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10 1 32 5Pa ,2 98K ,O2 N2 气氛下 ,采用长光路Fourier变换红外光谱 (FT IR)仪跟踪反应进程 ,高压液相色谱 (HPLC)仪测定反应产物中有机过氧化物的方法研究了氯原子引发的甲烷光化学反应 .实验结果证实反应产物中有过氧化氢(H2 O2 ) ,甲基过氧化氢 (CH3 OOH ,MHP)和过氧甲醚 (CH3 O2 CH3 ) ,并发现还存在羟甲基过氧化氢 (HOCH2 OOH ,HMHP)和一未知有机过氧化物 .HMHP的发现为过氧甲基CH3 OO·自身复合产生Criegee中间体CH2 OO的途径提供了实验证据 .模拟实验显示甲烷光化学氧化产生有机过氧化物的机制比以往认为的要更为复杂 .甲烷的光化学氧化可能是大气对流层有机过氧化物的重要来源
The progress of the reaction was monitored by Fourier Transform Infrared Spectroscopy (FT IR) at 10 1 32 5Pa, 2 98K and O2 N2 atmosphere. The determination of organic peroxides in the reaction products by high pressure liquid chromatography (HPLC) Atomic Initiation of Photochemical Reactions of Methane The results of the experiments confirmed the presence of hydrogen peroxide (H2 O2), methyl hydrogen peroxide (CH3 OOH, MHP) and peroxy methyl ether (CH3 O2 CH3) Hydrogen peroxide (HOCH2 OOH, HMHP) and an unknown organic peroxide, the discovery of HMHP provided experimental evidence that peroxymethyl CH3 OO · itself complexed to produce Criegee intermediate CH2 OO. Simulations have shown that photochemical oxidation of methane The mechanism by which organic peroxides are generated is more complicated than previously thought. Photochemical oxidation of methane may be an important source of atmospheric tropospheric organic peroxides