Vinylene-bridged donor–acceptor type porous organic polymers for enhanced photocatalysis of amine oxidative coupling reactions under visible light. Issue 53 (14th October 2021)

• Record Type: Journal Article
• Authors: Wu, Bang; Jiang, Xinyue; Liu, Yang; Li, Qiu-Yan; Zhao, Xinsheng; Wang, Xiao-Jun
• Is Part Of: RSC advances. Volume 11:Issue 53(2021)
• Page Start: 33653
• Page End: 33660
• Publication Date: 2021-10-14
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1039/d1ra06118f
• Languages: English
• ISSNs: 2046-2069

Abstract

Abstract : Two vinylene-bridged D–A structural POPs are constructed by the electron-rich triarylamine and electron-deficient tricyanomesitylene, which exhibited highly effective photocatalytic activities for aerobic oxidative coupling of amines to imine. Abstract : Porous organic polymers (POPs), owing to their abundant porosity, high stability and well-tunable properties, are promising candidates as heterogeneous photocatalysts for organic transformations. Here we report two vinylene-bridged donor–acceptor (D–A) structural POPs (TpTc-POP and TbTc-POP) that are facilely constructed by the electron-rich triarylamine and electron-deficient tricyanomesitylene as key building blocks by the organic base catalyzed Knoevenagel condensation. Both TpTc-POP and TbTc-POP possess hierarchical meso- and micro-pores with a high surface area. Furthermore, the unsubstituted vinylene linkages of D–A moieties in their polymer backbones extend their π-conjugation and render their broad absorption range in the visible-light region. Thus, these DA-POPs exhibited highly effective photocatalytic activities for aerobic oxidative coupling of amines to imines under visible light irradiation. This study shows the great potential of conjugated POPs with a D–A structural feature in designing highly efficient and active heterogeneous photocatalytic systems.