ATMOSPHERIC REACTIONS OF THE HO2 RADICAL STUDIED BY LASER MAGNETIC-RESONANCE SPECTROSCOPY
ATMOSPHERIC REACTIONS OF THE HO2 RADICAL STUDIED BY LASER MAGNETIC-RESONANCE SPECTROSCOPY
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DOI：
10.1098/rspa.1979.0141
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发表时间：
1979-01-01
期刊：
影响因子：
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通讯作者：
WILKINSON, JPT
中科院分区：
文献类型：
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作者：
BURROWS, JP;CLIFF, DI;WILKINSON, JPT
用激光磁共振技术测量了H02和HO的转动光谱，并用于确定在低压和室温下H02在快流体系中反应的速率系数。对大气重要过程进行了研究，得出的速率系数为：k4 =（3.1 ± 1.0）× 10 − 11cm3分子− 1s − 1，（4）HO + HO2 = H2O + O2，k8 =（5.1 ± 1.7）× 10 − 11cm3分子− 1s − 1，（8）NO + HO 2 = NO 2 + HO，k2 =（8.2 ± 2.4）× 10 − 12cm3分子− 1s − 1，（2）HO2 + Cl = HCl + O2，k17 =（4.1 ± 1.4）× 10 − 11cm 3 molecule − 1s − 1，（17）HO 2 + Cl = HO + ClO，k17 a ≤ 3 × 10 − 13cm 3 molecule − 1s − 1，（17 a）HO 2 + SO 2 = HO + SO 3，k21 ≤ 2 × 10 − 17cm3 molecule − 1s − 1，（21）HO 2 + SO 2 + He = HO 2 SO 2 + He，k21 a ≤ 4 × 10 − 34cm6 molecule − 1s − 1，（21 a）HO 2 + CO = HO + CO 2，k22 ≤ 2 × 10 − 17cm 3 molecule − 1s − 1，（22 a）HO 2 + CO + He = HCO 3 + He，k22 a ≤ 4 × 10 − 34cm 6 molecule − 2s − 1。两个H02自由基的反质子化被示出在氩载体中在约2托的总压力下比在更高的总压力下报道的进行得更慢。K19的上限为HO2 + HO2 = H2O2 + O2，其范围为（7.5 ± 5.0）× 10 - 13cm-3 molecule-1s-1。
Measurement of the rotational spectra of H02and HO by laser magnetic resonance has been used to determine rate coefficients for reactions of H02in a fast flow system at low pressures and ambient temperatures. Processes of atmospheric importance were studied and the rate coefficients obtained were:k4=(3.1±1.0)×10−11cm3molecule−1s−1, (4) HO+HO2=H2O+O2,k8=(5.1±1.7)×10−11cm3molecule−1s−1, (8) NO+HO2=NO2+HO,k2=(8.2±2.4)×10−12cm3molecule−1s−1, (2) HO2+Cl=HCl+O2,k17=(4.1±1.4)×10−11cm3molecule−1s−1, (17) HO2+Cl=HO+ClO,k17a≤3×10−13cm3molecule−1s−1, (17a) HO2+SO2=HO+SO3,k21≤2×10−17cm3molecule−1s−1, (21) HO2+SO2+He=HO2SO2+He,k21a≤4×10−34cm6molecule−1s−1, (21a) HO2+CO=HO+CO2,k22≤2×10−17cm3molecule−1s−1, (22a) HO2+CO+He=HCO3+He,k22a≤4×10−34cm6molecule−2s−1.. The disproportionation of two H02radicals was shown to proceed more slowly in argon carriers at total pressures around 2 Torr than had been reported at higher total pressures. Upper limits for k19 were HO2+HO2= H2O2+O2found to lie in the range (7.5 ± 5.0) x 10-13cm3molecule-1s-1.