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Related Concept Videos

Aryldiazonium Salts to Azo Dyes: Diazo Coupling01:11

Aryldiazonium Salts to Azo Dyes: Diazo Coupling

3.6K
The reaction of weakly electrophilic aryldiazonium (also called arenediazonium) salts with highly activated aromatic compounds leads to the formation of products with an —N=N— link, called an azo linkage. This reaction, presented in Figure 1, is known as diazo coupling and occurs without the loss of the nitrogen atoms of the aryldiazonium salt. Highly activated aromatic compounds such as phenols or arylamines favor the diazo coupling reaction. The coupling generally occurs at the para...
3.6K
Nomenclature of Aryl and Heterocyclic Amines01:10

Nomenclature of Aryl and Heterocyclic Amines

3.0K
The simplest aromatic amine is phenylamine, which contains an –NH2 functionality directly attached to an aromatic ring. The name aniline is designated for this skeleton. As shown in Figure 1, the common names of the functionalized anilines involve prefixes ortho-, meta-, and para- to indicate the substitution position. Different functionalized aniline derivatives also have notable trivial names.
3.0K
Diazonium Group Substitution with Halogens and Cyanide: Sandmeyer and Schiemann Reactions01:20

Diazonium Group Substitution with Halogens and Cyanide: Sandmeyer and Schiemann Reactions

2.4K
Arenediazonium substitution reactions occur when the diazonium group is substituted by various functional groups such as halides, hydroxyl, nitrile, etc. For instance, arenediazonium salts react with copper(I) salts of chloride, bromide, or cyanide to form corresponding aryl chlorides, bromides, and nitriles. These reactions are named Sandmeyer reactions. Although the mechanism of this reaction is complicated, as illustrated in Figure 1, they are believed to progress via an aryl copper...
2.4K
1° Amines to Diazonium or Aryldiazonium Salts: Diazotization with NaNO2 Mechanism01:37

1° Amines to Diazonium or Aryldiazonium Salts: Diazotization with NaNO2 Mechanism

4.7K
Nitrous acid is a relatively weak and unstable acid prepared in situ by the reaction of sodium nitrite and cold, dilute hydrochloric acid. In an acidic solution, the nitrous acid undergoes protonation when it loses water to form a nitrosonium ion—an electrophile. Nitrous acid reacts with primary amines to give diazonium salts. The reaction is called diazotization of primary amines.
4.7K
Diazonium Group Substitution: –OH and –H01:19

Diazonium Group Substitution: –OH and –H

3.2K
Nitrous acid, a weak acid, is prepared in situ via the reaction of sodium nitrite with a strong acid under cold conditions. This nitrous acid prepared in situ reacts with primary arylamines to form arenediazonium salts. Such reactions are known as diazotization reactions. As shown in Figure 1, the formation of arenediazonium salts begins with the decomposition of nitrous acid in an acidic solution to give nitrosonium ions.
3.2K
1° Amines to Diazonium or Aryldiazonium Salts: Diazotization with NaNO2 Overview01:26

1° Amines to Diazonium or Aryldiazonium Salts: Diazotization with NaNO2 Overview

3.8K
Nitrous acid and nitric acids are two types of acids containing nitrogen, among which nitrous acid is weaker than nitric acid. Nitrous acid with a pKa value of 3.37 ionizes in water to give a nitrite ion and the hydronium ion.
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...
3.8K

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Related Experiment Video

Updated: Jan 8, 2026

Synthesis of 1,2-Azaborines and the Preparation of Their Protein Complexes with T4 Lysozyme Mutants
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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.

The Journal of Organic Chemistry
|December 15, 2025
PubMed
Summary
This summary is machine-generated.

Researchers developed novel boron and nitrogen-doped azaullazines (BNAzaUs) with unique bee-shaped structures. These materials exhibit dual emission and show promise for efficient solution-processed organic light-emitting diodes (OLEDs).

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Area of Science:

  • Materials Science
  • Organic Chemistry
  • Photophysics

Background:

  • Development of novel organic materials for optoelectronic applications is crucial.
  • Boron and nitrogen-doped heterocyclic compounds offer unique electronic and photophysical properties.

Purpose of the Study:

  • To synthesize and characterize novel BN-doped azaullazines with bee-shaped structures.
  • To investigate their photoluminescent properties and potential for organic light-emitting diodes (OLEDs).

Main Methods:

  • A three-step synthesis involving Clauson-Kaas pyrrole cyclization, Buchwald-Hartwig C-N coupling, and electrophilic borylation.
  • Single-crystal X-ray diffraction for structural confirmation.
  • Fabrication and characterization of solution-processed OLEDs.

Main Results:

  • Successfully synthesized three BN-doped azaullazines (BNAzaU-1, BNAzaU-2, BNAzaU-3) with planar, rigid π-conjugated frameworks.
  • Observed dual emission from localized excited and charge-transfer states.
  • BNAzaU-1 based OLED achieved a maximum luminance of 2218 cd m⁻² and 1.31% external quantum efficiency.

Conclusions:

  • The synthesized BN-doped azaullazines possess excellent structural and photoluminescent properties.
  • These materials demonstrate significant potential for high-performance, solution-processed OLEDs in solid-state lighting applications.