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MX二组分离子型团簇的理论和实验研究近年来都十分活跃,这是因为研究它们的形成、增长、反应和结构,对于从分子层次上认识晶体的生长、结晶等过程都十分重要我们用激光烧蚀K_3[Fe(CN)_6]固体的方法,首次产生了三组分离子化合物KCN团簇的正负离子,用TOF质谱研究了团簇离子的分布,并根据“幻数”(magic number)出现的规律提出了它们可能的结构。 实验是在自行研制的激光烧蚀-脉冲飞行时间质谱仪上进行的。能量为5～30 mJ的532 nm激光,经f=50 mm的透镜聚焦后垂直照射到K_3[Fe(CN)_6]固体靶上。激光照射固
The theoretical and experimental studies of MX two-component ionic clusters have been very active in recent years because the study of their formation, growth, reaction and structure are very important for recognizing the crystal growth, crystallization and other processes at the molecular level. Using laser ablation of K_3 [Fe (CN) _6] solid, three groups of positive and negative ions of KCN cluster were generated for the first time. The distribution of cluster ions was studied by TOF mass spectrometry. According to “magic number” The law of occurrence suggests their possible structure. Experiments were performed on a self-developed laser ablation-pulse time-of-flight mass spectrometer. The 532 nm laser with energy of 5 ~ 30 mJ was focused on the K_3 [Fe (CN) _6] solid target by focusing on a lens of f = 50 mm. Laser irradiation solid