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引言自由基是许多气相反应的中间物。研究自由基对理解这些反应的历程有着重大的意义。研究自由基的方法很多,经典的Paneth的镜法限于低温、低压和无氧系统。光谱方法已成功地用于某些自由基,如已用于火焰中OH,CH,SO,NH等自由基的检出和研究。氧的存在常常使光谱技术因Schumann吸收而发生困难。微波谱和顺磁共振也用于气相中自由基的研究。用顺磁共振还能决定自由电子的位置。质谱计提供了用分子量和电离电位来鉴别自
Introduction Radicals are intermediates for many gas-phase reactions. Studying free radicals is of great importance for understanding the course of these reactions. There are many ways to study free radicals. The classic Paneth method is limited to cryogenic, low-pressure and anaerobic systems. Spectroscopic methods have been successfully used for some free radicals, such as OH, CH, SO, NH and other free radicals have been used for the detection and research. The presence of oxygen often makes spectral techniques difficult to absorb by Schumann. Microwave spectroscopy and paramagnetic resonance are also used for the study of free radicals in the gas phase. With paramagnetic resonance can also determine the location of free electrons. Mass spectrometry provides the use of molecular weight and ionization potentials to identify themselves