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One‐Step Borylation of 1,3‐Diaryloxybenzenes Towards Efficient Materials for Organic Light‐Emitting Diodes
Author(s) -
Hirai Hiroki,
Nakajima Kiichi,
Nakatsuka Soichiro,
Shiren Kazushi,
Ni Jingping,
Nomura Shintaro,
Ikuta Toshiaki,
Hatakeyama Takuji
Publication year - 2015
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201506335
Subject(s) - borylation , boron , phosphorescence , oled , photochemistry , common emitter , diode , fluorescence , bodipy , materials science , chemistry , helicene , optoelectronics , nanotechnology , organic chemistry , molecule , aryl , alkyl , physics , layer (electronics) , quantum mechanics
The development of a one‐step borylation of 1,3‐diaryloxybenzenes, yielding novel boron‐containing polycyclic aromatic compounds, is reported. The resulting boron‐containing compounds possess high singlet‐triplet excitation energies as a result of localized frontier molecular orbitals induced by boron and oxygen. Using these compounds as a host material, we successfully prepared phosphorescent organic light‐emitting diodes exhibiting high efficiency and adequate lifetimes. Moreover, using the present one‐step borylation, we succeeded in the synthesis of an efficient, thermally activated delayed fluorescence emitter and boron‐fused benzo[6]helicene.