Orange chemiluminescence from NO2

A spectroscopic and kinetic investigation of the visible and near infrared luminescnece produced in a system containing nitric oxide, oxygen atoms, and nickel is presented. The emission spectrum is shown to be a continuum extending from 500 nm to beyond 900 nm with a maximum near 800 nm. The rate law governing this emission is shown to be I=k[O2(A, A′)][NO][O2]/[M], where k=7×10−14 cm3 molecule s−1, and [O2(A, A′] represents the combined concentrations of the 3Σu+ and 3Δu states of oxygen.