Related Experiment Video
Updated: Jan 8, 2026

Synthesis of 1,2-Azaborines and the Preparation of Their Protein Complexes with T4 Lysozyme Mutants
Published on: March 25, 2017
Bis-Boron/Nitrogen-Doped Azaullazines: Synthesis, Structures, and Their Emitting Properties
Hui Qi1, Jiahao Cui2, Yiqing Liu1
1Tianjin Key Laboratory of Organic Solar Cells and Photochemical Conversion, School of Chemistry and Chemical Engineering, Tianjin University of Technology, Tianjin 300384, People's Republic of China.
None:
We herein report a concise three-step sequence to construct three BN-doped azaullazines (BNAzaU-1, BNAzaU-2, and BNAzaU-3) with bee-shaped structural features. The synthesis includes (ii) Clauson-Kaas pyrrole cyclization, (ii) Buchwald-Hartwig C-N coupling, and (iii) electrophilic borylation reactions. Single-crystal X-ray diffraction analysis unambiguously confirms the highly planarized, rigid π-conjugated framework of the core of BN-doped azaullazine. All three BN-doped azaullazines demonstrate characteristic dual emission originating from both localized excited state (short wavelength) and charge-transfer state (long wavelength). In specific, BNAzaU-1 exhibits superior photoluminescent properties with a high quantum yield. We fabricated three solution-processed OLEDs by employing BNAzaU-1, BNAzaU-2, and BNAzaU-3 as emissive layers. All OLEDs show broadband emission spectra, and the BNAzaU-1-based OLED achieves premium electroluminescent performance with a maximum luminance of 2218 cd m-2 and an external quantum efficiency of 1.31%, which shows significant potential in solid-state lighting.
More Related Videos
11:45Preparation of Stable Bicyclic Aziridinium Ions and Their Ring-Opening for the Synthesis of Azaheterocycles
Published on: August 22, 2018
08:51Scale-up Chemical Synthesis of Thermally-activated Delayed Fluorescence Emitters Based on the Dibenzothiophene-S,S-Dioxide Core
Published on: October 24, 2017
Related Concept Videos
Aryldiazonium Salts to Azo Dyes: Diazo Coupling
Nomenclature of Aryl and Heterocyclic Amines
Diazonium Group Substitution with Halogens and Cyanide: Sandmeyer and Schiemann Reactions
1° Amines to Diazonium or Aryldiazonium Salts: Diazotization with NaNO2 Mechanism
Diazonium Group Substitution: –OH and –H
1° Amines to Diazonium or Aryldiazonium Salts: Diazotization with NaNO2 Overview
The nitrous acid is unstable. Hence, it is formed in situ from a solution of sodium nitrite and cold aqueous acids such as hydrochloric or sulfuric acid. In an acidic solution, the –OH group of nitrous acid undergoes protonation to give oxonium ion, followed by...