Magnetoluminescence in a Photostable, Brightly Luminescent Organic Radical in a Rigid Environment

Shun Kimura, Tetsuro Kusamoto, Shojiro Kimura, Ken Kato, Yoshio Teki, Hiroshi Nishihara

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

We investigated the emission properties of a photostable luminescent organic radical, (3,5-dichloro-4-pyridyl)bis(2,4,6-trichlorophenyl)methyl radical (PyBTM), doped into host molecular crystals. The 0.05 wt %-doped crystals displayed luminescence attributed to a PyBTM monomer with a room-temperature emission quantum yield of 89 %, which is exceptionally high among organic radicals. The 10 wt %-doped crystals exhibited both PyBTM monomer and excimer-centered emission bands, and the intensity ratio of these two bands was modulated drastically by applying a magnetic field of up to 18 T at 4.2 K. This is the first observation of a magnetic field affecting the luminescence of organic radicals, and we also proposed a mechanism for this effect.

Original languageEnglish
Pages (from-to)12711-12715
Number of pages5
JournalAngewandte Chemie - International Edition
Volume57
Issue number39
DOIs
Publication statusPublished - 2018 Sep 24

Keywords

  • doping
  • excimer
  • luminescence
  • magnetic field effect
  • radicals

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)

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