Carbazole-Dendronized Luminescent Radicals

Rui Xiaotian; Wataru Ota; Tohru Sato; Minori Furukori; Yasuo Nakayama; Takuya Hosokai; Eri Hisamura; Kazuhiro Nakamura; Kenshiro Matsuda; Kohei Nakao; Andrew P. Monkman; Ken Albrecht

doi:10.1002/anie.202302550

Carbazole-Dendronized Luminescent Radicals

Rui Xiaotian, Wataru Ota, Tohru Sato, Minori Furukori, Yasuo Nakayama, Takuya Hosokai, Eri Hisamura, Kazuhiro Nakamura, Kenshiro Matsuda, Kohei Nakao, Andrew P. Monkman, Ken Albrecht

Department of Pure and Applied Chemistry

Research output: Contribution to journal › Article › peer-review

31 Citations (Scopus)

Abstract

A series of carbazole-dendronized tris(2,4,6-trichlorophenyl)methyl (TTM) radicals have been synthesized. The photophysical properties of dendronized radicals up to the fourth generation were compared systematically to understand how structure–property relationships evolve with generation. The photoluminescence quantum yield (PLQY) was found to increase with the increasing generation, and the fourth generation (G4TTM) in cyclohexane solution showed a PLQY as high as 63 % at a wavelength of 627 nm (in the deep-red region) from the doublet state. The dendron modification strategy also showed a blue-shift of the emission on increasing the generation number, and the photostability was also increased compared to the bare TTM radical.

Original language	English
Article number	e202302550
Journal	Angewandte Chemie - International Edition
Volume	62
Issue number	28
DOIs	https://doi.org/10.1002/anie.202302550
Publication status	Published - 10 Jul 2023

Keywords

Carbazoles
Dendrimers
Excited Doublet State
Luminescencent Materials
Stable Radicals

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10.1002/anie.202302550

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title = "Carbazole-Dendronized Luminescent Radicals",

abstract = "A series of carbazole-dendronized tris(2,4,6-trichlorophenyl)methyl (TTM) radicals have been synthesized. The photophysical properties of dendronized radicals up to the fourth generation were compared systematically to understand how structure–property relationships evolve with generation. The photoluminescence quantum yield (PLQY) was found to increase with the increasing generation, and the fourth generation (G4TTM) in cyclohexane solution showed a PLQY as high as 63 \% at a wavelength of 627 nm (in the deep-red region) from the doublet state. The dendron modification strategy also showed a blue-shift of the emission on increasing the generation number, and the photostability was also increased compared to the bare TTM radical.",

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author = "Rui Xiaotian and Wataru Ota and Tohru Sato and Minori Furukori and Yasuo Nakayama and Takuya Hosokai and Eri Hisamura and Kazuhiro Nakamura and Kenshiro Matsuda and Kohei Nakao and Monkman, \{Andrew P.\} and Ken Albrecht",

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doi = "10.1002/anie.202302550",

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T1 - Carbazole-Dendronized Luminescent Radicals

AU - Xiaotian, Rui

AU - Ota, Wataru

AU - Sato, Tohru

AU - Furukori, Minori

AU - Nakayama, Yasuo

AU - Hosokai, Takuya

AU - Hisamura, Eri

AU - Nakamura, Kazuhiro

AU - Matsuda, Kenshiro

AU - Nakao, Kohei

AU - Monkman, Andrew P.

AU - Albrecht, Ken

PY - 2023/7/10

Y1 - 2023/7/10

N2 - A series of carbazole-dendronized tris(2,4,6-trichlorophenyl)methyl (TTM) radicals have been synthesized. The photophysical properties of dendronized radicals up to the fourth generation were compared systematically to understand how structure–property relationships evolve with generation. The photoluminescence quantum yield (PLQY) was found to increase with the increasing generation, and the fourth generation (G4TTM) in cyclohexane solution showed a PLQY as high as 63 % at a wavelength of 627 nm (in the deep-red region) from the doublet state. The dendron modification strategy also showed a blue-shift of the emission on increasing the generation number, and the photostability was also increased compared to the bare TTM radical.

AB - A series of carbazole-dendronized tris(2,4,6-trichlorophenyl)methyl (TTM) radicals have been synthesized. The photophysical properties of dendronized radicals up to the fourth generation were compared systematically to understand how structure–property relationships evolve with generation. The photoluminescence quantum yield (PLQY) was found to increase with the increasing generation, and the fourth generation (G4TTM) in cyclohexane solution showed a PLQY as high as 63 % at a wavelength of 627 nm (in the deep-red region) from the doublet state. The dendron modification strategy also showed a blue-shift of the emission on increasing the generation number, and the photostability was also increased compared to the bare TTM radical.

KW - Carbazoles

KW - Dendrimers

KW - Excited Doublet State

KW - Luminescencent Materials

KW - Stable Radicals

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U2 - 10.1002/anie.202302550

DO - 10.1002/anie.202302550

M3 - Article

C2 - 36951925

AN - SCOPUS:85152935790

SN - 1433-7851

VL - 62

JO - Angewandte Chemie - International Edition

JF - Angewandte Chemie - International Edition

IS - 28

M1 - e202302550

ER -

Carbazole-Dendronized Luminescent Radicals

Abstract

Keywords

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