purple gold | 12004-03-4

• 分子结构分类: 无机化合物 - 混合金属/非金属化合物 - 各种混合金属/非金属
• 英文名称: purple gold
• 英文别名: Aluminium--gold (2/1)；alumane;gold
• CAS: 12004-03-4
• 化学式: Al₂Au
• 分子量: 250.93
• InChiKey: YLLXGUHTIDSLHG-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  -2.37
• 重原子数：
  3
• 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

• 作为反应物：
  描述：

  purple gold 在 NaOH 作用下， 以 水 为溶剂， 生成 金
  参考文献：
  名称：

  A benign route to fabricate nanoporous gold through electrochemical dealloying of Al–Au alloys in a neutral solution

  摘要：

  Nanoporous gold (NPG) ribbons have been fabricated through electrochemical dealloying of melt-spun Al-Au alloys with 20-50 at.% Au in a 10 wt.% NaCl aqueous solution under potential control at room temperature. The microstructures of NPG were characterized using X-ray diffraction (XRD), field-emission scanning electron microscopy (FE-SEM) and energy dispersive X-ray (EDX) analysis. The microstructures of the NPG ribbons strongly depend upon the phase constitutions of the starting Al-Au alloys. The single-phase Al2Au or AlAu intermetallic compound can be fully dealloyed, resulting in the formation of NPG with a homogeneous porous structure. The separate dealloying of Al2Au and AlAu in the two-phase Al-45 Au alloy leads to the formation of NPG composites (NPGCs). In addition, the dealloying of the Al-20 Au alloy comprising alpha-Al and Al2Au leads to the formation of NPG with bimodal channel size distributions. According to the ligament size, the surface diffusivity of Au adatoms along the alloy/electrolyte interface has been evaluated and increases with increasing applied potential. The dealloying mechanism in the neutral NaCl solution has been explained based upon pourbaix diagram and chloride ion effect. (C) 2009 Elsevier Ltd. All rights reserved.

  DOI：

  10.1016/j.electacta.2009.05.089
• 作为产物：
  描述：

  金 、 氢化铝 以 melt 为溶剂， 生成 purple gold
  参考文献：
  名称：

  Electronic properties of gold–aluminium intermetallic compounds

  摘要：

  The intermetallic compounds in the Au-Al system were studied by Au-197 Mossbauer spectroscopy. The observed isomer shifts and electric quadrupole splittings are compared with the electron densities and electric field gradients at the gold nuclei obtained by LAPW calculations using the WIEN97 computer code. This provides insights into the electronic structure of Au-Al alloys and yields values for the groundstate quadrupole moment of Au-197 and for the change of the nuclear charge radius for the 77 keV transition of Au-197. (C) 2002 Elsevier Science B.V. All rights reserved.

  DOI：

  10.1016/s0925-8388(02)01203-3

文献信息

• Al₃AuIr: A New Compound in the Al–Au–Ir System
  作者：Joris Kadok、Marie-Cécile de Weerd、Pascal Boulet、Émilie Gaudry、Yuri Grin、Vincent Fournée、Julian Ledieu

  DOI：10.1021/acs.inorgchem.5b00946

  日期：2015.8.17

  structure type (space group P3̅m1) with a = 4.2584(5) Å and c = 5.1991(7) Å. This compound is isostructural to the Al3Cu1.5Co0.5 phase also found in the Al-rich part of the Al–Cu–Co ternary diagram. Experimental evidence combined with ab initio calculations point toward an Al3AuIr phase stabilized by a Hume–Rothery mechanism. Quantum chemical calculations indicate two-center and multicenter interactions

  在Al–Au–Ir系统的富含Al的区域发现了一种新的具有Al 3 AuIr组成的三元相。差热分析表明990℃的熔点，和单晶X射线衍射测定表明，该三元相采用的Ni 2的Al 3结构式（空间群P 3米与1）一个= 4.2584（5）并且c = 5.1991（7）Å。该化合物与在Al-Cu-Co三元图的富Al部分中也发现的Al 3 Cu 1.5 Co 0.5相同构。实验证据与从头算的结合指向Al 3休ume-瑞利机理使AuIr相稳定。量子化学计算表明在Al 3 AuIr相中有两个中心和多个中心的相互作用。由具有四个中心键和五个中心键的区域分隔开的两个中心相互作用的分层分布表明，在垂直于[001]方向的褶皱平面上，该材料优先断裂。
• : new ternary aluminides grown from aluminum flux
  作者：S.E. Latturner、D. Bilc、J.R. Ireland、C.R. Kannewurf、S.D. Mahanti、M.G. Kanatzidis

  DOI：10.1016/s0022-4596(02)00006-3

  日期：2003.1

  A series of ternary aluminide intermetallics with a new structure type were formed from the reaction of gold and rare-earth metals in aluminum flux. The REAAu(3)Al(7) structure was obtained with all rare earths RE with the exception of La and Eu. These materials crystallize in the rhombohedral space group R-3c, with unit cell parameters a = 8.0922(6) Angstrom and c = 21.066(2) Angstrom for PrAu3Al7 as an example. The variation in cell edges with rare-earth size is regular with the exception of the Yb analogue. The possible mixed valency indicated by this result was confirmed by magnetic susceptibility measurements. Density functional theory-based band structure calculations on YbAu3Al7 indicate the ytterbium f-orbitals are located just below the Fermi level, further supporting the mixed valence description of this material. (C) 2002 Elsevier Science (USA). All rights reserved.
• AuAl2 and PtAl2 as potential plasmonic materials
  作者：V.J. Keast、B. Zwan、S. Supansomboon、M.B. Cortie、P.O.Å. Persson

  DOI：10.1016/j.jallcom.2013.06.161

  日期：2013.11

  The dielectric functions of PtAl2, AuAl2 and hypothetical intermediate alloys of the two in the form of AuxPt1-xAl2 were calculated from first principles using density functional theory (DFT) and the random phase approximation (RPA). From these, the reflectivity, electron energy-loss spectra (EELS) and small sphere extinction spectra are predicted. The experimental reflectivity and EELS were measured for PtAl2 and showed good agreement with the theoretical spectra. The yellow color of PtAl2 is associated with a bulk plasmon at 3 eV. We predict that the optical properties of hypothetical intermediate alloys would show a smooth evolution with composition. The details of this change can be understood by examination of the underlying density of states (DOS). The predicted small sphere extinction spectra and quality factors show a strong surface plasmon resonance for these materials, with PtAl2 having the optimum performance. The results indicate that these materials are good candidates for applications in plasmonics. (C) 2013 Elsevier B.V. All rights reserved.
• Gmelin Handbuch der Anorganischen Chemie, Gmelin Handbook: Al: MVol.A6, 6.22, page 1095 - 1104
  作者：

  DOI：——

  日期：——
• High-resolution valence band XPS studies of thin film Au–Al alloys
  作者：H. Piao、N.S. McIntyre

  DOI：10.1016/s0368-2048(01)00234-1

  日期：2001.7

  The Maximum Entropy Method (MEM) has been used to deconvolute the valence-band XPS spectra of thin film Au-Al alloys. The enhanced resolution allows fine changes in the electronic structures of the thin film alloys to be distinguished with the aid of the Au4f core-level spectra. This particular alloy series allows one to examine the 5d electronic interaction between gold atoms as aluminum is gradually added to the matrix. Aluminum is shown to have a much stronger quenching effect on such interactions than has been found previously for copper. (C) 2001 Elsevier Science B.V. All rights reserved.