argon

• 分子结构分类: 无机化合物 - 均质非金属化合物 - 均质惰性气体
• 英文名称: argon
• 化学式: Ar₃
• 分子量: 119.844
• InChiKey: BJURWZBIJTZDMV-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  0.0
• 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：

  argon 以 gas 为溶剂， 生成 、 氩
  参考文献：
  名称：

  On the role of dissociative ionization in the formation of argon dimer ions

  摘要：

  The formation of Ar2+ ions has been investigated by means of the threshold photoelectron photoion coincidence (TPEPICO) technique. Two pathways for the formation of Ar2+ ions are important. One is a direct path via excitation of Rydberg states of Ar2 with consecutive autoionization. The other path is dissociative ionization of larger argon clusters, in this case argon trimers. These two pathways lead to Ar2+ ions with different internal energy. The pathways are easily distinguished in the TPEPICO-TOF spectra by the kinetic energy released (KER) in the dissociative ionization. The KER for the reaction Ar3+ --> Ar2+ + Ar was measured as a function of the photon energy and compared to the KER expected from statistical theory. The agreement is satisfying and confirms that Ar3+ ions do indeed dissociate at the thermochemical threshold. At higher photon energy the excited 2PI(3/2)g state of Ar3+ is also detected from a second component in the KER. By applying a kinetic energy discrimination it is possible to measure cluster ion spectra in the presence of larger clusters but essentially without interference from the latter.

  DOI：

  10.1007/bf01437137
• 作为产物：
  描述：

  氩 生成 argon
  参考文献：
  名称：

  Ar 3 +的光解离动力学

  摘要：

  被质量选择的Ar 3 +团簇通过极化的氩离子激光束在514、488和458 nm处进行光解。仅观察到Ar + / 2Ar产物。产品实验室动能峰形状的激光偏振依赖性表明，“纯”平行跃迁是光解离的原因。分析表明它是几乎一定是2 Σ ü + ← 2 Σ克+导致过渡的Ar +（2 P）。产物动能分布为强双峰分布，高动能（接近节能极限）下约有75％的产品，动能接近零时为约25％的产品。开发了一个模型，该模型解释了此意外（动态信息）结果。

  DOI：

  10.1016/s0009-2614(89)87444-5

文献信息

• Microwave electronic spectra of the Ar2+ and Ne2+ ions: a combined neutral/ion molecular beam technique
  作者：Alan Carrington、Andrew M. Shaw、Susie M. Taylor

  DOI：10.1016/0009-2614(95)00644-j

  日期：1995.8

  a new ion source in which a nozzle beam of neutral molecules is ionised by an electron beam and the resulting molecular ion beam is studied by microwave spectroscopic methods. This ionisation technique results in significant population of the near-dissociation levels of the molecular ion, so that a sensitive state-selective electric field dissociation method can be used to detect the spectra. We have

  我们描述了一种新的离子源，其中中性分子的喷嘴束被电子束电离，并通过微波光谱法研究所得的分子离子束。这种电离技术会导致大量的分子离子接近解离水平，因此可以使用敏感的状态选择电场解离方法来检测光谱。我们已经观察到Ar 2 +和Ne 2 +离子的第一个状态间共振电子光谱。
• Collision-induced reaction of Ar+n with Kr
  作者：Masahiko Ichihashi、Jun Hirokawa、Shinji Nonose、Takashi Nagata、Tamotsu Kondow

  DOI：10.1016/0009-2614(93)90000-q

  日期：1993.3

  Collision-induced reaction of Ar+n (n=2−15) with Kr was studied at collision energies from 0.1 to 2.0 eV (center-of-mass) by means of a tandem mass-spectrometer equipped with octopole ion guides. The reaction was found to proceed via Ar-atom evaporation from Ar+n, charge transfer from Ar+n to Kr or fusion of Ar+n with Kr. The absolute cross sections for these processes were measured as functions of

