报道了利用氮气放电产生的活性氮有效制备激发态卤氮自由基NX(b)(X=F,Cl,Br)的方法.在流动余辉装置上,将含溴有机物CH2Br2、CHBr3、C2H5Br、C4H9Br加入到活性氮中,在550～750nm观察到了较强的NBr(b→X)跃迁发射光谱.机理分析表明,活性氮中的基态氮原子N(4S)与含溴分子反应首先产生基态的NBr,由于亚稳态分子N2(A3Σ+u)的能量转移作用,基态NBr被激发到NBr(b).当含氯有机物CCl4、SOCl2加入到活性氮中时,观察到了NCl(b→X)的发射光谱,而当CHCl3、CH2Cl2加入到活性氮中时,却没有观察到NCl(b)态的辐射跃迁.当SF6与氮气混合放电时,观察到了NF(b)态的跃迁发射谱.分析表明,基态的NCl和NF自由基分别是由N(4S)+CCl3(SOCl2)→NCl(X)+CCl2(SOCl)和N(4S)+SF5→NF(X)+SF4通道产生的,再通过N2(A)能量转移到激发态. A method for efficiently preparing excited-state halogen nitroxide NX (b) (X = F, Cl, Br) by utilizing active nitrogen generated by nitrogen gas evolution is reported. In the afterglow device, bromine- containing organic compounds such as CH2Br2, CHBr3, C2H5Br, C4H9Br (B → X) transition emission spectra were observed at 550-750 nm.The mechanism analysis showed that the ground state nitrogen atom N (4S) in the active nitrogen reacted with the bromine-containing molecule to generate the NBr , NBr is excited to NBr (b) due to the energy transfer of the metastable molecule N2 (A3Σ + u). When chlorine-containing organic compounds CCl4 and SOCl2 are added to the active nitrogen, NCl (b → X) Emission spectrum, and no transitions of the NCl (b) state were observed when CHCl3 and CH2Cl2 were added to the active nitrogen, and the transition emission spectrum of the NF (b) state was observed when the mixed discharge of SF6 and nitrogen was observed , The NCl and NF radicals in the ground state are generated by N (4S) + CCl3 (SOCl2) → NCl (X) + CCl2 (SOCl) and N (4S) + SF5 → NF (X) + SF4 channels respectively N2 (A) energy transfer to the excited state.