Acta Phys. -Chim. Sin. ›› 1993, Vol. 9 ›› Issue (03): 398-401.doi: 10.3866/PKU.WHXB19930320

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The Measurements of Quenching rate Constants of CH(A2Δ) by O2, CYCLO-C6H12 and CS2

Chen Cong-Xiang; Wang Xue-Jun; Ma Xing-Xiao   

  1. Department of Modern Chemistry, University of Science and Technology of China, Hefei 230026
  • Received:1991-10-15 Revised:1992-03-31 Published:1993-06-15
  • Contact: Chen Cong-Xiang

Abstract: We present the measurements of quenching rate constants of CH(A~2△) radical by O_2, cyclo-C_6H_(12) and CS_2 molecules. The time-resolved spectra of emission CH(A~2△-X~2Π) was monitored. The measured quenching rate constants are as follows.
k_q(O_2)=(2.8±0.5)×10~(-11) cm~3·molec~(-1)·s~(-1)
k_q(cyclo-C_6H_(12))=(2.7±0.4)×10~(-10) cm~3·molec~(-1)·s~(-1)
k_q(CS_2)=(4.0±0.6)×10~(-10) cm~3·molec~(-1)·s~(-1)
The value of k_q(O_2) is in good agreement with previous works. The rate constants for quenching by cyclo-C_6H_(12) and CS_2 are reported for the first time.

Key words: Kinetics, Quenching, CH(A2Δ)