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Phosphorus Clusters: Synthesis in the Gas-Phase and Possible Cagelike and Chain Structures

机译：磷团簇：气相中的合成以及可能的笼状和链状结构

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摘要

Experimental results on the gas-phase formation of neutral and cationic phosphorus clusters are presented. The clusters were synthesized by visible (532 nm) or UV (193 nm) laser ablation of crystalline red phosphorus under high vacuum conditions and were analyzed using TOF mass spectrometry. Neutral P_n clusters produced by 532-nm ablation are found to be even-numbered while P_n~+ cations are mainly odd-numbered, with P_7~+ and P_(21)~+ being the most abundant ions. For UV laser ablation, stable compound clusters, neutral P_7H_3 and P_(23)H_5, and cations P_(23)H_6~+ were synthesized for the first time. The formation of P_n clusters by thermal vaporization of red phosphorus into a cold He gas was also investigated and only small clusters (n < 6) were found. Possible structures of the observed phosphorus clusters, as well as their formation mechanisms under different conditions, are discussed.
机译：给出了中性和阳离子磷团簇气相形成的实验结果。在高真空条件下通过可见（532 nm）或紫外（193 nm）激光烧蚀结晶红磷合成团簇，并使用TOF质谱分析。发现通过532 nm烧蚀产生的中性P_n簇为偶数，而P_n〜+阳离子主要为奇数，其中P_7〜+和P_（21）〜+是最丰富的离子。对于UV激光烧蚀，首次合成了稳定的化合物簇，中性P_7H_3和P_（23）H_5，以及阳离子P_（23）H_6〜+。还研究了通过红磷热蒸发成冷氦气而形成的P_n团簇，仅发现了小团簇（n <6）。讨论了观察到的磷团簇的可能结构及其在不同条件下的形成机理。

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