化学学报 ›› 1996, Vol. 54 ›› Issue (12): 1186-1193. 上一篇    下一篇

研究论文

固体氩中一氧化氮的低温氧化

王雪峰;许颜正;余敏;郑企克   

  1. 复旦大学激光化学研究所
  • 出版日期:1996-12-15 发布日期:1996-12-15

Studies of the reaction of O~2 and NO isolated in matrix

WANG XUEFENG;XU YANZHENG;YU MIN;ZHENG QIKE   

  • Online:1996-12-15 Published:1996-12-15

本文研究了在低温固体Ar中NO和O~2的反应。采用Ar作基质, 将NO和O~2分层沉积或混合沉积在低温基板上, 通过逐渐升温来控制扩散速率, 在温度10K-35K范围内, 从样品付里叶变换红外光谱的变化, 首次观察了NO和O~2反应中间体的生成和转化, 由此给出了反应机理, 即NO在Ar基质中首先发生扩散和聚合, 生成cis-(NO)~2, 随后与氧反应生成asym-N~2O~3和iso-N~2O~4, 而asym-N~2O~3进一步氧化生成N~2O~4(D~2~h)。

关键词: 氧化, 氧, 基质, 氩, 一氧化氮, 傅里叶变换红外分光光度法

The reaction of NO and oxygen in gas phase has been studied intensively, but the intermediates still remain unclear. This paper presents a method to see the intermediates of the reaction of oxygenand NO isolated in Ar via softening the rigid matrix and making reactant molecules diffuse slowly and collide for the first time. The reaction products are probed with a Fourier Transform Infrared Spectrometer. Results show that below 20K, only dimerization takes place. When the temperature reaches 30K, the absorption of iso-N~2O~4 and asym-N~2O~3 appear and that of dimers decreases. When the temperature is raised above 35K, N~2O~4(D~2~h) and asym-N~2O~3 are formed.

Key words: OXIDATION, OXYGEN, MATRIX, ARGON, NITROGEN MONOXIDE

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