准经典轨线法研究交换反应H(D)+SH/SD的动力学性质  

A study of dynamic properties of exchange reaction H(D) + SH/SD by quasi-classical trajectory method

作　　者：徐国亮[1] 刘培[1] 刘彦磊[1] 张琳[1] 刘玉芳[1] 

机构地区：[1]河南师范大学物理与电子工程学院,新乡453007

出　　处：《物理学报》2013年第22期149-158,共10页Acta Physica Sinica

基　　金：国家自然科学基金(批准号:11274095);河南省基础与前沿技术研究计划(批准号:122300410109);河南省教育厅基础研究计划(批准号:13A140550);河南师范大学国家级科研项目培育基金(批准号:2010PL02);河南省高等学校科技创新团队支持计划(批准号:13IRTSTHN016)资助的课题~~

摘　　要：硫在氢气中的燃烧反应在气象化学、燃烧反应和大气污染中都扮演着重要的角色,近年来一直受到广泛关注,其逆反应也渐渐成为人们的研究对象.以Lu¨等得到的精确势能面(Lu¨S J,Zhang P Y,Han K L,He G Z 2012 J.Chem.Phys.136 94308)为基础,用准经典轨线法对交换反应H(D)+SH/SD的动力学性质进行了研究.计算了包括反应截面、速率常数、不透明函数、产物振动和转动分布等在内的标量性质和包括产物散射方向、转动角动量定向和取向性质在内的矢量性质.详细分析了碰撞能量和同位素效应对反应H(D)+SH/SD的动力学性质的影响.结果表明,随着碰撞能量的增加,反应截面逐渐增大,产物的后向散射逐渐减弱,产物转动角动量的取向和定向性质逐渐增强;另外,同位素效应对反应的动力学性质也有明显的影响.以反应动力学性质和势能面为基础,详细讨论了反应H(D)+SH/SD的反应机制.Sulfur in hydrogen combustion reaction chemistry, which plays an important role in meteorology, combustion reactions, and atmospheric pollution, has been extensively investigated recently. And its reverse reaction has also been a research object gradually. The research in this paper is based on the exact potential energy surface （Lü S J, Zhang P Y, Han K L, He G Z 2012 J. Chem. Phys. 136 094308）, with using the method of quasi-classical trajectory on the exchange reaction of H （D）＋SH/SD dynamic properties. In this paper, the scalar properties are calculated, including the cross section, rate constant, opacity function, product vibrational, rotational distributions, product scattering direction, rotational angular momentum orientation, and alignment properties. In this paper, how the collision energy and the isotope affect the reaction H （D）＋SH/SD kinetic properties is analyzed in detail. The results show that as collision energy increases, the reaction cross section increases, product backscatter weakens gradually while the product rotational angular momentum alignment and orientation nature strengthen gradually. In addition, the isotope effect has a significant influence on the reaction kinetics. The reaction mechanism which is shown in the title and based on the reaction kinetics and the potential energy surface, is also discussed in this paper.

关 键 词：准经典轨线 反应截面 速率常数 振动-转动分布 

分 类 号：O643.12[理学—物理化学]