title: One-Step Borylation of 1,3-Diaryloxybenzenes Towards Efficient Materials for Organic Light-Emitting Diodes.
abstract: 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.
authors.affiliation: Department of Chemistry, School of Science and Technology, Kwansei Gakuin University, 2-1 Gakuen, Sanda, Hyogo 669-1337 (Japan).
authors.forename: Hiroki
authors.initials: H
authors.lastname: Hirai
authors.affiliation: Department of Chemistry, School of Science and Technology, Kwansei Gakuin University, 2-1 Gakuen, Sanda, Hyogo 669-1337 (Japan).
authors.forename: Kiichi
authors.initials: K
authors.lastname: Nakajima
authors.affiliation: Department of Chemistry, School of Science and Technology, Kwansei Gakuin University, 2-1 Gakuen, Sanda, Hyogo 669-1337 (Japan).
authors.forename: Soichiro
authors.initials: S
authors.lastname: Nakatsuka
authors.affiliation: JNC Petrochemical Corporation, 5-1 Goi Kaigan, Ichihara, Chiba 290-8551 (Japan).
authors.forename: Kazushi
authors.initials: K
authors.lastname: Shiren
authors.affiliation: JNC Petrochemical Corporation, 5-1 Goi Kaigan, Ichihara, Chiba 290-8551 (Japan).
authors.forename: Jingping
authors.initials: J
authors.lastname: Ni
authors.affiliation: JNC Petrochemical Corporation, 5-1 Goi Kaigan, Ichihara, Chiba 290-8551 (Japan).
authors.forename: Shintaro
authors.initials: S
authors.lastname: Nomura
authors.affiliation: JNC Petrochemical Corporation, 5-1 Goi Kaigan, Ichihara, Chiba 290-8551 (Japan).
authors.forename: Toshiaki
authors.initials: T
authors.lastname: Ikuta
authors.affiliation: Department of Chemistry, School of Science and Technology, Kwansei Gakuin University, 2-1 Gakuen, Sanda, Hyogo 669-1337 (Japan). hatake@kwansei.ac.jp.|PRESTO (Japan) Science and Technology Agency, 5, Sanbancho, Chiyoda, Tokyo 102-0075 (Japan). hatake@kwansei.ac.jp.|ESICB, Kyoto University, Katsura, Kyoto 615-8520 (Japan). hatake@kwansei.ac.jp.
authors.forename: Takuji
authors.initials: T
authors.lastname: Hatakeyama
keywords: aromaticity; borylation; helicene; light-emitting diodes; phosphorescence