| 149358-32-7

• 分子结构分类: 有机化合物
• CAS: 149358-32-7
• 化学式: ArB
• 分子量: 50.759
• InChiKey: SWUFVGDOKNCVQV-UHFFFAOYSA-N

反应信息

• 作为产物：
  描述：

  氩 、 diborane(6) 以 gaseous matrix 为溶剂， 生成
  参考文献：
  名称：

  A collaborative theoretical and experimental study of the structure and electronic excitation spectrum of the Bar and Bar2 complexes

  摘要：

  We report the investigation of the 3s←2p transition in the Bar2 cluster. In a supersonic expansion of B atoms entrained in Ar, at high beam source backing pressures we observe several features in the fluorescence excitation spectrum which cannot be assigned to the Bar diatom. Using Bar(X,B) potential energy curves which reproduce our experimental observations on this molecule and an Ar–Ar interaction potential, we employ a pairwise additive model, along with variational and diffusion Monte Carlo treatments of the nuclear motion, to determine the lowest vibrational state of the Bar2 cluster. A subsequent simulation of the fluorescence excitation spectrum reproduces nearly quantitatively the strongest feature in our experimental spectrum not assignable to Bar. Because of the barrier in the Bar(B 2Σ+) potential energy curve, the 3s←2p transition in the Bar2 is predicted to have an asymmetric profile, as is found experimentally.

  DOI：

  10.1063/1.473621

文献信息

• Fluorescence excitation and depletion spectroscopy of the BAr complex: Electronic states correlating with the excited valence B(2s2p2 2D) asymptote
  作者：Xin Yang、Paul J. Dagdigian

  DOI：10.1063/1.473649

  日期：1997.4.22

  Laser fluorescence excitation and depletion spectra of the BAr van der Waals complex, in the spectral region around the B atomic 2s2p2 2D←2s22p 2P transition at 208.9 nm, are reported. The fluorescence excitation spectrum displays a series of structured bands, whose excited levels are weakly bound (⩽60 cm−1), and an unstructured continuum to the blue. The onset of the latter allows determination of the ground state dissociation energy D0″=102.4±0.3 cm−1. The fluorescence depletion spectrum reveals, in addition, bands at lower wave numbers to a strongly bound, predissociating state, assigned as C2Δ. The bands observed by fluorescence excitation are assigned to the D2Π, E2Σ+–X2Π transitions. The derived spectroscopic data are used to construct potential energy curves for the C2Δ and D2Π states. The predissociation of the C2Δ state is due to spin–orbit coupling to a repulsive 4Π state correlating with the B(2s2p2 4P)+Ar asymptote, as shown in the accompanying paper [K. Sohlberg and D. R. Yarkony, J. Chem. Phys. 106, 6607 (1997)]. A weak nonradiative decay process is also observed for the D2Π state.