Internal Energy Distributions of OH Products in the Reaction of O(3PJ) with HSiCl3

Bulletin of the Korean chemical society

Sungwoo Jang¹  Chan Ryang Park¹  Hong Lae Kim¹  Seung Chul Ha¹  Hyon Tae Kwak¹ 

关键词: Trichlorosilane;    O(3PJ);    LIF;    OH;    Internal energy distribution;   

DOI  :  

学科分类：化学（综合）

来源: Korean Chemical Society

【 摘 要 】

The OH(X²�?, �?"=0, 1) internal state distributions from the reaction of electronically ground state oxygen atoms with HSiCl3 were measured using laser-induced fluorescence. The ground-state O(³P_J) atoms with kinetic energies above the reaction barrier were produced by photolysis of NO₂ at 355 nm. The OH product revealed strong vibrational population inversion, P(�?"=1)/P(�?"=0) = 4.0 �? 0.6, and rotational distributions in both vibrational states exhibit substantial rotational excitations to the limit of total available energy. However, no preferential populations in either of the two �? doublet states were observed from the micropopulations, which supports a mechanism involving a direct abstraction of hydrogen by the atomic oxygen. It was also found that the collision energy between O and HSiCl₃ is effectively coupled into the excitation of the internal degrees of freedom of the OH product (<f_vib> = 0.62, and <f_rot> = 0.20). The dynamics appear consistent with expectations for the kinematically constrained reaction which supports the reaction type, heavy + light-heavy �? heavy-light + heavy (H + LH�? �? HL + H�?). The dynamics of oxygen atom collision with HSiCl₃ are discussed in comparison to those with SiH4.

【 授权许可】

Unknown