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Stable Boron-Containing Blue-Photoluminescent Radicals

preprint
submitted on 20.03.2021, 10:10 and posted on 23.03.2021, 11:10 by Zhongtao Feng, Yuanyuan Chong, Shuxuan Tang, Huapeng Ruan, Yong Fang, Yue Zhao, Jun Jiang, Xinping Wang
It is highly urgent to develop synthetic strategies to make new category of stable luminescent radicals with desired emission wavelength. In this study, we have isolated two dioxoborocyclic radicals ( 3 and 4 ) by a direct sy nthetic rou te. They were charac terized by UV, EPR spectroscopy and SQUID measurements. Their structures were obtained by single crystal X ray diffraction. Both radicals produce blue photoluminescence (458 nm for 3 and 478 nm for 4 ) by radiative decay from higher excited states (D2/D3) to the ground state (D0) based on theoretical calculation, breaking Kasha rule. The work records a new kind of radical emitters and the first stable radicals with blue emission bands.

Funding

2016YFA0300404

2018YFA0306004

Elemental free radical chemistry

National Natural Science Foundation of China

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New metal complexes and their reactivity

National Natural Science Foundation of China

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22033007

History

Email Address of Submitting Author

18825077505@163.com

Institution

Nanjing University

Country

China

ORCID For Submitting Author

orcid.org/0000-0002-0231-6952

Declaration of Conflict of Interest

non conflict of interest

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