的分裂.

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相关概念视频

Thermal and Photochemical Electrocyclic Reactions: Overview01:26

Thermal and Photochemical Electrocyclic Reactions: Overview

Electrocyclic reactions are reversible reactions. They involve an intramolecular cyclization or ring-opening of a conjugated polyene. Shown below are two examples of electrocyclic reactions. In the first reaction, the formation of the cyclic product is favored. In contrast, in the second reaction, ring-opening is favored due to the high ring strain associated with cyclobutene formation.
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Cycloaddition Reactions: MO Requirements for Photochemical Activation

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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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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