Synthesis of amphiphilic Janus gold nanoparticles stabilized with triphenylphosphine and D-penicillamine by ligand exchange at toluene/water emulsion interface

IF 2.2 4区 工程技术 Q2 Chemistry Gold Bulletin Pub Date : 2020-03-14 DOI:10.1007/s13404-020-00274-1
Degui Li, Yujia Luo, Jiaxin Lan, Zhihong Luo, Fujie Li, Kun Luo
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引用次数: 3

Abstract

Ligand exchange was triggered at toluene/water emulsion interface between homogeneous gold nanoparticles (Au NPs) with triphenylphosphine (PPh3) and D-penicillamine (D-PA), resulted in amphiphilic Janus Au NPs with both phosphine and thiolate ligands. TEM and XRD analyses indicate that the product is composed of Au nanocrystals in an average diameter of about 3.7?nm. XPS, FTIR, Raman, and 1H NMR analyses demonstrate that the Au NPs are protected with hydrophilic D-PA molecules and lipophilic PPh3 ligands in a molecular ratio of ca. 1.8. The NOESY analysis and contact angle measurement further suggest that the D-PA and PPh3 molecules are spontaneously separated to form compartmentalized hydrophilic and lipophilic regions on the individual Au NPs, which exhibit good catalytic performance and recyclability on the reduction of 4-nitrophenol. The results demonstrate that amphiphilic Janus Au NPs can be synthesized by partly exchange of PPh3 with D-PA at toluene/water emulsion interface and are potentially applicable for other phosphine/thiolate pairs to modify Au NPs.

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三苯基膦和d -青霉胺稳定两亲性Janus金纳米粒子的合成
在甲苯/水乳界面上,均相金纳米粒子(Au NPs)与三苯基膦(PPh3)和d -青霉胺(D-PA)进行配体交换,得到两亲性Janus金纳米粒子(Au NPs)与膦和硫酸酯配体。TEM和XRD分析表明,产物由平均直径约3.7 nm的金纳米晶体组成。XPS、FTIR、拉曼和1H NMR分析表明,Au NPs受到亲水性D-PA分子和亲脂性PPh3配体的保护,分子比约为1.8。noesi分析和接触角测量进一步表明,D-PA和PPh3分子在单个Au NPs上自发分离形成亲水和亲脂区,对4-硝基苯酚还原表现出良好的催化性能和可回收性。结果表明,PPh3与D-PA在甲苯/水乳状液界面部分交换可合成两亲性Janus Au NPs,并可用于其他膦/硫酸对修饰Au NPs。
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来源期刊
Gold Bulletin
Gold Bulletin 工程技术-材料科学:综合
CiteScore
3.30
自引率
4.50%
发文量
0
审稿时长
3 months
期刊介绍: Gold Bulletin is the premier international peer reviewed journal on the latest science, technology and applications of gold. It includes papers on the latest research advances, state-of-the-art reviews, conference reports, book reviews and highlights of patents and scientific literature. Gold Bulletin does not publish manuscripts covering the snthesis of Gold nanoparticles in the presence of plant extracts or other nature-derived extracts. Gold Bulletin has been published over 40 years as a multidisciplinary journal read by chemists, physicists, engineers, metallurgists, materials scientists, biotechnologists, surface scientists, and nanotechnologists amongst others, both within industry and academia. Gold Bulletin is published in Association with the World Gold Council.
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