活性氮与SO2和SOCl2的传能反应

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280～500 nm, 观察到了SO2( A1A2,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(A3Σu+)与SO2、SOCl2之间反应的实验结果, 可以说明, N2(A3Σu+)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, B1B1); 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(X1Σ+)和N2(A3Σu+)与SOCl2反应生成的SO(X3Σ－)之间的化学反应过程产生.

Reaction of Active Nitrogen with SO2 and SOCl2

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 (~A2, 1B1→1A1) and SO2(3B1→1A1). With the aim to discerning the roles of active N atom and N2(A3Σ+u) played in the reactions above, N2(A3Σ+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(A3Σ+u) without N atom can produce SO2 (~A2, 1B1) and SO2 (3B1); while reacting with SOCl2, only when N2(A3Σ+u) and the active N atoms coexist, could SO2 (3B1) be formed. Therefore, it is concluded that N2 (A3Σ+u) dominates the reaction of active nitrogen with SO2 and makes SO2 excited directly; N2 (A3Σ+u)and active N atom reacting with SOCl2 can generate the constitutions to form SO2 (3B1), which were suggested as N2O(X1Σ+) and SO(X).