Gas-Phase Reactions of Nickel and Nickel Oxide Clusters with Nitrogen Dioxide. 4. Continued Kinetic and Mechanistic Investigation of Nickel Cluster Reactions with NOxGases

Results of investigations of the gas-phase reactions of nickel and nickel oxide ions with NO{sub 2} are reported in this final part of a four-part series. A fast flow reactor-quadrupole mass spectrometer system coupled with a laser vaporization source is used to study reactions of nickel and nickel oxide cluster ions with nitrogen dioxide. Pseudo-first-order biomolecular rate constants for the reactions of NO{sub 2} with nickel and nickel oxide cluster cations and anions are reported. The product distributions indicate that several different reaction mechanisms occur between NO{sub 2} and various sizes of nickel and nickel oxide cluster ions. The reaction processes are mainly oxidation of the nickel clusters and NO{sub 2} addition. Finally, a detailed comparison is made between these reactions and previously reported ones with nitric oxide and oxygen.