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学科主题: 高分子化学
题名: Stability and Catalytic Activity of PEG-b-PS-Capped Gold Nanoparticles: A Matter of PS Chain Length
其他题名: Stability and Catalytic Activity of PEG-b-PS-Capped Gold Nanoparticles: A Matter of PS Chain Length
作者: Que YR(却玉蓉); Feng C(冯纯); Zhang S(张森); Huang XY(黄晓宇)
通讯作者: 冯纯 ; 黄晓宇
刊名: J. Phys. Chem. C
发表日期: 2015
DOI: 10.1021/jp511850v
卷: 119, 期:4, 页:1960-1970
收录类别: SCI
文章类型: 论文
英文摘要: Gold nanoparticles (AuNPs) covered with a series of well-defined poly(ethylene glycol)-b-polystyrene (PEG-b-PS) amphiphilic diblock copolymers containing a thiol group at the end of PS block were prepared to explore the influence of chain length of PS segment on the colloidal stability and catalytic activity of AuNPs. PEG-b-PS amphiphilic diblock copolymers with different PS chain lengths and narrow molecular distributions (M-w/M-n = 1.15) were synthesized by reversible additionfragmentation chain transfer (RAFT) polymerization employing a PEG-based macromolecular chain transfer agent (M-n <= 2000 g/mol), followed by transforming the thiocarbonate end functionality into a thiol group in the presence of 2-aminoethanol and tributylphosphane. PEG-b-PS-stabilized gold nanoparticles (Au@PEG-b-PS) were prepared by ligand exchange reaction between citrate-stabilized AuNPs and the thiol end group of PEG-b-PS diblock copolymer. The presence of the hydrophobic PS layer not only improved the stability of Au@PEG-b-PS against electrolyte-induced aggregation but also greatly promoted the resistance of Au@PEG-b-PS against competitive displacement of dithiothreitol. Au@PEG-b-PS showed excellent catalytic activity in the reduction reaction of 4-nitrophenol into 4-aminophenol, and the catalytic activity increased with the decrease in the chain length of PS block. In addition, the high stability imparted by the PS layer endowed Au@PEG-b-PS with good reusability in catalysis without the loss of catalytic activity.
语种: 英语
相关网址: 查看原文
WOS记录号: WOS:000348753000040
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内容类型: 期刊论文
URI标识: http://ir.sioc.ac.cn/handle/331003/39834
Appears in Collections:高分子材料研究室_期刊论文

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作者单位: 中科院上海有机化学研究所, 有机功能分子合成与组装化学重点实验室

Recommended Citation:
Que YR,Feng C,Zhang S,et al. Stability and Catalytic Activity of PEG-b-PS-Capped Gold Nanoparticles: A Matter of PS Chain Length[J]. J. Phys. Chem. C,2015,119(4):1960-1970.
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