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Synthesis of Information-bearing Peptoids and their Sequence-directed Dynamic Covalent Self-assembly

Synthesis of Information-bearing Peptoids and their Sequence-directed Dynamic Covalent Self-assembly

Published on: February 6, 2020

Azo Coupling Reaction Induced Macromolecular Self-Assembly in Aqueous Solution.

Shang Li¹, Jilei Wang¹, Jiajia Shen¹

¹Department of Chemical Engineering, Key Laboratory of Advanced Materials (MOE), Tsinghua University, Beijing, 100084, China.

ACS Macro Letters

|May 27, 2022

Summary

Azo coupling reaction triggers macromolecular self-assembly in water. This process creates enzyme-responsive fluorescent nanoparticles from diblock copolymers, enabling new diagnostic tools.

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Published on: September 20, 2017

Area of Science:

Polymer Chemistry
Materials Science
Supramolecular Chemistry

Background:

Diblock copolymers offer versatile platforms for self-assembly.
Azo coupling reactions are useful for creating dynamic covalent bonds.
Macromolecular self-assembly is key for designing functional nanomaterials.

Purpose of the Study:

To investigate azo coupling reaction-induced macromolecular self-assembly in aqueous solution.
To synthesize diblock copolymers capable of forming self-assembled structures.
To develop enzyme-triggered fluorescent nanoparticles.

Main Methods:

Synthesis of PEG-b-PSNHBoc diblock copolymer via RAFT polymerization.
Deprotection and diazotization to form PEG-b-PSN2+ macromolecular diazonium salts.
Azo coupling reaction with N,N-dimethylaniline to induce self-assembly and nanoparticle formation.

Main Results:

Successful synthesis of diblock copolymers and their transformation into macromolecular diazonium salts.
Azo coupling reaction led to the formation of azobenzene pendants, inducing hydrophobic aggregation.
Self-assembled colloidal particles exhibited enzyme-triggered fluorescent behavior upon incorporation of a fluorescent group.

Conclusions:

Azo coupling reaction is an effective method for inducing macromolecular self-assembly in aqueous media.
The resulting self-assembled nanoparticles demonstrate potential for enzyme-responsive applications.
This approach provides a novel route for designing functional nanomaterials with tunable properties.