Fabrication of gold nanoparticles through autoreduction of chloroaurate ions by thermo- and pH-responsive amino acid-based star-shaped copolymers

doi:10.1016/j.polymer.2012.12.040

CORC > 化学研究所 > 中国科学院化学研究所

	Fabrication of gold nanoparticles through autoreduction of chloroaurate ions by thermo- and pH-responsive amino acid-based star-shaped copolymers
	Bao, Youmei 1,2; Shen, Guorong 1,2; Liu, Hewen 3; Li, Yuesheng 1
刊名	POLYMER
	2013-01-24
卷号	54 期号:2 页码:652-660
关键词	Gold Nanoparticles (Aunps) Star Polymers Amino Acid
ISSN号	0032-3861
DOI	10.1016/j.polymer.2012.12.040
英文摘要	Using a micelle-like star polymer as both stabilizer and reductant, a one-pot procedure to ultrastable, narrow-sized and pH-responsive Au nanocomposites in aqueous solution was described. The water-soluble copolymer was composed of a hydrophobic alanine-based hyperbranched poly(ester amide) (HBPEA) core containing thioether moieties, and numerous hydrophilic poly[2-(dimethylamino)ethyl methacrylate] (PDMAEMA) arms. The process was proposed that the Au ions were firstly coordinated and reduced by the amino groups in PDMAEMA arms, and then transferred to thioether ligands in the HBP core, driven by higher affinity of sulfur atom to Au than amine ligand. Growth of the sequentially reduced Au atoms from these nucleis contributes to formation of narrow-sized and ultrastable AuNPs. The size of the prepared AuNPs shifted in response to PDMAEMA arm length, especially pH, indicating that the star-shaped polymers acted as not only a size-tunable nanoreactor but also a pH-sensitive matrix. The nanocomposites were employed in situ as the catalysts for the reduction of p-nitrophenol, exhibiting excellent catalytic activities under mild conditions due to efficient encapsulation of the substrate to the large void spaces near the AuNP surfaces by the HBP core. The thermo-responsible property of the nanocomposites was favorable of catalyst recycle and other applications. (C) 2012 Elsevier Ltd. All rights reserved.
语种	英语
出版者	ELSEVIER SCI LTD
WOS记录号	WOS:000314085000024
内容类型	期刊论文
源URL	[http://ir.iccas.ac.cn/handle/121111/46583]
专题	中国科学院化学研究所
通讯作者	Li, Yuesheng
作者单位	1.Chinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Polymer Phys & Chem, Changchun 130022, Peoples R China 2.Chinese Acad Sci, Grad Sch, Changchun Branch, Changchun 130022, Peoples R China 3.Univ Sci & Technol China, Dept Polymer Sci & Engn, Hefei 230026, Peoples R China
推荐引用方式 GB/T 7714	Bao, Youmei,Shen, Guorong,Liu, Hewen,et al. Fabrication of gold nanoparticles through autoreduction of chloroaurate ions by thermo- and pH-responsive amino acid-based star-shaped copolymers[J]. POLYMER,2013,54(2):652-660.
APA	Bao, Youmei,Shen, Guorong,Liu, Hewen,&Li, Yuesheng.(2013).Fabrication of gold nanoparticles through autoreduction of chloroaurate ions by thermo- and pH-responsive amino acid-based star-shaped copolymers.POLYMER,54(2),652-660.
MLA	Bao, Youmei,et al."Fabrication of gold nanoparticles through autoreduction of chloroaurate ions by thermo- and pH-responsive amino acid-based star-shaped copolymers".POLYMER 54.2(2013):652-660.