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Updated: Jul 9, 2025

Determination of the Photoisomerization Quantum Yield of a Hydrazone Photoswitch
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Published on: February 7, 2022

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阿佐烯作为一个可光切换的机械

Yiran Li1,2, Bin Xue1, Jiahui Yang1

  • 1Collaborative Innovation Center of Advanced Microstructures, National Laboratory of Solid-State Microstructure, Key Laboratory of Intelligent Optical Sensing and Manipulation, Ministry of Education, Department of Physics, Nanjing University, Nanjing, China.

Nature chemistry
|December 5, 2023
PubMed
概括

光能改变酸的破裂力,使得光能调节的聚合物网络成为可能. 这项研究揭示了光诱导的阿佐 (一种光响应分子) 变化如何影响其机械性质和骨折行为.

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Aryldiazonium Salts to Azo Dyes: Diazo Coupling01:11

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The reaction of weakly electrophilic aryldiazonium (also called arenediazonium) salts with highly activated aromatic compounds leads to the formation of products with an —N=N— link, called an azo linkage. This reaction, presented in Figure 1, is known as diazo coupling and occurs without the loss of the nitrogen atoms of the aryldiazonium salt. Highly activated aromatic compounds such as phenols or arylamines favor the diazo coupling reaction. The coupling generally occurs at the...
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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.
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