一种基于卟啉的共价有机框架作为无金属可见光发光二极管光催化剂用于一锅串联苄醇氧化/克诺文纳格尔缩合反应

A Porphyrin-Based Covalent Organic Framework as Metal-Free Visible-LED-Light Photocatalyst for One-Pot Tandem Benzyl Alcohol Oxidation/Knoevenagel Condensation.

作者信息

Oudi Sara, Oveisi Ali Reza, Daliran Saba, Khajeh Mostafa, Dhakshinamoorthy Amarajothi, García Hermenegildo

机构信息

Department of Chemistry, Faculty of Sciences, University of Zabol, Zabol P.O. Box 98615-538, Iran.

Departamento de Quimica, Universitat Politècnica de València, Av. De los Naranjos s/n, 46022 Valencia, Spain.

出版信息

Nanomaterials (Basel). 2023 Jan 30;13(3):558. doi: 10.3390/nano13030558.

A porphyrin-based covalent organic framework (COF), namely Porph-UOZ-COF (UOZ stands for the University of Zabol), has been designed and prepared via the condensation reaction of 5,10,15,20-tetrakis-(3,4-dihydroxyphenyl)porphyrin (DHPP) with 1,4-benzenediboronic acid (DBBA), under the solvothermal condition. The solid was characterized by spectroscopic, microscopic, and powder X-ray diffraction techniques. The resultant multifunctional COF revealed an outstanding performance in catalyzing a one-pot tandem selective benzylic C-H photooxygenation/Knoevenagel condensation reaction in the absence of additives or metals under visible-LED-light irradiation. Notably, the catalytic activity of the COF was superior to individual organic counterparts and the COF was both stable and reusable for four consecutive runs. The present approach illustrates the potential of COFs as promising metal-free (photo) catalysts for the development of tandem reactions.

一种基于卟啉的共价有机框架（COF），即卟啉 - 扎博勒大学COF（UOZ代表扎博勒大学），通过5,10,15,20 - 四（3,4 - 二羟基苯基）卟啉（DHPP）与1,4 - 苯二硼酸（DBBA）在溶剂热条件下的缩合反应设计并制备而成。该固体通过光谱、显微镜和粉末X射线衍射技术进行表征。所得的多功能COF在可见光发光二极管照射下，在无添加剂或金属的情况下催化一锅串联选择性苄基C - H光氧化/克诺文格尔缩合反应时表现出优异的性能。值得注意的是，该COF的催化活性优于单个有机对应物，并且该COF连续四次运行均稳定且可重复使用。本方法说明了COF作为用于串联反应开发的有前景的无金属（光）催化剂的潜力。