Two tris(2,4,6-trichlorophenyl)methyl (TTM)-type luminescent radicals, TTM-(3PCz)2 and TTM-(3PCz)3, bearing 2 and 3 9-phenylcarbazol-3-yl (3PCz) substituents, respectively, were synthesized and characterized. The photobleaching of these radicals was suppressed compared with that of previously reported TTM-type luminescent radicals, suggesting a favorable effect of the multiple electron-donating 3PCz groups on the photostability of the TTM-type radicals.
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Yang et al. (2024) studied this question.
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