化学学报 ›› 1997, Vol. 55 ›› Issue (12): 1191-1197. 上一篇    下一篇

研究论文

碳氮二元簇离子的激光产生与碰撞诱导解离研究

唐紫超;石磊;黄荣彬;郑兰荪   

  1. 厦门大学化学系
  • 出版日期:1997-12-15 发布日期:1997-12-15

Collision induced dissociation of carbon-nitrogen cluster ions produced from laser ablation

TANG ZICHAO;SHI LEI;HUANG RONGBIN;ZHENG LANSUN   

  • Online:1997-12-15 Published:1997-12-15

以脉冲激光束在高真空中溅射铁氰化钾,产生了各种组成的碳氮原子簇负离子,记录了它们的飞行时间质谱。根据这些簇离子的碰撞诱导解离研究结果,推测了它们的结构,发现它们大都具有超共轭的稳定体系,它们的构型随成簇氮原子数的增加,从一维直链向二维芳环转化。

关键词: 簇状化合物, 碳原子, 铁氰化钾, 构型, 溅射, 氮原子, 激光脉冲, 飞行时间质谱法, 结构表征, 碰撞诱导解离

Various binary cluster anions consisted of carbon and nitrogen elements were produced on a self-built apparatus by laser ablation of K~3[Fe(CN)~6]. The mass distribution was recorded by a time-of- flight mass spectrometer. The mass-selected cluster ions dissociated in colliding with a nitrogen beam and the fragment ions were mass analyzed by the secondary mass spectrometer. Based on the analysis of the experimental results, two major structural styles of the binary cluster ions, linear chain and planar ring, were suggested. The cluster ions composed of single nitrogen atom is linear, and those consisted of more than two nitrogen atoms are mostly in ring structure. Most recorded cluster ions are highly conjugated and without dangling bond.

Key words: CLUSTER COMPOUND, CARBON ATOM, POTASSIUM FERRICYANIDE, CONFIGURATION, SPUTTERING, NITROGEN ATOM, LASER PULSE, TIME-OFF FLIGHT MASS SPECTROMETRY, STRUCTURE CHARACTERISTICS, CONJUGATIVE EFFECT

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