1259883-01-6

Upstream product

• 1072960-66-7 4-formylphenylboronic acid 
• 36809-26-4 4-N,N-diphenylamino-1-bromobenzene 
• 87199-17-5 4-formylphenylboronic acid, 
• 1146340-38-6 1-phenyl-2-[4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-phenyl]-1H-benzo[d]imidazole 
• 359427-13-7 4-bromo-N-(2-(phenylamino)phenyl)benzamide 
• 2620-76-0 2-(4-bromophenyl)-1-phenyl-1H-benzimidazole 
• 201802-67-7 4-(diphenylamino)phenyl boronic acid 
• 534-85-0 N-phenyl-1,2-benzenediamine 
• 586-75-4 4-chlorobenzoyl chloride 

Relevant academic research and scientific papers

Enhanced efficiency in nondoped, blue organic light-emitting diodes utilizing simultaneously local excition and two charge-transfer exciton from benzimidazole-based donor-acceptor molecules

The simultaneous utilization of all charge-transfer excitons and local excitons is the pathway to obtain the high efficiency fluorescent organic light-emitting diodes (FOLEDs). Here, a twisted intramolecular charge transfer state (TICT-state), a planar intramolecular charge transfer state (ICT-state), and a locally excited state (LE-state) are demonstrated to enhance the occurrence of singlet excitons in the fluorescent emitters, which are based on benzimidazole and triphenylamine donor-acceptor derivatives. The synthesis, photophysics and electroluminescent (EL) performance are studied systematically. The fluorescence emitters (TPABBBI and TPABBI) with the special TICT and ICT characteristics realize the electron-hole (e-h) recombination via intramolecular conversion from charge-transfer excitons to radiative singlet exciton. The devices based on them show high efficiency (5.1 cd/A, 5.77 lm/W, 5.66% of EQEm for TPABBBI and 3.56 cd/A, 3.11 lm/W, 4.23% for TPABBI), low efficiency roll-off at high luminance and stable blue emission.

Synthesis of Benzimidazole-Substituted Arylboronic Acids via Aerobic Oxidation of 1,2-Arylenediamines and Formyl-Substituted Aryl MIDA Boronates using Potassium Iodide as a Catalyst

A highly efficient protocol for the synthesis of benzimidazole-substituted arylboronic acids was developed via aerobic oxidative cyclization of 1,2-aryldiamines and formyl-substituted aryl MIDA (N-methyliminodiacetic acid) boronates using potassium iodide as a nucleophilic catalyst. Furthermore, a one-pot protocol for the synthesis of benzimidazole-substituted arylboronic acids from 1,2-phenylenediamines and formyl-substituted arylboronic acids was developed without the isolation of any intermediates. The resulting boronic acids were further subjected to Suzuki-Miyaura coupling reactions without isolation, leading to diaryl-substituted benzimidazoles with only one separation step.

Efficient deep-blue emitters based on triphenylamine-linked benzimidazole derivatives for nondoped fluorescent organic light-emitting diodes

Two triphenylamine-substituted benzimidazole derivatives were synthesized for use as efficient deep-blue emitters in nondoped fluorescent organic light-emitting diodes (FLOLEDs). The molecular design of 40,40 0-(1H-benzo[d]imidazole-1,2-diyl)bis(N,N-diphenylbiphenyl-4-amine) (T2B) to limit the molecular packing density enabled T2B-based devices to suppress the exciton quenching by a bulky three-dimensional structure. Nondoped FLOLEDs fabricated using T2B as a blue emitter exhibited an external quantum efficiency of 4.67% with color coordinates of (0.15, 0.08).

EMISSIVE ARYL-HETEROARYL COMPOUNDS

Disclosed herein are compounds represented by Formula 1, wherein R1, Ar1, X, Ar2, Ar3, and Het are described herein. Compositions and light-emitting devices related thereto are also disclosed.