Вышедшие номера
Phosphorus clusters: Synthesis in the gas-phase and possible cage-like and chain structures
Bulgakov A.V.1, Bobrenok O.F.1, Kosyakov V.I.2, Ozerov I.3, Marine W.3, Heden M.4, Rohmund F.4, Campbell E.E.B.4
1Institute of Thermophysics Siberian Branch of Russian Academy of Sciences, Novosibirsk, Russia
2Institute of Inorganic Chemistry, Novosibirsk, Russia
3Universite de la Mediterrancee, GPEC, UMR CNRS, Marseille, France
4Goteborg University, Chalmers University of Technology, Goteborg, Sweden
Email: bulgakov@itp.nsc.ru
Выставление онлайн: 19 марта 2002 г.

The experimental results on gas-phase formation of neutral and cationic phosphorus clusters are presented. The clusters have been synthesized by visible (532 nm) or UV (193 nm) laser ablation of crystalline red phosphorus under high vacuum conditions and analyzed using TOF mass spectrometry. Neutral Pn 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 P7H3 and P23H5 as wellas cations P23H+6, have been synthesized for the first time. Formation of Pn clusters by thermal vaporization of red phosphorus into a cold He gas has also been investigated, and only the small clusters (n<6) have been discovered. Possible structures of the observed phosporus clusters as well as their formation mechanisms under different conditions are discussed. This work was supported by the Russian Foundation for Basic Research (grant N 99-03-33372), by the Russian Scientific and Technical Program "Fullerenes and Atomic Clusters" (project N 5-4-99), and by the Royal Swedish Academy of Sciences.
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