Acta Phys. -Chim. Sin. ›› 2005, Vol. 21 ›› Issue (11): 1195-1197.doi: 10.3866/PKU.WHXB20051101

• Communication •     Next Articles

Studies on the Quenching of SO (c1Σ,v=0)

WANG Hong-mei; TANG Xiao-shuan; CHU Yan-nan; ZHOU Shi-kang   

  1. Laboratory of Environmental Spectroscopy; Key Laboratory of Environmental Optics & Technology, Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei 230031
  • Received:2005-08-18 Revised:2005-09-23 Published:2005-11-15
  • Contact: WANG Hong-mei

Abstract: On a flowing afterglow apparatus, the quenching of SO(c1Σ) by SO2, O2, CO2, N2, He, CS2, CH3OH, C2H5OH, C3H7OH, C4H9OH, CH3COCH3, C6H6, CH2Cl2, CH2Br2, CHCl3, or CCl4 was studied firstly and successfully. The quenching rate constants of SO(c1Σ) by them were measured. By analysis, it demonstrates that the quenching rate constants of SO(c1Σ) by the alkanol molecules, CnH2n+1OH(n=1, 2, 3, 4), are semi-proportional to the number of C—H bond in them; the quenching by the non-polar small molecules, such as CO2 and N2 is not efficient; while it is obvious by SO2 because of its strong polarity. The size and volume of halogen atoms in the halomethane molecules play an important role in quenching SO(c1Σ), and it seems that there is no evident correlation between the quenching rate constants and the number of the chlorine atom in the chlomethane molecules.

Key words: SO(c1Σ), Quenching rate constant, Alkanol molecules, Collisional complex, Dynamics