A new visible light triggered Arrhenius photobase and its photo-induced reactions

Joonyoung F. Joung, Jeeun Lee, Joungin Hwang, Kihang Choi, Sungnam Park

Research output: Contribution to journalArticlepeer-review


Arrhenius photobases are of potential use for excited state hydroxide ion dissociation (ESHID), photo-induced pOH jump experiments, and base-catalyzed reactions. However, previously studied Arrhenius photobases have to be excited by UV light and undergo ESHID reactions only in protic solvents. These characteristics have become a disadvantage to their application in many fields of research. In this work, we have designed and synthesized a new Arrhenius photobase (NO2-Acr-OH), the ESHID reaction of which is readily triggered by visible light excitation. In contrast to previously studied Arrhenius photobases, NO2-Acr-OH undergoes ESHID reactions in protic solvents as well as in polar aprotic solvents. Solvent-dependent photo-induced reactions of NO2-Acr-OH are comprehensively studied by time-resolved fluorescence spectroscopy. Molecular designs for visible light triggered acridinol-based Arrhenius photobases with a large ΔpKb value are proposed.

Original languageEnglish
Pages (from-to)668-673
Number of pages6
JournalNew Journal of Chemistry
Issue number3
Publication statusPublished - 2020

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)
  • Materials Chemistry


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