Free Radicals in the Condensed Phase

建立了一种差频红外激光系统，用于凝聚态自由基的高分辨率光谱研究。该激光器覆盖900-10,000 cm^<-1>的光谱区域，用于固体对氢掺杂甲烷及其氘化同位素体的高分辨率红外光谱分析。详细研究了简并弯曲模态和简并拉伸模态。将研究扩展到甲基、乙基和其他自由基，这些自由基是由CH_3I、CD_3I、C_2H_5I和其他母体分子在紫外光解作用下产生的。此外，通过激光汽化石墨得到的碳团簇被捕获在固体对氢中，以获得C_3， C_5， C_9和其他团簇的光谱信息（Shida, Momose）。利用二维离子成像仪研究了乙炔在A态的预解离及其光碎片的定向排列。对实验结果进行了理论分析（Suzuki）。利用自制的电子能量仪（Shiromaru）研究了碳簇阴离子与表面碰撞时电子脱离的动力学过程。研究了氯分子与csomo改性硅（100）表面的碰撞，获得了附着概率等与表面电位（纳米）有关的信息。研究了半导体材料微颗粒表面的氧化还原过程，阐明了颗粒尺寸与氧化还原电位之间的关系（Nosaka）。

A difference-frequency infrared laser system was constructed for high-resolution spectroscopic study of free radicals in the condensed phase. The laser, which covered the spectral region of 900-10,000 cm^<-1>, was employed for high-resolution infrared spectroscopy of methane and its deuteriated isotopomers doped in solid parahydrogen. The degenerate bending and stretching modes were studied in detail. The study was extended to methyl, ethyl, and other radicals produced on UV photolysis of CH_3I,CD_3I,C_2H_5I,and other parent molecules. Furthermore, carbon clusters obtained by laser vaporization of graphite were trapped in solid parahydrogen to obtain spectroscopic information on C_3, C_5, C_9, and other clusters (Shida, Momose).Predissociation of acetylene in the A state and the directional alignment of photofragments therefrom were studied by using a two-dimensional ion imaging apparatus. The experimental results were analyzed theoretically (Suzuki).Dynamics of electron detachment from carbon cluster anions upon collision with surfaces was studied by using a home-built electron energy analyzer (Shiromaru)Collision of chlorine molecules with CsOmodified silicon (100) surface was studied to obtain attachment probability and other information concernong to the surface potential (Namiki).Redox processes on the surface of micro particles of semiconducting materials were studied to clarify the relation between the particle size and the redox potential (Nosaka).