使用氮杂穴醚一步合成金纳米粒子及其在表面增强拉曼光谱和催化中的应用。

One-step synthesis of gold nanoparticles using azacryptand and their applications in SERS and catalysis.

作者信息

Lee Kang Yeol, Hwang Jaeyoung, Lee Young Wook, Kim Jineun, Han Sang Woo

机构信息

Department of Chemistry, Research Institute of Natural Science, Environmental Biotechnology National Core Research Center, Gyeongsang National University, Jinju 660-701, Korea.

出版信息

J Colloid Interface Sci. 2007 Dec 15;316(2):476-81. doi: 10.1016/j.jcis.2007.07.076. Epub 2007 Aug 6.

DOI:10.1016/j.jcis.2007.07.076

PMID:17727872

Abstract

A new aqueous-phase method for the preparation of stable gold nanoparticles by using 1,4,7,10,13,16,21,24-octaazabicyclo[8.8.8]hexacosane (azacryptand) as both reductant and stabilizer is reported. Reduction of HAuCl(4) with azacryptand at room temperature yields nano-sized particles within a short time. The obtained gold nanoparticles have been characterized by UV-vis spectroscopy, transmission electron microscopy, and X-ray diffraction. Comparison of FT-IR spectra of azacryptand before and after reaction revealed that azacryptand molecules reduce gold ions as the amino moieties in the molecules are oxidized to imino groups. The prepared gold nanoparticles show efficient surface-enhanced Raman scattering properties and can effectively catalyze reduction of 4-nitrophenol by sodium borohydride in aqueous solution.

摘要

报道了一种新的水相方法，该方法使用1,4,7,10,13,16,21,24-八氮杂双环[8.8.8]二十六烷（氮杂穴醚）作为还原剂和稳定剂来制备稳定的金纳米颗粒。在室温下用氮杂穴醚还原氯金酸（HAuCl₄）可在短时间内产生纳米尺寸的颗粒。所获得的金纳米颗粒已通过紫外-可见光谱、透射电子显微镜和X射线衍射进行了表征。反应前后氮杂穴醚的傅里叶变换红外光谱比较表明，由于分子中的氨基部分被氧化为亚氨基，氮杂穴醚分子还原了金离子。制备的金纳米颗粒表现出高效的表面增强拉曼散射特性，并且可以有效地催化硼氢化钠在水溶液中还原4-硝基苯酚。