potassium | 25681-80-5

• 分子结构分类: 无机化合物 - 均相金属化合物 - 均相碱金属化合物
• 英文名称: potassium
• 英文别名: potassium dimer；(potassium)2
• CAS: 25681-80-5
• 化学式: K₂
• 分子量: 78.1966
• InChiKey: ZDHURYWHEBEGHO-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  -0.76
• 重原子数：
  2
• 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：

  potassium 以 not given 为溶剂， 生成 氢化钾
  参考文献：
  名称：

  Yamamoto, H., Japanese Journal of Physics, 1928, vol. 5, p. 153 - 153

  摘要：

  DOI：
• 作为产物：
  描述：

  氢化钾 以 gaseous matrix 为溶剂， 生成 potassium
  参考文献：
  名称：

  从获得的优化脉冲形状中学习钾二聚体的同位素选择性电离。

  摘要：

  通过在反馈回路中对成形的fs脉冲应用演化策略，提出了在三光子电离过程中39,39K2和39,41K2异构体的选择性优化。在不同中心波长处的优化显示，与另一种同位素相比，一种同位素有相当大的增强，反之亦然。我们将获得的针对组合相位和幅度与纯幅度调制的优化脉冲形状进行比较。特别是从它们的光谱中，我们能够通过所涉及的振动状态提取有关最佳选择的不同电离路径的信息。此外，给出了用于组合相位和幅度的优化脉冲形式的时间形状与纯相位优化的比较。提出的脉冲形式分析证明了有限优化的潜力，可以深入了解潜在的动力学过程。我们的方法揭示了优化算法如何在频谱和时间上精确地解决振动波函数。

  DOI：

  10.1063/1.1835267

文献信息

• Femtosecond vibrational wavepacket spectroscopy in the electronic ground state of K2
  作者：H. Schwoerer、R. Pausch、M. Heid、W. Kiefer

  DOI：10.1016/s0009-2614(98)00048-7

  日期：1998.3

  Vibrational wavepacket propagation in the electronic ground state |X〉 of supersonic jet cooled potassium dimers was investigated with a femtosecond pump–probe experiment. The wavepackets were generated by resonance enhanced stimulated Raman scattering into and interrogated by a time delayed three photon ionization process. The choice of the wavelength of the probe photons enabled a pure detection of

  通过飞秒泵浦-探针实验研究了超声速射流冷却的钾二聚体在电子基态| X〉中的振动波包传播。波包是通过共振增强的受激拉曼散射进入时延三光子电离过程并被其询问而产生的。探测光子波长的选择可以对基态波包动力学进行纯检测。周期为375 fs的波包振荡的傅里叶分析显示，在92 cm -1附近有一种受激发射泵浦的色度分量，在88 cm -1附近有受激拉曼泵浦的色度。
• Gmelin Handbuch der Anorganischen Chemie, Gmelin Handbook: K: MVol.1, 49, page 170 - 172
  作者：

  DOI：——

  日期：——
• Study of the chemiluminescent reaction between alkali dimers and oxygen atoms
  作者：H. Figger、R. Straubinger、H. Walther

  DOI：10.1063/1.441820

  日期：1981.7

  The reaction of alkali dimers with oxygen atoms has been studied in a crossed beam experiment. Strong chemiluminescence of the reaction products was observed. It is shown that the luminescence was emitted by alkali atoms from the reaction M2+O→MO+M (M alkali atom). M can be excited up to the exoergicity of this reaction at least in the cases M = Cs and Na. For M = Cs, detailed rate constants for the excitation of the different excited states have been determined using both laser induced fluorescence and chemiluminescence. The rates decrease nearly exponentially as a function of the excitation energy. They partly follow the expectation of statistical theories. Absolute reaction cross sections have been determined for all of the reactions investigated. They agree partially with those predicted by the harpoon model.
• Gmelin Handbuch der Anorganischen Chemie, Gmelin Handbook: K: MVol.1, 32, page 134 - 136
  作者：

  DOI：——

  日期：——
• Adiabatic unimolecular dissociation of heterogeneous alkali clusters
  作者：C. Bréchignac、Ph. Cahuzac、R. Pflaum、J. Ph. Roux

  DOI：10.1063/1.453872

  日期：1988.3.15

  The unimolecular dissociation of metastable photoionized mass-selected heterogeneous alkali clusters is investigated using a tandem time-of-flight spectrometer. NaK+n and Nan K+ are found to dissociate by evaporation of either a single neutral atom or a neutral dimer of the most abundant constituant. This behavior differs from the evaporation of heterogeneous neutral clusters which might always evaporate potassium in order to explain the sodium enrichment in the NaxKy neutral cluster distributions. This difference in the dissociation patterns of neutral and ionic heterogeneous clusters puts into evidence the influence of the charge in unimolecular dissociation processes.