CH_2(~3B_1)与NO的基元化学反应研究

Cth和NO都具有未配对电子,它们之间的反应属于自由基之间的反应．该反应可能经历的通道很多,因此研究这个反应,具有重要的学术价值．另一方面,烃类在燃烧过程中可热解成CH、CW、C：H或CIn等自由基碎片’‘’,亚甲基CW与NO的反应是重要的基元反应之一．除此之外NO是重要的环境污染物,在大气中低浓度NO能够存在较长时间”’,可继续与CHZ自由基发生反应．因此就环境保护方面来说,CIn自由基与NO反应的研究也有较大的现实意义．虽然以前很多人都通过实验测出过CW与NO总反应的速车常数’‘,’－’‘,但关于反应动力学方面的…     

CH2(～X3B1)与NO的基元化学反应研究

The reaction of methylene radicals in their 3B1 electronic ground state with molecular NO was studied. Pure CH2(～X3B1) radicals were produced by UV photolysis of ketene at 351 nm. The products were measured by Time-Resolved Fourier Transform Infrared (TR-FTIR) spectrometer. CO、OH、NH2 and HOCN or its isomer HNCO were found as primary products and several possible channels of this reaction were suggested.     

CH_2(~3B_1)自由基与N_2O反应的研究

CH2是燃烧和大气光化学中重要的自由基之一[1]．在燃烧过程中,CH2自由基由碳氢化合物分子热解或由O原子和C2H2等反应生成．这种高活性的中间体,又可进一步与燃烧过程中其它重要物质如NOx（NO、NO2、N2O）发生反应．在低温燃烧过程中,N2O是NOx存在的主要形式,所以,研究CH2自由基与N2O的反应,对于了解燃烧机制有重要意义．就我们所知,关于CHZ和N20的反应,国内外还未见文献报导．本文从态-态反应的层次上,开展基电子态CH2（X3B1）自由基与N2O反应的实验研究．我们利用351um紫外激光光解CH2CO产生CH2自由基,这种方法…     

CH2((X)3B1)自由基与N2O反应的研究

The reaction dynamics of methylene radicalCH2((x)3B1)with N2O was investigated by Time Resolved Fourier Transform Infrared Spectroscopy(TR-FTIRS). Pure CH2((x)3B1) radical was produced via laser photolysis of ketene at 351 nm.. Nascent vibrationally excited products CO , NO and HCN were observed.. Some reaction pathways which may lead to these products were proposed and a possible reaction mechanism was outlined..     

CH2(X 3B1)与NO的基元化学反应研究

The reaction of methylene radicals in their 3 B1 electronic ground state with molecular NO was studied. Pure CH2(X 3 B1 ) radicals were produced by UV photolysis of ketene at 351 nm. The products were measured by Time-Resolved Fourier Transform Infrared (TR-FTIR) spectrometer. CO.OH .NH2 and HOCN or its isomer HNCO were found as primary products and several possible channels of this reaction were suggested.     

CH2(X 3B1)自由基与N2O反应的研究

The reaction dynamics of methylene radical CH2(X3B1) with N2O was investigated by Time-Resolved Fourier Transform Infrared Spectroscopy(TR-FTIRS). Pure CH2(X3B1) radicalwas produced via laser photolysis of ketene at 351 nm. Nascent viabrationally excited products CO, NO and HCN were observed. Some reaction pathways which may lead to these products were proposed and a possible reaction mechanism was outlined.     

二甲基硫醚的光解特性

本文对二甲基硫醚(DMS)在有氧、无氧及有H₂O₂存在的情况下紫外光辐照。然后在20m长光程池中藉富里叶红外光谱仪测定光解产物的吸收光谱。实验表明在无氧的情况下DMS的C─S键断裂,并生成CH₃SSCH₃及C₂H₆,在有氧存在下生成HCHO及CH₃SO₃H,在有H₂O₂存在下生成CH₃SSCH₃.本文讨论了光解的可能机理,合理地解释光解产物的生成。     

北京石景山地区飘尘中的多环芳烃成分研究

多环芳烃(PAH)是一类重要的化学致癌物质,它们产生自燃烧过程并粘附于大气飘尘上,已有确实的证据认为PAH可以诱发肺癌,导致城市居民肺癌发病率增高。燃料的结构及烧燃过程的控制决定了PAH污染大气的状况,大气颗粒物中的PAH量是综合评价该地大气环境污染的重要指标。 毛细管气相色谱/质谱(HRGC/MS)联用方法是分离,鉴定少于六个母环的PAH