Pulsed laser photolysis/laser-induced fluores-cence 0LP-LIF) is utilized to measure rate constants for C2(a^3Пu) reactions with NO, N2O, O2, H2 and NH3. Multiphoton dissociation of C2C!4 at 266 nm is employed for the...Pulsed laser photolysis/laser-induced fluores-cence 0LP-LIF) is utilized to measure rate constants for C2(a^3Пu) reactions with NO, N2O, O2, H2 and NH3. Multiphoton dissociation of C2C!4 at 266 nm is employed for the generation of C2(a^3Пu) radicals. The C2(a^3Пu) concentration is monitored by the fluorescence of the (0, 0) band of the (d^3Пg←→a^3Пu) transition at 516.5 nm. C2(a^3Пu) removal rate constants for the reactions are determined as kNO = (5.46 × 0.10) × 10^-11- cm^3 molecule^-1 s^-1, kN2O = (1.63 × 0.20) × 10^-13 cm^3 molecule^-1 s^-1, kN2O = (1.58 × 0.16) × 10^-11 cm^3 molecule^-l s^-1, kO2 = (5.92 × 1.00) × 10^-14 cm^3 molecule^-1 s^-1, kH2 < 1.0× 10^-14 cm^3 molecule^-1 s^-1. Based on the data analysis and theoretical calculation, we suggest that the C2(a^3Пu) reactions with H2 and NH3 proceed via the hydrogen abstraction mechanism, barriers exist at the entrance channel of the reactions of C2(a^3Пu) with H2 and NH3.展开更多
文摘Pulsed laser photolysis/laser-induced fluores-cence 0LP-LIF) is utilized to measure rate constants for C2(a^3Пu) reactions with NO, N2O, O2, H2 and NH3. Multiphoton dissociation of C2C!4 at 266 nm is employed for the generation of C2(a^3Пu) radicals. The C2(a^3Пu) concentration is monitored by the fluorescence of the (0, 0) band of the (d^3Пg←→a^3Пu) transition at 516.5 nm. C2(a^3Пu) removal rate constants for the reactions are determined as kNO = (5.46 × 0.10) × 10^-11- cm^3 molecule^-1 s^-1, kN2O = (1.63 × 0.20) × 10^-13 cm^3 molecule^-1 s^-1, kN2O = (1.58 × 0.16) × 10^-11 cm^3 molecule^-l s^-1, kO2 = (5.92 × 1.00) × 10^-14 cm^3 molecule^-1 s^-1, kH2 < 1.0× 10^-14 cm^3 molecule^-1 s^-1. Based on the data analysis and theoretical calculation, we suggest that the C2(a^3Пu) reactions with H2 and NH3 proceed via the hydrogen abstraction mechanism, barriers exist at the entrance channel of the reactions of C2(a^3Пu) with H2 and NH3.
