| Kinetics of C_2(a~3Π_u)radical reactions with NO,N_2O,O_2,H_2 and NH_3 |
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| 作者姓名： | HUANG Cunshun LI Zongxiao ZHAO Dongfeng XIN Yao PEI Linsen CHEN Congxiang & CHEN Yang
Key Laboratory of Bond Selective Chemistry Chinese Academy of Sciences |
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| 作者单位： | HUANG Cunshun，LI Zongxiao，ZHAO Dongfeng，XIN Yao，PEI Linsen，CHEN Congxiang & CHEN Yang
Key Laboratory of Bond Selective Chemistry，Chinese Academy of Sciences，Department of Chemical Physics，University of Science and Technology of China，Hefei 230026，China;
Department of Chemistry，Baoji College of Arts and Science，Baoji 721007，China |
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| 摘 要： | Pulsed laser photolysis/laser-induced fluorescence (LP-LIF) is utilized to measure rate constants for C_2(a~3(multiply from)_u) reactions with NO, N_2O, O_2, H_2 and NH_3. Multiphoton dissociation of C_2CI_4 at 266 nm is employed for the generation of C_2(a~3(multiply from)_u) radicals. The C_2(a~3(multiply from)_u) concentration is monitored by the fluorescence of the (0, 0) band of the (d~3(multiply from)_g←→a~3(multiply from)_u) transition at 516.5 nm. C_2(a~3(multiply from)_u) removal rate constants for the reactions are determined as k_(NO)=(5.46±0.10)×10~(-11)cm~3molecule~(-1)s~(-1), k_(N_2O)=(1.63±0.20)×10~(-13)cm~3molecule~(-1)s~(-1), k_(N_2O)=(1.58±0.16)×10~(-11)cm~3molecule~(-1)s~(-1), k_(O_2)=(5.92±1.00)×10~(-14)cm~3molecule~(-1)s~(-1), k_(H_2)<1.0×10~(-14)cm~3molecule~(-1)s~(-1). Based on the data analysis and theoretical calculation, we suggest that the C_2(a~3(multiply from)_u) reactions with H_2 and NH_3 proceed via the hydrogen abstraction mechanism, barriers exist at the entr
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| 关 键 词： | C2(a3Πu) radical laser-induced fluorescence rate constant. |
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