t-Bu),BzN(O)nitrobenzyl bromide, 100-11-8; p-nitrobenzyl duryl nitrodide, 84802-29-9; methyl iodide, 74-88-4; N-methyl-N-tris(tert-bu-ty1)phenyl nitroxide radical, 33721-34-5; N-methoxy-N-tris-(tert-buty1)phenyl anilino radical, 64191-72-6; benzyl bromide, electrochemical cell. CHZ(CBHJNO2,,BzN(O)H,The nitrate radical, NO3, was directly detected by the laser-induced fluorescence method. The band structure of the fluorescence excitation spectrum was consistent with that of the absorption spectrum. The fluorescence spectrum excited at 662 nm corresponding to the 0-0 transition showed progressions with 1060-and 1480-cm-' intervals, which were assigned to the symmetric stretching (vl) and degenerate antisymmetric stretching (v3) modes of the ground state NO,, respectively. The fluorescence lifetime excited at the 0-0 band was estimated to be 2.8 ~s from the Stern-Volmer plots in the pressure region of 0.04-0.6 torr.(9) J. R. McDonald, private communication.
Geophys. Res. Lett., 7 , 89 (1980).Perturbations around steady states of a system of cerium or manganese bromide and bromate ions in a sulfuric acid solution, in a continuous stirred tank reactor (CSTR), are investigated. Two kinds of perturbations are discussed, namely, small-species and large-constraint ones. The feasibility of measuring a particular rate constant by following the system behavior after a small perturbation is analyzed. Some general theorems regarding this behavior are obtained. Large perturbations, namely, those that cause a transition of the system from one steady state to another, are analyzed and an approximate relationship between the perturbations' intensity and length is developed. The results are in good agreement with the experimental data.
