摘要
SO_2与烷烃在337nmN_2分子激光辐照下生成光化学烟雾。实验测量了烟雾的平均颗粒大小,烟雾的稳定散射光强度与N_2分子激光功率、烷烃的C—H键键能以及温度的关系,得到反应表观活化能为—16kcal/mole。结果表明光化反应的第一步是H原子提取反应,光化学烟雾是依靠van der Waals力将分子集合在一起的。
When 337nm N_2 laser irradiates SO_2 and alkane, photochemical aerosols are formed. In this paper the average particle sizes of aerosols are measured. The relations of scattering light intensity to laser intensity, C—H bonding energy and temperature are examined. The experiment results indicate that the initial step of this photochemical reaction is an H abstraction from RH by excited SO_2 and that intermolecular actions of aerosols depend on van der waals force.
关键词
二氧化硫
烷烃
光化学
烟雾
SO_2, alkane, photochemistry, aerosol.
