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Isolating Free Carbenes, their Mixed Dimers and Organic Radicals
Published on: April 19, 2019
Effects of halogen atom substitution on luminescent radicals: a case study on tris(2,4,6-trichlorophenyl)methyl
Kazuhiro Nakamura1, Kenshiro Matsuda1, Rui Xiaotian1
1Department of Applied Science for Electronics and Materials, Interdisciplinery Graduate School of Engineering Sciences, Kyushu University, Fukuoka 816-8580, Japan.
Abstract:
A series of halogen-substitute carbazole TTM radicals was synthesized. The effect of halogen substituents on radical luminescence was systematically evaluated. It was found that the well-known heavy atom effect does not work in the emission of radicals and that halogen substitution of the donor carbazole can change the HOMO and alter the absorption and emission wavelengths. In addition, the photostability was found to be improved with respect to TTM but not significantly different from that of closed-shell fluorescent molecules.
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