首页> 外文期刊>The Journal of Chemical Physics >INFRARED SPECTRA OF THE REACTION PRODUCTS OF LASER ABLATED LEAD ATOMS AND OXYGEN MOLECULES IN CONDENSING ARGON AND NITROGEN
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INFRARED SPECTRA OF THE REACTION PRODUCTS OF LASER ABLATED LEAD ATOMS AND OXYGEN MOLECULES IN CONDENSING ARGON AND NITROGEN

机译:激光烧蚀的铅原子和氮分子在冷凝氩和氮中的反应产物的红外光谱

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摘要

Reactions of laser ablated lead atoms with oxygen molecules in condensing argon and nitrogen streams gave the PbO, OPbO, Pb(O-2), OPb(O-2), PbOPb, Pb2O2, PbPb(O-2), and Pb4O4 molecules. The formation of lead monoxide and Linear dioxide molecules is the main difference with thermal evaporation experiments. The linear OPbO isomer was identified from oxygen-18 and lead (natural abundance) isotopic substitution in the strong antisymmetric stretching absorption at 764.8 cm(-1); a weak v(1) + nu(3) combination band was observed at 1423.4 cm(-1). Two bands [nu(1) -728.7 cm(-1) (Ar) and 730.6 cm(-1) (N-2) and nu(2)=437.3 cm(-1) (Ar) and 449.6 cm(-1) (N-2)] are assigned to the cyclic isomer Pb(O-2) based on oxygen isotopic substitution. The position of the O-O stretching fundamental shows that Pb(O-2) is a peroxidelike molecule. The secondary reaction Pb(O-2)+Pb gives a large yield of cyclic Pb2O2 and allows observation of very strong antisymmetric Pb-O stretching fundamentals and combination bands with the two symmetric stretching fundamentals. Density functional frequency calculations with effective core potentials support assignment of the observed infrared absorptions. (C) 1996 American Institute of Physics [References: 41]
机译:在冷凝的氩气和氮气流中,激光烧蚀的铅原子与氧分子的反应产生了PbO,OPbO,Pb(O-2),OPb(O-2),PbOPb,Pb2O2,PbPb(O-2)和Pb4O4分子。一氧化铅和线性二氧化铅分子的形成是热蒸发实验的主要区别。从氧18和铅(自然丰度)同位素取代中,在764.8 cm(-1)的强抗对称拉伸吸收中鉴定出线性OPbO异构体;在1423.4 cm(-1)处观察到弱的v(1)+ nu(3)组合带。两个波段[nu(1)-728.7 cm(-1)(Ar)和730.6 cm(-1)(N-2)和nu(2)= 437.3 cm(-1)(Ar)和449.6 cm(-1 )(N-2)]基于氧同位素取代被分配给环状异构体Pb(O-2)。 O-O拉伸基本原理的位置表明Pb(O-2)是一种过氧化物样分子。次级反应Pb(O-2)+ Pb产生的环状Pb2O2的产率很高,可以观察到非常强的抗对称Pb-O拉伸基本原理以及具有两个对称拉伸基本原理的组合谱带。具有有效磁芯电势的密度函数频率计算可支持观察到的红外吸收的分配。 (C)1996年美国物理研究所[参考文献:41]

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