Polymers via Reversible Addition–Fragmentation Chain Transfer Polymerization with High Thiol End-Group Fidelity for Effective Grafting-To Gold Nanoparticles,The Journal of Physical Chemistry Letters

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Polymers via Reversible Addition–Fragmentation Chain Transfer Polymerization with High Thiol End-Group Fidelity for Effective Grafting-To Gold Nanoparticles
The Journal of Physical Chemistry Letters ( IF 4.8 ) Pub Date : 2021-05-13 , DOI: 10.1021/acs.jpclett.1c01039
Yu-Xi Wang ₁ , Yang Li ₁ , Shi-Hui Qiao ₁ , Jing Kang ₁ , Zhi-Li Shen ₁ , Ning-Ning Zhang ₁ , Zesheng An ₁ , Xiaosong Wang ₂ , Kun Liu ₁

Affiliation

End-group fidelity is the most important property for end-functional polymers. Compared to other controlled living polymerization methods, reversible addition–fragmentation chain transfer (RAFT) polymerization often yields polymers with a lower end-group fidelity, which greatly affects their applications. Herein, we report a staged-thermal-initiation RAFT polymerization for the synthesis of polymers with high thiol end-group fidelity and their high efficiencies for grafting to various gold nanoparticles (GNPs). We experimentally prove that the decrease of end-group fidelity with their molecular weight is caused by the gradual decomposition of the initiator rather than the degradation of chain-transfer agents. We show that the staged-thermal-initiation RAFT polymerization is more effective for synthesis of polymers with high thiol end-group fidelity. The grafting-to assays for various GNPs illustrate the positive correlation between the end-group fidelity of polymers and grafting-to efficiency. This work highlights the prospects for synthesis of high end-group fidelity polymers and their application in the preparation of nanoparticles–polymer hybrid materials.

中文翻译：

通过具有高硫醇端基保真度的可逆加成-断裂链转移聚合进行聚合物，从而有效地接枝到金纳米颗粒上

端基保真度是最终功能聚合物最重要的性能。与其他受控活性聚合方法相比，可逆加成-断裂链转移（RAFT）聚合通常会产生具有较低端基保真度的聚合物，这极大地影响了它们的应用。在本文中，我们报道了分阶段的热引发RAFT聚合反应，用于合成具有高硫醇端基保真度的聚合物以及它们接枝到各种金纳米颗粒（GNP）上的高效率。我们实验证明，端基保真度随分子量的降低是由引发剂的逐步分解而不是链转移剂的降解引起的。我们表明，分段热引发RAFT聚合对于合成具有高硫醇端基保真度的聚合物更有效。各种GNP的接枝试验说明了聚合物端基保真度与接枝效率之间的正相关。这项工作突出了高端端基保真度聚合物的合成及其在制备纳米颗粒-聚合物杂化材料中的应用前景。

更新日期：2021-05-20

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