Vaden Timothy D, Lisy James M, Carnegie Prosser D, Pillai E Dinesh, Duncan Michael A
Department of Chemistry, University of Illinois, 600 South Mathews Avenue, Urbana, IL 61801, USA.
Phys Chem Chem Phys. 2006 Jul 14;8(26):3078-82. doi: 10.1039/b605442k. Epub 2006 Jun 1.
The internal energy or effective temperature of cluster ions has become an important issue in characterizing the structures observed in these species. This report considers the role played by the method of ion preparation (laser vaporization-supersonic expansion versus ion impact-evaporative cooling) in governing the internal energy of a specific species, Li(+)(H(2)O)Ar. Vibrational predissociation spectroscopy of the O-H stretch modes revealed rotational features, which were used to characterize the structure and effective rotational temperature of the cluster ion. In addition, the impact of the lithium ion on the H(2)O molecule was analyzed in terms of the vibrational frequency shifts, relative IR intensities, and H(2)O geometry.
团簇离子的内能或有效温度已成为表征这些物种中所观察到结构的一个重要问题。本报告考虑了离子制备方法（激光蒸发 - 超声速膨胀与离子碰撞 - 蒸发冷却）在控制特定物种Li(+)(H₂O)Ar的内能方面所起的作用。O - H伸缩振动模式的振动预解离光谱揭示了转动特征，这些特征被用于表征团簇离子的结构和有效转动温度。此外，从振动频率位移、相对红外强度和H₂O几何结构方面分析了锂离子对H₂O分子的影响。
