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Updated: Apr 3, 2026

Exploring the Radical Nature of a Carbon Surface by Electron Paramagnetic Resonance and a Calibrated Gas Flow
Published on: April 24, 2014
Spin-Correlated Luminescence of Mechanically Generated Radical Species
Shun Yoshida1, Ryota Matsuoka1, Shojiro Kimura2
1Division of Frontier Materials Science, Department of Materials Engineering Science, Graduate School of Engineering Science, The University of Osaka, Toyonaka, Japan.
Abstract:
A tetraarylsuccinonitrile (TASN) derivative (12) substituted with bulky triarylmethane groups dissociated into luminescent cyanodiarylmethyl radical 1 upon thermal or mechanical stimulation. The average dissociation yield after mechanochemical treatment was 2.6%, among the highest reported for small-molecule TASN compounds. Ground 12 showed a magnetic field effect on luminescence, the first such observation from a radical emitter other than triarylmethyl radicals. This study demonstrates the universality of spin-correlated luminescence among luminescent radicals.
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