  通过配备八极杆离子导向器的串联质谱仪研究了碰撞能量为0.1至2.0 eV（质量中心）时Ar + n（n = 2-15）与Kr的碰撞诱导反应。发现反应通过氩原子蒸发选自Ar继续+ Ñ，选自Ar电荷转移+ Ñ到氪或Ar的融合+ Ñ与Kr。测量这些过程的绝对横截面，作为母簇离子的大小和碰撞能量的函数。蒸发过程的解释是母体簇离子的碰撞激发，然后通过蒸发使“热”母体簇离子单分子解离。电荷转移被认为最有效地进行在ñ ⩽6大概范围，因为它的能量学。另一方面，在所研究的整个尺寸范围内都大力进行熔化过程，其横截面可以通过Ar + n的几何横截面来近似。
• Electron beam fluorescence spectrometry of internal state populations in nozzle beams of nitrogen and nitrogen/rare gas mixtures
  作者：M. Faubel、E. R. Weiner

  DOI：10.1063/1.442103

  日期：1981.7.15

  Rotational level populations of N2 were measured downstream from the skimmer in beams of pure N2 and in mixtures of N2 with He, Ne, and Ar expanded from room temperature nozzles. The range of p0D was from 5 to 50 Torr cm. The formation of dimers and higher condensates of beam species was monitored during the runs. The effect of condensation energy release on rotational populations and parallel temperatures was readily observed. Two different methods for evaluating the rotational population distributions were compared. One method is based on a dipole-excitation model and the other on an excitation matrix obtained empirically. Neither method proved clearly superior. Both methods indicated nonequilibrium rotational populations for all of our room temperature nozzle expansion conditions. Much of the nonequilibrium character appears to be due to the behavior of the K = 2 and K = 4 levels, which may be accounted for in terms of the rotational energy level spacing. In particular, the overpopulation of the K = 4 level is explained by a near-resonant transfer of rotational energy between molecules in the K = 6 and K = 0 states, to give two molecules in the K = 4 state. Rotational and vibrational temperatures were determined for pure N2 beams from nozzles heated up to 1700 °K. The heated nozzle experiments indicated a 40% increase in the rotational collision number between 300 and 1700 °K.
• Formation and stabilities of cluster ions Ar⁺_<i>n</i>
  作者：Kenzo Hiraoka、Toshiharu Mori

  DOI：10.1063/1.456245

  日期：1989.6.15

  Temperature dependence of the rate constants for the clustering reaction, Ar+(2P3/2)+2Ar=Ar+2(2Σ+u)+Ar, was measured in the temperature range 300–55 K using a pulsed electron-beam mass spectrometer. The rate constant shows a steady increase with decrease of temperature, from 2.0×10−31 cm6/s at 300 K to 7×10−31 cm6/s at 55 K. The metastable atomic ion Ar+(2P1/2) was found to start to form the cluster ion Ar+2 below 130 K. The thermochemical stabilities of the cluster ions Ar+n were also determined with n=3–11. A sudden drop in the −ΔH0n−1,n values was observed between n=3 and 4, indicating that the Ar+3 ion is the core in the cluster Ar+n.
• The decay dynamics of photoexcited rare gas cluster ions
  作者：A. B. Jones、P. R. Jukes、A. J. Stace

  DOI：10.1063/1.479378

  日期：1999.7.15

  The kinetic energies of fast neutrals ejected from photoexcited rare gas cluster ions have been measured for the following systems: Arn+, Krn+, Xen+ at two photon wavelengths: 355 and 532 nm, and for n in the range 2–19. New data are presented for xenon at both wavelengths, and for argon and krypton cluster ions at 355 nm. For argon and krypton cluster ions at 532 nm, new data have been recorded which are more accurate than those presented previously. A Monte Carlo model of the experiment has been used to simulate the kinetic energy releases and also to investigate variations in the scattering anisotropy parameter (β) as a function of photon energy and cluster composition and size. Significant fluctuations in β are observed, and these are attributed to a combination of structural variation and changes to the nature of the central chromophore. For small cluster ions the kinetic energy release data show evidence of being influenced by the final spin-orbit state of the atomic ion. Overall, there is a gradual decline in kinetic energy release as a function of increasing cluster size; however, there are marked variations within this trend. For all three rare gas systems the results show that the primary response to photoexcitation is the ejection of a single atom with a high kinetic energy on a time scale that is short compared with the rotational period of a cluster.