含ⅢA或VA族杂原子的碳原子簇负离子的研究

Studies of Carbon Cluster Anions with a Heteroatom of ⅢA or VA Group

在自制的仪器上，以脉冲激光束在高真空中溅射适当的样品，产生了一系列合有1个VA族原子（N、P、As）或ⅢA族原子（B、Al）及13个以下碳原子的原子簇负离子。在实验记录的飞行时间质谱中，这些簇离子的信号强度均因其碳原子数的奇偶而发生交替变化．对实验结果的分析研究显示：这些簇离子均为直链构型．VA或ⅢA族原子位于链的一端，所有成簇原子的价键均得到满足．

A series of carbon cluster anions with a heteroatom have been generated on a home-made apparatus by laser abalation of appropriate samples. The heteroatom includes boron, aluminum,nitrogen,phosphorus or arsenic which is either a ⅢA or a VA group element. The recorded time-of-flight mass spectra show that stabilities of the cluster anions are affected by the composition of the heteroatom. The ⅢA group heteroatom tends to bind with even sizes of carbon atom and the VA group atom selects odd sizes.The even/odd alternation is attributed to the linear configuration of the cluster anions with the heteroatom at the end of the chain.