D˙–A radicals 2a–2c were developed by combining polychlorinated trityl as a donor with pyridinium as an acceptor. The electron-deficient nature of the pyridinium unit significantly lowers the LUMO energy, thereby enabling SOMO–LUMO (α-type) electronic transitions, in contrast to conventional luminescent radicals that predominantly exhibit HOMO–SUMO (β-type) transitions.
J. Li, Z. Zhang, Z. Li, J. Wang, C. Xu, J. Xiong, L. Yue and B. Rao, Chem. Commun., 2026, Advance Article , DOI: 10.1039/D6CC00928J
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