Reactions of silanes with halogens: chemiluminescent products in the ultraviolet-visible spectrum
Reactions of silanes with halogens: chemiluminescent products in the ultraviolet-visible spectrum
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硅烷与卤素的反应：紫外-可见光谱中的化学发光产物
DOI：
10.1021/ja00450a022
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发表时间：
1977
影响因子：
15
通讯作者：
J. Gole
中科院分区：
文献类型：
--
作者：
C. P. Conner;G. Stewart;D. M. Lindsay;J. Gole
The reactions of monosilane (SÍH4) and disilane (SijHe) with CI2, F2, and C1F have been studied. The monosilane-fluorine and disilane-fluorine systems are characterized by strong emission from the (2+)-(2) transition of SiF, the A (2A])-X (2Ai) transition of S1F3, and the (2)-(2) transition of SiH. Some evidence indicates the possible observation of the (4)-(2) transition in SiH. By contrast, the principal emission spectrum in the monosilane-chlorine and disilane-chlorine reactions is the"-1 A'transition of HSiCl. A continuum emission feature may belong to S1CI2 or SiCI3. These re-sults indicate specific reaction mechanisms which include both atomic and molecular halogen reacting with intermediate sil-ylene (S1H2) radicals and silicon atoms.Many organic and inorganic hydrides react with halogens to give vibrationally excitedhydrogen halides as products. Consequently, these systems have received attention as po-tential sources for infrared chemical lasers. 2 However, inor-ganic oxidation reactions are often highly exothermic and, as a result, produce a rich variety of electronically excited inter-mediates. 3 This suggests the study of gas-on-gas reactions, as an alternative to the presently favored metal-gas reactions, 4 as candidates for a visible chemical laser. The complex nature of flame reactions enhances thepossi-bility of observing new spectroscopic transitions. 5 In some cases, by identifying reaction intermediates from previously reported spectra, individual kinetic steps may be inferred. Alternatively, these reactions could be used to give a high flux of radicals, which are otherwise difficult to prepare in sufficient concentration, for subsequent kinetic and/or spectroscopic studies.
