活性氮与SO_2和SOCl_2的传能反应

Reaction of Active Nitrogen with SO_2 and SOCl_2

在流动余辉装置上,研究了活性氮与SO2和SOCl2之间的反应过程.在280～500nm,观察到了SO2(A"1A2,#B1B1$#X1A1)和SO2(%a3B1$#X1A1)的发射光谱.对比由Ar(3P0,2)与N2碰撞反应产生的纯N2(A3∑u+)与SO2、SOCl2之间反应的实验结果,可以说明,N2(A3∑u+)在活性氮与SO2的反应中是主要的能量载体,它与SO2的直接能量转移反应形成了激发态的SO2(#A1A2,B#1B1);在活性氮与SOCl2的反应中观测到的激发态SO2(%a3B1),则可能主要是通过N(4S)与SOCl2反应生成的N2O(X1∑+)和N2(A3∑u+)与SOCl2反应生成的SO(X3∑-)之间的化学反应过程产生.

The reactions of active nitrogen with SO2 and SOCl2 have been studied on a flowing afterglow apparatus. The emissions ranging from 280 to 500 nm were assigned to SO2（~A^1A2,~B^1B1→~X^1A） and SO2（~a^3B1→~X^1A1）. With the aim to discerning the roles of active N atom and N2（A^3∑u^＋） played in the reactions above, N2（A^3∑u^＋） generated by Ar（^3P0.2） reacting with N2 has substituted the active nitrogen to react with SO2 and SOCl2, respectively. It shows that when reacting with SO2, both the active nitrogen and N2（A^3∑u^＋） without N atom can produce SO2（~A^1A2,~B^1B1） and SO2（~a^3B1）; while reacting with SOCl2, only when N2（A^3∑u^＋） and the active N atoms coexist, could SO2（~a^3B1） be formed. Therefore, it is concluded that N2（A^3∑u^＋） dominates the reaction of active nitrogen with SO2 and makes SO2 excited directly; N2（A^3∑u^＋） and active N atom reacting with SOCl2 can generate the constitutions to form SO（X^3∑^-）, which were suggested as SO（X^3∑^-） and SO（X）.