We present measurements of the collisional fluorescence quenching cross section of NO (A²Σ⁺) by benzene and hexafluorobenzene at a series of temperatures using a custom built slow flow cell and a pulsed de Laval nozzle test cell. The measurements show a deviation from the common harpoon mechanism of collisional fluorescence quenching, specifically the large quenching cross section of 147 Ų at 300 K measured for benzene which is not predicted by the harpoon mechanism due to the low electron affinity of benzene (-1.5 eV). We speculate that the quenching of NO (A²Σ⁺) by benzene and hexafluorobenzene occurs through near resonance electronic energy transfer from the NO A-state to the A-state of the quencher via a pseudo-emission process. The predicted T^-1/3 dependence of the cross section for this model is consistent with the experimental observations.

我们碰撞荧光淬灭（A NO的横截面的本测量² Σ ⁺在一系列使用定制的缓慢流动池和一个脉冲德拉瓦尔喷嘴测试单元温度）由苯和六氟苯。测量结果表明，从碰撞荧光猝灭的共同鱼叉机构的偏差，特别是大的淬火横147的区段²，在用于没有由鱼叉机构预测苯测定300°K由于苯的低电子亲合势（-1.5 eV）。我们推测，NO的（淬火阿² Σ ⁺苯和六氟苯通过伪发射过程从淬灭剂的NO A-态向A-态的近共振电子传递而产生苯胺和六氟苯。该模型的横截面的预测T ^-1/3依赖性与实验观察结果一致。