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Updated: Jan 7, 2026

A Technical Guide for Performing Spectroscopic Measurements on Metal-Organic Frameworks
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A Technical Guide for Performing Spectroscopic Measurements on Metal-Organic Frameworks

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在共价有机框架中对电子效应进行系统调节,以促进光催化

He Gu1, Pei Chen1, Yinghui Xie1

  • 1College of Environmental Science and Engineering, North China Electric Power University, Beijing 102206, P.R. China.

ACS central science
|December 31, 2025
PubMed
概括

这项研究揭示了诱导和结合效应对共价有机框架 (COF) 光催化剂效率至关重要. 平衡这些效应优化了性能,从而提高了的提取效率.

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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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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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