Premium
Stable Boron‐Containing Blue‐Photoluminescent Radicals
Author(s) -
Feng Zhongtao,
Chong Yuanyuan,
Tang Shuxuan,
Ruan Huapeng,
Fang Yong,
Zhao Yue,
Jiang Jun,
Wang Xinping
Publication year - 2021
Publication title -
chinese journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.28
H-Index - 41
eISSN - 1614-7065
pISSN - 1001-604X
DOI - 10.1002/cjoc.202100188
Subject(s) - radical , chemistry , photoluminescence , electron paramagnetic resonance , luminescence , boron , photochemistry , excited state , spectroscopy , optoelectronics , nuclear magnetic resonance , atomic physics , organic chemistry , physics , quantum mechanics
Main observation and conclusion 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 synthetic route. They were characterized 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 (D 2 /D 3 ) to the ground state (D 0 ) 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.