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

Kimura Shun | Zendy; Kusamoto Tetsuro | Zendy; Kimura Shojiro | Zendy; Kato Ken | Zendy; Teki Yoshio | Zendy; Nishihara Hiroshi | Zendy

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

Author(s) -

Kimura Shun,

Kusamoto Tetsuro,

Kimura Shojiro,

Kato Ken,

Teki Yoshio,

Nishihara Hiroshi

Publication year - 2018

Publication title -

angewandte chemie international edition

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 5.831

H-Index - 550

eISSN - 1521-3773

pISSN - 1433-7851

DOI - 10.1002/anie.201805466

Subject(s) - luminescence , radical , photochemistry , monomer , quantum yield , excimer , doping , materials science , chemistry , polymer , fluorescence , optoelectronics , organic chemistry , optics , physics

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.

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