Kinetics Studies on Quenching of CCl2CA1B1 and a3B1 by O2, CF4 CF2Cl2,CH3NO2,CH2Br2 and Chloromethane

Abstract

Abstract: CCl₂ free radicals were produced by dc discharge of CCl₄(in Ar).Ground electronic state CCl₂ radical was electronically excited to A¹B₁(0,4.0) state k=0 level with Nd YAGlaser pumped dye laser at 541.52 nm.Experimental quenching data of CCl₂(A¹B₁ and a³B₁) by O₂, CF₄, CF₂Cl₂, CH₃NO₂, CH₂Br₂ and chloromethane were obtained by observing time resolved fluorescence from the excited CCl₂ radicals transition, which showed a superposition of two exponential decay components.The state-resolved rate constants K_A and K_a were acquired by analyzing and dealing with these data by using a three-level-model.

Key words: CCl₂(A¹B₁, a³B₁), Kinetics, Quenching rate constant, Substituted methane

CLC Number:

O643.2

TrendMD:

GAO Yi-De, HU Chang-Jin, CHEN Yang, DAI Jing-Hua, CHEN Cong-Xiang. Kinetics Studies on Quenching of CCl₂CA¹B₁ and a³B₁ by O₂, CF₄ CF₂Cl₂,CH₃NO₂,CH₂Br₂ and Chloromethane[J]. Chem. J. Chinese Universities, 2002, 23(5): 906.

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Kinetics Studies on Quenching of CCl₂CA¹B₁ and a³B₁ by O₂, CF₄ CF₂Cl₂,CH₃NO₂,CH₂Br₂ and Chloromethane

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