Reactions of laser-ablated aluminum atoms with nitrogen during condensation at 10 K. Infrared spectra and density functional calculations for Alx Ny molecular

Low-Temperature Physics and Chemistry in Cryomatrice

Анотація

Laser-ablated aluminum atoms react with dinitrogen on condensation at 10 K to form N₃ radical and the subject molecules, which are identified by nitrogen isotopic substitution, further reactions on annealing, and comparison with isotopic frequencies computed by density functional theory. The major AlN₃ product is identified from three fundamentals and a statistically mixed nitrogen isotopic octet pattern. The aluminum rich Al₂N and Al₃N species are major products on annealing to allow diffusion and further reaction of trapped species. This work provides the first experimental evidence for molecular Al_xN_y species that may be involved in ceramic film growth.