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Updated: May 5, 2026

Synthesis and Characterization of Functionalized Metal-organic Frameworks
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Synthesis and Characterization of Functionalized Metal-organic Frameworks

Published on: September 5, 2014

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イミン結合コヴァレント有機フレームワークの化学リサイクル

Yimiao Jing1, Jie Wang1, Yu Fang1

  • 1MOE Key Laboratory of Applied Surface and Colloid Chemistry, School of Chemistry and Chemical Engineering, Shaanxi Normal University Xi'an 710119 China zhongshan.liu@snnu.edu.cn.

Chemical science
|February 20, 2026
PubMed
まとめ

研究者らは,イミン結合コヴァレント有機フレームワーク (COF) のクローズドループリサイクルを開発した. この方法は化学的にCOFを脱ポリマー化し再構築し,これらの多孔性の材料の持続可能な再利用を可能にします.

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Aldehydes and Ketones with Amines: Imine and Enamine Formation Overview01:16

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Primary amines react with carbonyl compounds—aldehydes and ketones—to generate imines. Imines consist of a C=N double bond and are named Schiff bases after its discoverer—the German chemist Hugo Schiff. On the other hand, secondary amines react with carbonyl compounds to give enamines. In enamines, the presence of a C=C double bond adjacent to the nitrogen atom leads to the delocalization of the lone pair.
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Carbonyl compounds and primary amines undergo reductive amination first to produce imines, followed by secondary amines in the same reaction mixture, using selective reducing agents like sodium cyanoborohydride or sodium triacetoxyborohydride. Reductive amination produces different degrees of substitution of amines depending on the starting amine substrate.
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Imine formation involves the addition of carbonyl compounds to a primary amine. It begins with the generation of carbinolamine through a series of steps involving an initial nucleophilic attack and then several proton transfer reactions. The second part includes the elimination of water, as a leaving group, to give the imine.
Imines are formed under mildly acidic conditions. A pH of 4.5 is ideal for the reaction.
If the pH is low or the solution is too acidic, the reaction slows down in the...
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