激光产生的硼磷簇离子结构的质谱研究

Mass Spectrometry of B-n~±, P-n~± and B_nP-m~± Generated by Laser Ablation

在高真空中以脉冲激光束溅射单质硼，磷及其混合物，产生了非常丰富的Ｂｎ＾±，Ｐｎ＾±与ＢｎＰｍ＾±。对飞行时间质谱的分析发现：实验产生的硼原子簇离子基本上为同一构型，可能为密堆积的结构；磷原子簇的基本结构单元为Ｐ８；磷与硼磷簇离子中可能存在平面环的类芳香稳定结构；所有这些簇离子均有使其所有价电子成对的强烈倾向。

By Laser ablating the pure boron and phosphorus powders and their mixture, abundent Bn±, Pn±and BnPm±cluster ions have been produced and recorded subsequently by the time-of-flight mass spectrometers. It is found that almost all Bn± observed in this experiment have a similar structure, which is believed to be the close packed structure. The magic number for Pn±is 8, which is one of their structural units. It is possible that some Pn±, as well as some BnPm± cluster ions, may have a ring structure. All Pn±, Bn± and BnPm± cluster ions have a strong tendency to have their electrons paired.