Li Gang, Wang Chong, Li Qinming, Zheng Huijun, Wang Tiantong, Yu Yong, Su Mingzhi, Yang Dong, Shi Lei, Yang Jiayue, He Zhigang, Xie Hua, Fan Hongjun, Zhang Weiqing, Dai Dongxu, Wu Guorong, Yang Xueming, Jiang Ling
State Key Laboratory of Molecular Reaction Dynamics, Collaborative Innovation Center of Chemistry for Energy and Materials, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian 116023, China.
Rev Sci Instrum. 2020 Mar 1;91(3):034103. doi: 10.1063/1.5141897.
This paper describes an experimental technique for studying neutral metal complexes using infrared + vacuum ultraviolet (IR+VUV) two-color ionization spectroscopy based on a tunable VUV free-electron laser (VUV-FEL). The preliminary IR spectroscopy results of mass-selected nickel tetracarbonyl are reported in this work. The results demonstrate that the tunable VUV-FEL light allows the selective ionization of a given neutral cluster free of confinement along with the recording of well-resolved IR spectra. As the ionization energies of many neutral clusters are accessible by a broadly tunable VUV-FEL (50-150 nm) and near-threshold ionization can be readily achieved, the proposed experimental method offers unique possibilities for the size-specific study of a wide variety of confinement-free neutral clusters.
本文描述了一种基于可调谐真空紫外自由电子激光（VUV-FEL），利用红外+真空紫外（IR+VUV）双色电离光谱研究中性金属配合物的实验技术。本文报道了质量选择的四羰基镍的初步红外光谱结果。结果表明，可调谐VUV-FEL光能够对给定的无限制中性团簇进行选择性电离，同时记录分辨率良好的红外光谱。由于许多中性团簇的电离能可通过宽可调谐的VUV-FEL（50-150nm）获得，并且可以很容易地实现近阈值电离，因此所提出的实验方法为各种无限制中性团簇的尺寸特异性研究提供了独特的可能性。
