Volume 137, Issue 9 e202419640
Forschungsartikel

Polymer Ligands with Multi-Nitrogen Heterocyclic Carbenes for Enhanced Stability and Reactivity in Nanoparticle Surface Functionalization

Jing Tao

Jing Tao

State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecule Science, Fudan University, Shanghai, 200438 People's Republic of China

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Di Zheng

Di Zheng

State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecule Science, Fudan University, Shanghai, 200438 People's Republic of China

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Yutian Tang

Yutian Tang

State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecule Science, Fudan University, Shanghai, 200438 People's Republic of China

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Dr. Huibin He

Dr. Huibin He

State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecule Science, Fudan University, Shanghai, 200438 People's Republic of China

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Dr. Yan Zhang

Dr. Yan Zhang

State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecule Science, Fudan University, Shanghai, 200438 People's Republic of China

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Dr. Yanqiong Yang

Dr. Yanqiong Yang

State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecule Science, Fudan University, Shanghai, 200438 People's Republic of China

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Dr. Liwei Dai

Dr. Liwei Dai

State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecule Science, Fudan University, Shanghai, 200438 People's Republic of China

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Huaining Zha

Huaining Zha

State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecule Science, Fudan University, Shanghai, 200438 People's Republic of China

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Prof. Yutao Sang

Corresponding Author

Prof. Yutao Sang

State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecule Science, Fudan University, Shanghai, 200438 People's Republic of China

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Prof. Zhihong Nie

Corresponding Author

Prof. Zhihong Nie

State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecule Science, Fudan University, Shanghai, 200438 People's Republic of China

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First published: 26 January 2025
Citations: 1

Abstract

Nitrogen heterocyclic carbenes (NHCs) are emerging as effective substitutes for conventional thiol ligands in surface functionalization of nanoparticles (NPs), offering exceptional stability to NPs under harsh conditions. However, the highly reactive feature of NHCs limits their use in introducing chemically active groups onto the NP surface. Herein, we develop a general yet robust strategy for the efficient surface functionalization of NPs with copolymer ligands bearing various functional groups. The polymer ligands consist of a multiple NHCs block, utilized for surface binding on NPs, alongside a poly(reactive ester) block intended for incorporating functional groups. The multiple NHCs block enables NPs with excellent colloidal stability across a broader range of pH values (0–14), temperature variations (–78 °C-100 °C), and electrolyte concentrations (0–1000 mM). Through the in situ ammonolysis of the poly(reactive ester) block, various active functional groups can be individually or together introduced on the NP surface. We further demonstrate the chemical reactivity of these functionalized NPs, including addition polymerization, Diels–Alder and Schiff base reactions. This method is applicable to various types of NPs, including metal NPs, metal oxide NPs, and even upconversion NPs, thereby paving new pathways for the design and creation of nanoparticle-based functional materials.

Conflict of Interests

The authors declare no conflict of interest.

Data Availability Statement

The data that support the findings of this study are available from the corresponding author upon reasonable request.

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