Acta Phys. -Chim. Sin. ›› 2001, Vol. 17 ›› Issue (10): 944-947.doi: 10.3866/PKU.WHXB20011016

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Measurements of Quenching Rate Constants of CCl2(A 1B1 and a 3B 1) by Some Inorganic Molecules

Gao Yi-De;Liu Yun-Zhen;Ran Qin;Chen Cong-Xiang   

  1. Open Laboratory of Bond Selective Chemistry,Department of Chemical physics,University of Science and Technology of China ,Hefei 230026
  • Received:2001-03-20 Revised:2001-06-06 Published:2001-10-15
  • Contact: Chen Cong-Xiang

Abstract: CCl2 free radicals were produced by dc discharge of CCl4(in Ar). Ground electronic state CCl2 radical was electronically excited to A 1B1 (0,4,0) state with Nd:YAG laser pumped dye laser at 541.52 nm. Experimental quenching data of CCl2 (A 1B1 and a 3B1) by O2,N2,NO,CO2,CS2,H2O,SO2 and SF6 were obtained by observing time resolved fluorescence from the excited CCl2 radicals,which showed a superposition of two exponential decay components. The stateresolved rate constants kA and ka were first time acquired by analyzing and dealing with these data by using a threelevelmodel proposed by us.

Key words: CCl2(A 1B1a 3B 1), Kinetics, Quenching rate constant, Three-level model