首页> 外文期刊>The journal of physical chemistry, A. Molecules, spectroscopy, kinetics, environment, & general theory >Infrared Spectra of the Novel Si_2H_2 and Si_2H_4 Species and the SiH_(1,2,3) Intermediates in Solid Neon, Argon, and Deuterium
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Infrared Spectra of the Novel Si_2H_2 and Si_2H_4 Species and the SiH_(1,2,3) Intermediates in Solid Neon, Argon, and Deuterium

机译:新型氖气,氩气和氘气中新型Si_2H_2和Si_2H_4物种及SiH_(1,2,3)中间体的红外光谱

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摘要

Laser-ablated silicon atoms react extensively with hydrogen to form the silicon hydrides SiH_(1,2,3,4) and the disilicon hydrides Si_2H_(2,4,6). Infrared spectra and density functional theory frequency calculations with HD and D_2 substitution are used to identify these species in solid neon, argon, and deuterium. The novel dibridged Si_2H_2 species is characterized by an antisymmetric Si-H-Si stretching mode at 1100.3 cm~(-1) and the transfolded Si_2H_4 intermediate by antisymmetric SiH_2 stretching and bending modes at 2151.6 and 858.5 cm~(-1) in solid neon. The SiH_3~- anion is identified by photosensitive absorptions at 1856 and 1837 cm~(-1) in solid neon. Silicon atoms in pure deuterium gave primarily SiD_4 with some SiD_3, Si_2D_6, and Si_2D_4 and no evidence for SiD and SiD_2, but SiD_3~- and SiD_2~- were observed.
机译:激光烧蚀的硅原子与氢充分反应形成氢化硅SiH_(1,2,3,4)和二氢化硅Si_2H_(2,4,6)。用HD和D_2替代的红外光谱和密度泛函理论频率计算来识别固体氖,氩和氘中的这些物质。新型双桥Si_2H_2的特征是在固体氖中以1100.3 cm〜(-1)的反对称Si-H-Si拉伸模式和在2151.6和858.5 cm〜(-1)的反对称SiH_2拉伸和弯曲模式转移的Si_2H_4中间体。通过在固体氖中1856和1837 cm〜(-1)处的光敏吸收来识别SiH_3〜-阴离子。纯氘中的硅原子主要产生SiD_4和一些SiD_3,Si_2D_6和Si_2D_4,但没有SiD和SiD_2的证据,但观察到SiD_3〜-和SiD_2〜-。

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