Gold--silver (1/3) | 66530-85-6

• 分子结构分类: 无机化合物 - 均相金属化合物 - 均相过渡金属化合物
• 英文名称: Gold--silver (1/3)
• 英文别名: gold;silver
• CAS: 66530-85-6
• 化学式: Ag₃Au
• 分子量: 520.571
• InChiKey: GNQFJJXROZDJMN-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  -0.01
• 重原子数：
  4
• 可旋转键数：
  0
• 环数：
  0.0
• sp3杂化的碳原子比例：
  0.0
• 拓扑面积：
  0
• 氢给体数：
  0
• 氢受体数：
  0

反应信息

• 作为产物：
  描述：

  gold 、 silver nitrate 在 维生素 C 作用下， 以 水 、 乙腈 为溶剂， 反应 0.17h， 生成 Gold--silver (1/3)
  参考文献：
  名称：

  Fully Alloyed Ag/Au Nanospheres: Combining the Plasmonic Property of Ag with the Stability of Au

  摘要：

  We report that fully alloyed Ag/Au nanospheres with high compositional homogeneity ensured by annealing at elevated temperatures show large extinction cross sections, extremely narrow bandwidths, and remarkable stability in harsh chemical environments. Nanostructures of Ag are known to have much stronger surface plasmon resonance than Au, but their applications in many areas have been very limited by their poor chemical stability against nonideal chemical environments. Here we address this issue by producing fully alloyed Ag/Au nanospheres through a surface-protected annealing process. A critical temperature has been found to be around 930 degrees C, below which the resulting alloy nanospheres, although significantly more stable than pure silver nanoparticles, can still gradually decay upon extended exposure to a harsh etchant. Nanospheres annealed above the critical temperature show a homogeneous distribution of Ag and Au, minimal crystallographic defects, and the absence of structural and compositional interfaces, which account for the extremely narrow bandwidths of the surface plasmon resonance and may enable many plasmonic applications with high performance and long lifetime, especially for those involving corrosive species.

  DOI：

  10.1021/ja502890c

文献信息

• Green synthesis and applications of Au–Ag bimetallic nanoparticles
  作者：M. Meena Kumari、John Jacob、Daizy Philip

  DOI：10.1016/j.saa.2014.08.079

  日期：2015.2

  This paper reports for the first time the synthesis of bimetallic nanoparticles at room temperature using the fruit juice of pomegranate. Simultaneous reduction of gold and silver ions in different molar ratios leads to the formation of alloy as well as core–shell nanostructures. The nanoparticles have been characterized using UV–vis spectroscopy, transmission electron microscopy, Fourier Transform

  本文首次报道了使用石榴汁在室温下合成双金属纳米颗粒的方法。同时减少不同摩尔比的金和银离子会导致合金以及核-壳纳米结构的形成。使用紫外可见光谱，透射电子显微镜，傅立叶变换红外光谱和X射线衍射对纳米颗粒进行了表征。合成的合金颗粒在2-，3-，4-硝基苯酚还原成相应的胺以及甲基橙的降解中用作催化剂。所有反应的还原动力学遵循伪一级。速率常数遵循k 4-硝基苯酚 <  k 2-硝基苯酚 < k 3-硝基苯酚。测量作为体积分数的函数的热导率，并且观察到合金纳米颗粒的掺入提高了显示出纳米流体应用的基础流体（水）的热导率。纳米颗粒显示的一氧化氮和羟基自由基清除活性有望在生物医学领域中应用。
• Synergistic Effect in an Au−Ag Alloy Nanocatalyst:  CO Oxidation
  作者：Jun-Hong Liu、Ai-Qin Wang、Yu-Shan Chi、Hong-Ping Lin、Chung-Yuan Mou

  DOI：10.1021/jp044938g

  日期：2005.1.1

  Au-Ag alloy nanoparticles supported on mesoporous aluminosilicate have been prepared by one-pot synthesis using hexadecyltrimethylammonium bromide (CTAB) both as a stabilizing agent for nanoparticles and as a template for the formation of mesoporous structure. The formation of Au-Ag alloy nanoparticles was confirmed by X-ray diffraction (XRD), ultraviolet-visible (UV-vis) spectroscopy, and transmission electron microscopy (TEM). Although the Au-Ag alloy nanoparticles have a larger particle size than the monometallic gold particles, they exhibited exceptionally high activity in catalysis for low-temperature CO oxidation. Even at a low temperature of 250 K, the reaction rate can reach 8.7 x 10(-6) mol(.)g(cat.)(-1.)s(-1) at an Au/Ag molar ratio of 3/1. While neither monometallic Au@MCM-41 nor Ag@MCM-41 shows activity at this temperature, the Au-Ag alloy system shows a strongly synergistic effect in high catalytic activity. In this alloy system, the size effect is no longer a critical factor, whereas Ag is believed to play a key role in the activation of oxygen.
• Enhanced nonlinear optical responses of zinc diaminopyrimidin-2-ylthio phthalocyanine conjugated to AgxAuy alloy nanoparticles
  作者：Owolabi M. Bankole、Olawale Osifeko、Tebello Nyokong

  DOI：10.1016/j.jphotochem.2016.06.025

  日期：2016.10

  In this article, the photophysical and nonlinear optical (NLO) characterizations of diaminopyrimidin-2-ylthio phthalocyaninatozinc (II) (2) before and after conjugation to AgxAuy nano-alloys are discussed. Phthalocyanines-AgxAuy (2-AgxAuy) composites showed enhanced triplet state and nonlinear optical behaviour when compared to free phthalocyanine. Optical limiting (OL) responses of the samples were evaluated using Z-scan technique at 532 nm and 10 ns in dimethyl sulfoxide. Reverse saturable absorption (RSA), which is a direct consequence of triplet absorption of already excited molecules was observed as the dominant mechanism responsible for nonlinearity of the samples. By virtue of the magnitude of absorption coefficients and other NLO optical parameters estimated in this work, 2-AgxAuy composites were found to exhibit stronger optical limiting responses than unconjugated phthalocyanine. The large third-order susceptibilities of the composites make them suitable materials for attenuating modern laser radiations, and also found useful in various optical applications. (C) 2016 Elsevier B.V. All rights reserved.
• High and stable surface-enhanced Raman spectroscopy activity of h-BN nanosheet/Au1Ag3 nanoalloy hybrid membrane for melamine determination
  作者：Kun Ge、Qiyue Wu、Yonghui Li、Ying Gu

  DOI：10.1016/j.saa.2022.120952

  日期：2022.4