Pt(II)-Decorated Covalent Organic Framework for Photocatalytic Difluoroalkylation and Oxidative Cyclization Reactions

Abstract

A new covalent organic framework (COF) based on imine bonds was assembled from 2-(4-formylphenyl)-5-formylpyridine and 1,3,6,8-tetrakis(4-aminophenyl)pyrene, which showed an interesting dual-pore structure with high crystallinity. Postmetallation of the COF with Pt occurred selectively at the N donor (imine and pyridyl) in the larger pores. The metallated COF served as an excellent recyclable heterogeneous photocatalyst for decarboxylative difluoroalkylation and oxidative cyclization reactions.

Photocatalytic conversion of arylboronic acids to phenols by a new 2D donor–acceptor covalent organic framework

“…[25][26][27][28][29][30][31][32] Recently, reactions like redox, CH functionalization and E/Z isomerization have proved that covalent organic frameworks have great appeal in visible light-driven organic transformations. [33][34][35][36][37] They provide a simple and environmentally friendly method for the synthesis of important chemicals. At present, a variety of COFs catalysts have been developed by researchers and are still being explored.…”

A cobalt covalent organic framework: a dual-functional atomic-level catalyst for visible-light-driven C–H annulation of amides with alkynes

“…Accordingly, to achieve ideal metallaphotoredox catalytic activities, [2,2′-bipyridine]-5,5′-dicarbaldehyde, possessing two suitable metal coordination sites and long π conjugated 4,4′,4′′,4′′′-(1,9-dihydropyrene-1,3,6,8-tetrayl)tetraaniline were chosen to assemble the organic backbone of the MCOF. Although similar frameworks 20 have previously been reported, and several pioneering studies on utilizing them to coordinate transition metals for classical cross couplings 21 have been developed, the introduction of cobalt onto it towards uncovering new photo reactivities for visible-light-driven C–H annulation is still the first attempt.…”

Porous organic polymers for light-driven organic transformations

“…49d). 203 The abundant N-sites (imine and pyridyl) in the COF-UARK-49 backbone of the double-porous structure provided the possibility for selective loading of Pt. Despite the differences in design strategies, material types, and catalytic effects, these two different materials have similar catalytic mechanisms (Fig.…”