Fine Tuning the Redox Potentials of Carbazolic Porous Organic Frameworks for Visible-Light Photoredox Catalytic Degradation of Lignin β-O-4 Models

Jian Luo, Xiang Zhang, Jingzhi Lu, Jian Zhang

Research output: Contribution to journalArticle

56 Scopus citations

Abstract

We report a facile approach to fine tune the redox potentials of π-conjugated porous organic frameworks (POFs) by copolymerizing carbazolic electron donor (D) and electron acceptor (A) based comonomers at different ratios. The resulting carbazolic copolymers (CzCPs) exhibit a wide range of redox potentials that are comparable to common transition-metal complexes and are used in the stepwise photocatalytic degradation of lignin β-O-4 models. With the strongest oxidative capability, CzCP100 (D:A = 0:100) exhibits the highest efficiency for the oxidation of benzylic β-O-4 alcohols, while the highly reductive CzCP33 (D:A = 66:33) gives the highest yield for the reductive cleavage of β-O-4 ketones. CzCPs also exhibit excellent stability and recyclability and represent a class of promising heterogeneous photocatalysts for the production of fine chemicals from sustainable lignocellulosic biomass.

Original languageEnglish (US)
Pages (from-to)5062-5070
Number of pages9
JournalACS Catalysis
Volume7
Issue number8
DOIs
StatePublished - Aug 4 2017

Keywords

  • carbazole
  • heterogeneous catalysis
  • lignin degradation
  • porous organic frameworks
  • visible photocatalysis

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)

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