Covalent organic framework as an efficient, metal-free, heterogeneous photocatalyst for organic transformations under visible light

Modulating Benzothiadiazole‐Based Covalent Organic Frameworks via Halogenation for Enhanced Photocatalytic Water Splitting

“…The chemical structures of Py‐ X TP‐BT‐COF were further confirmed by the 13 C solid‐state CP/MAS NMR spectroscopy (Supporting Information, Figure S5). The peak around 152 ppm can be assigned to the carbon atom of the imine (C=N) linkages while the peaks between 100 and 150 ppm can be attributed to the sp 2 ‐bonded carbon in the backbone . Moreover, the elemental analysis of Py‐ X TP‐BT‐COFs indicate that the contents of C, H, N and S were close to the theoretical values based on an infinite 2D sheet (Supporting Information, Table S1).…”

Sunlight‐Driven Synthesis of 1,2,4‐Thiadiazoles via Oxidative Construction of a Nitrogen‐Sulfur Bond Catalyzed by a Reusable Covalent Organic Framework

“…However, to‐date few reports have described the photocatalytic synthetic application of COFs . In recent years, photoactive two‐dimensional (2D) COFs with charge‐separation capabilities have been explored as efficient visible‐light‐active photocatalysts, especially in C−C and C‐heteroatom bond formation, as well certain important oxidation and reduction reactions . Therefore, it is imperative to further explore the novel application of 2D‐COFs in the photocatalytic construction of other important chemical bonds.…”

Covalent Organic Frameworks: A Sustainable Photocatalyst toward Visible‐Light‐Accelerated C3 Arylation and Alkylation of Quinoxalin‐2(1H)‐ones

“…In addition, unlike some inorganic photoactive semiconductors, photoactive COFs are constructed solely of periodic organic molecular building blocks, offering a remarkable tunability of various photocatalytic properties such as light absorption area, charge separation ability, redox potential and pore size . Recently, pioneering studies on the application of photoactive COFs as heterogeneous photocatalysts in visible‐light‐driven organic transformations have been reported, including visible‐light‐driven CDC reactions, oxidation, reductive dehalogenation, and E – Z isomerization . These works have demonstrated the decent photocatalytic efficiencies and promising application of COFs in visible‐light‐driven organic transformations.…”